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constructive solutionswww.fosroc.com
Fosroc Solutions for
Waterstops
Leader in delivering
Constructive Solutions
Worldwide!
Since the company’s beginnings over 50 years ago, Fosroc has developed into an
International leader in delivering Constructive Solutions for projects across a broad
range of market segments including transport, utilities, industrial and general
buildings.
Fosroc’s commitment to customer service and technical support is second to none.
We work closely with architects, structural engineers, contractors and owners to best
understand their requirements. Together we can develop a bespoke solution for a
construction project, adding value and becoming more than just a materials supplier,
but a solution provider.
Fosroc has an extensive network of offices and manufacturing locations across
Europe, the Middle East, India, North and South Asia, and is further represented in
other regions across the world by distributor and licensee partners.
Selecting from the full portfolio of Fosroc products and services and integrating
expert technical support, world class customer service and innovation, Fosroc goes
beyond just product selling to ensure that we partner with our customers to deliver
complete constructive solutions.
ABOUT
FOSROC INTERNATIONAL
>>Admixtures
>>Adhesives
>>Protective Coatings
>>Concrete Repairs
>>Industrial Flooring
>>Grouts & Anchors
>>Joint Sealants
>>Surface Treatments
>>Grinding Aids
>>Waterproofing
FOSROC DELIVER SOLUTIONS
NOT JUST PRODUCTS
CAD Details
A library of standard
CAD details are available,
bespoke CAD details can
be created for your specific
project
Project Specifications
Dedicated specification
managers on hand to assist
with correct system choices
and tailored solutions
Site Support
Expert product and
application support made
available from our specialist
teams.
Seminar & Training
Comprehensive programme
of seminars and training
courses designed to
expand and reinforce your
knowledge.
WWW.FOSROC.COM2 WWW.FOSROC.COM 3
FOSROC
BUILDINGS EXPERTISEFOSROC’s vast experience in providing
constructive solutions to many famous building
structures around the world has been built on
a broad portfolio of products. These include
waterproof membranes, waterstops, joint
sealants, concrete repair mortars, resin flooring,
protective coatings, structural strengthening,
grouts and concrete admixtures manufactured
to the highest quality standards backed by
independent test certificates.
At Fosroc we recommend the best technology
for each project rather than being driven by one
particular response. We liaise and evaluate with
our customers the most appropriate solution for
what they are trying to achieve. We just want to
deliver what is best to the customer providing
peer to peer based solutions for engineering
problems to ultimately find a number of ways to
create value.
The scale of the projects being entrusted with
Fosroc are epitomised by a huge nuclear power
plant being built in Barakah in the UAE, which
requires extensive waterproofing covering the
complete buildings and inlet channels.
Supercast PVC waterstops were chosen for all
concrete joints, along with Proofex Engage, a
pre-applied water/gasproofing membrane and
Proofex Alkorplan PVC membrane.
WWW.FOSROC.COM4 WWW.FOSROC.COM 5
TYPICAL
APPLICATIONS
Every sizeable concrete retaining wall, basement slab, reservoir tank, length of tunnel must
have joints. These may be a mixture of construction or expansion joints but all such joints in
direct contact with water need the protection of a waterstop.
The waterstops can be hydrophilic or impervious PVC strips which are cast into the concrete
at the joints to prevent the passage of water.
To cater for every application, Fosroc have a portfolio of Supercast PVC and Swellable
waterstops which have been successfully installed all over the world for many decades.
JOINT TYPES
As their name implies, these joints are used to simplify
construction; they are not intended to accommodate
movement. Nevertheless, cracks tend to develop at breaks in
construction whether wanted or not, so construction joints
have to be designed with cracking in mind; for example a PVC
waterstop placed over the blinding and cast into a basement
floor.
CONSTRUCTION JOINTS
These create a gap in the structure to allow for both
expansion and contraction caused by thermal and moisture
movements. These joints are usually formed by installing
a compressible filler board between sections. ‘Settlement’
joints are included under this heading - or any joint designed
to take up such movement. Locating expansion joints
demands careful thought, considering not only the spacing
needed to avoid cracking but also a pleasing appearance
and access for subsequent maintenance.
EXPANSION JOINTS
These are for relieving shrinkage stresses induced in
concrete as it sets; stresses that would otherwise cause
random cracking. A contraction joint may be designed as a
complete break in the structure, each cast butting against
the previous one. If more structural stability is needed
between sections the reinforcement may be continued
across the joint to restrict its opening. Forming grooves in
the concrete surface - top, bottom or both - makes another
kind of contraction joint to induce cracks to form along
predetermined planes of weakness. A waterstop may be
incorporated into such joints.
CONTRACTION JOINTS
WWW.FOSROC.COM6 WWW.FOSROC.COM 7
Fosroc Supercast PVC waterstop profiles have been
designed with high performance at their core. These
profiles capture the best principles of PVC waterstop
engineering utilising tortuous path ribs, correct bulb
shapes giving excellent sealing effect acting as valves,
eyelets for secure placement and sloping web thickness
to avoid cracking.
For over four decades Fosroc Supercast PVC
waterstops have been installed in many projects
throughout the world achieving assured long term
performance even in extreme conditions, resulting in
prevention of unwanted water penetration.
SUPERCAST PVC
WATERSTOPS
Drying Shrinkage of Concrete
Valve Principle
When drying shrinkage takes
place, the edge bulbs of the
profile act as anchors, inducing
tensions across the waterstop
thereby resulting in a sealing
effect at the inner faces of the
edge bulbs
Sloped Plain Profile
The plain slope in the centre
of the waterstop is directed
along the concrete movement
direction to avoid cracks in the
concrete edges and to maintain
perfect interlock
Tortuous Path Principle
Complex cross section
presenting a much greater
resistance and more difficult
path for water to seep around
the section
Eyeleted Flange
The eyeleted reinforced edge
flange enables the waterstop
to be easily positioned by
wiring to the surrounding
reinforcement.
ENGINEERED SOLUTIONS
Fosroc Supercast PVC waterstops allow freshly poured structural concrete to flow around them. However, designs that
include large congested ribs can create confined spaces and lead to a restriction in the concrete flow which could limit
compaction and the interlocking process between the waterstop and the concrete.
Beware of ultra-flexible and relatively loose PVC waterstops which can be easily displaced upon pouring of fresh concrete.
Fosroc Supercast PVC profiles are flexible, elongation >300%, but suitably firm (Shore Hardness between 80 - 90).
Fosroc Supercast PVC waterstops are manufactured
to the highest quality standards in factories that are
ISO 9001 and ISO 14001 quality assured.
These waterstops when combined with Fosroc
Proofex membranes and Nitoseal joint sealants
continue to give clients around the world piece of
mind, with compatible systems providing structural
integrity ensuring long term performance.
When sealing joints in water
tank roofs it is not always
practical to install a centrally
placed waterstop. An externally
placed bandage strip such as
Fosroc Expoband H45 is ideal
for this application. Hydrocell
XL joint filler board and
Nitoseal MS600 joint sealants
complete the system.
To ensure a firm fix, Fosroc
Supercast Watafoil and
Hydrofoil PVC waterstops
incorporate a row of eyelets
along both edges for wiring to
nearby steel reinforcement.
Make sure that there is
adequate clearance between
the waterstop and surrounding
steel reinforcement for wiring
and to ensure good compaction
of concrete.
Fosroc Supercast Rearguard R and S PVC
waterstops have an “outboard” flange along
each edge for nailing to the formwork or blinding
concrete
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Supercast Product 150 200 250 330 Description
Watafoil * * ** * Centrally placed construction joint
Hydrofoil * * * * Centrally placed expansion joint
XHD Watafoil * Heavy duty centrally placed construction joint
XHD Hydrofoil * Heavy duty centrally placed expansion joint
Rearguard R * * * * Externally placed construction joint
Rearguard S * * * * Externally placed expansion joint
XHD Rearguard R * Heavy duty externally placed construction joint
XHD Rearguard S * Heavy duty externally placed expansion joint
XHD Rearguard SLX * Heavy duty Externally placed settlements and high movements
Twinstop Hydrofoil * Centrally placed composite hydrophilic / pvc
Twinstop Rearguard S * Externally placed composite hydrophilic / pvc
Angleguard * Externally placed 90o
angled waterstop
Rearguard C * Compartment waterstop for PVC membranes
PROFILE SELECTOR
SUPERCAST PVC PROFILES SUPERCAST TWINSTOP
Fosroc Supercast PVC compound meets the US Corps
of Engineers specification CRD-C 572-74 requiring a
tensile strength in excess of 14N/mm2
and an elongation
at break in excess of 300%.
The PVC compound when tested to BS 2782 @ 25oC
achieved the following test results;
Tensile Strength			 >15N/mm2
Elongation at break		 >300%
Hardness			 80 to 90 Shore A
Hydrostatic head of water	 up to 100m (10 bar)
Movement capability		 up to 10mm
Hydrofoil			
Rearguard S			 up to 40mm
Rearguard SLX XHD		 up to 60mm
Angleguard
XHD Hydrofoil
XHD Rearguard S
Rearguard S
Hydrofoil
Rearguard R
Rearguard C
XHD Rearguard R
XHD Rearguard SLX
Watafoil
XHD Watafoil
Fosroc Supercast PVC waterstops are manufactured in a
range of sizes, the appropriate size in each case being the
one that has a width closest to that of the wall or slab to be
jointed.
Cross sectional profiles are formed in two fundamentally
different shapes: one for casting centrally into a wall or slab,
the other for casting into the outer face of a wall or slab.
Centrally placed waterstops provide an efficient barrier to
penetration of water from either face of the wall or slab, they
demand careful fixing in the formwork before concreting.
Externally placed waterstops are easier to fix by nailing
through the “outboard” flange and prevent the passage of
water from the outside of the structure, typically used in
piled wall basement construction.
Where high water tables exist in deep basement
construction and the highest possible watertight
design is required, then use Fosroc Supercast Twinstop.
Fosroc Supercast Twinstop is a combined PVC and
hydrophilic waterstop for extra protection. The PVC
profile performs as normal but when water reaches
the hydrophilic inserts, they expand to form a sealed
barrier.
The hydrophilic inserts are based on Fosroc’s basic
polymer swellable compound which is post-inserted
into the PVC waterstop meaning there is no chance
of pre-swell prior to concrete casting. The hydrophilic
insert has a large surface area allowing excellent
swelling performance.
Fosroc Supercast Twinstop is available in 250mm
width for both centrally and externally placed
expansion joints.
Centrally placed
Externally placed
Twinstop Hydrofoil
Twinstop Rearguard S
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SUPERCAST PVC WELDED JOINTS &
INTERSECTIONS
EQUIPMENT REQUIRED CUT SQUARE EDGES
INSERT HOT BLADE
BLADE CLEANING SECURE INTO JIG
HOLD TOGETHER PVC MELTING SQUEEZE TOGETHER
PVC waterstops should always be joined by welding using the process above, never by lapping. Fosroc supply jigs and
heating blades suitable for making simple butt joints on site.
Although it is possible to weld mitres and corners on site it is advisable to purchase factory-made intersections from Fosroc,
then to butt-weld these to the standard rolls of waterstop on site. This method speeds up installation and means that only
simple straight welds are required. Intersections available include those of dissimilar profiles e.g. Supercast Watafoil to
Hydrofoil or Supercast Rearguard S to Hydrofoil.
For complex geometries or repeated shapes, special bespoke fabrications can be supplied. These fabrications are made-
to-order in our premises and delivered to site in pre-agreed sections. To take advantage of this service please contact your
local Fosroc specification / sales manager who will assist you in this process.
Baraka Nuclear Power Plant – UAE
47,000 m2 water proofing system for substructure was
required as per the specification, Fosroc specified Proofex
PGP loose laid PVC waterproofing membrane system, which
is loose laid with heat welded water tight joints Proofex
PGP was approved and applied successfully.All joints were
sealed using Supercast PVC waterstops.
SUPERCAST PVC
CASE STUDIES
Water Treatment Plant
Saudi Arabia
Seagate Shugart
Singapore
Al Habtoor Palace
Dubai
Emirates Arena
Glasgow
Standard PVC intersections
for all profiles include;
•	 Mitre on flat
•	 Mitre on edge
•	 3 Way on flat
•	 4 Way on flat
•	 T-Piece on edge
Four Way on flat
intersection
Three Way on flat
intersection
WWW.FOSROC.COM12 WWW.FOSROC.COM 13
Fosroc Supercast SW waterstops are designed for
consistent long term performance throughout the
lifetime of a structure. Their superior polymer basis
allows them to expand and contract consistently
over multiple wet/dry cycles ensuring that water
passage is arrested.
SUPERCAST PERFORMANCE
Wet/Dry Cycle Performance Volume Swell Performance
SUPERCAST SWELLABLE
Fosroc Supercast SW waterstop strips use basic-polymer hydrophilic technology which allows them to swell on contact with
water creating a positive pressure against the faces of the joint thus preventing the passage of water.
The main advantage they have over conventional PVC waterstops for non-movement joints is that they provide a problem
solving solution for applications where, traditionally, complex formwork would have been required. They provide an
excellent solution for pipe entry sealing and also do not require hot welding on site.
Fosroc Supercast SW waterstops may be used for the integral sealing of construction joints. However due to the fact they
must be fully restrained to function properly, they should not be used in movement joints. In this instance a traditional
Fosroc Supercast PVC waterstop with expansion profile designed to accommodate movement should be used.
SUPERCAST
SW20
SUPERCAST
SW30
5mm x 20mm strip for use
where steel reinforcement is
continuous through the joint
10mm x 20mm strip for all
construction joints, water
pressure resistant up to 100m
10mm x 20mm strip for all
construction joints, water
pressure resistant up to
100m, special salt water grade
extra swell
SUPERCAST
SW10
There is a myth that the greater the swelling % the
better the swellable waterstop. This of course is wrong
because the main measures of success for a swellable
waterstop are based upon;
1) Wet/dry cycling long term performance
2) Ability to resist water pressure shortly after
concreting
3) Ability to resist water pressure for the life of the
structure
Fosroc Supercast SW strips gain swelling pressure
quickly after concreting and typically achieve an
equivalent water pressure resistance of 6 bar after 1
day.
Full watertighness testing has been carried out on a
specially designed test rig designed to simulate a real-
life construction joint sealed with Supercast SW20/30.
Positive water pressure is applied to the simulated joint,
and is increased up to a maximum pressure of 10 bar
(equivalent to 100m hydrostatic head). The joint can be
opened to simulate a crack in the construction joint,
and the Supercast SW20/30 tested for watertightness
at increasing gaps. Both Supercast SW20 and SW30 are
independently tested achieving 10 bar results even up
to 3mm gap.
WWW.FOSROC.COM14 WWW.FOSROC.COM 15
SUPERCAST PREDIMAX INJECTION
HOSE WATERSTOPS
Fosroc Supercast Predimax injection hose waterstops are designed to provide a means for future sealing of cracks in
concrete. They are fixed into the construction joint in a central position with a minimum of 80mm concrete cover. The fixing
clips are positioned at 150mm spacing. Hoses are overlapped at junction locations and terminated at the surface in junction
boxes.
Fosroc Supercast Predimax is available in 2 sizes, 11mm and 19mm external diameter. For multiple injection you should
first inject with cement, then micro cement then finally PU resin. The injection process should not commence prior to 6
weeks after the concrete has been cast, to allow for shrinkage and settlements.
Once secure connections have been made, begin the injection process. Fill hose with suitable injection material until it
emeges from the opposite end. Clamp the end shut.
Start injection at a pressure of between 75 and 150PSI. Once the injection material has filled the joint area and is no longer
flowing, gradually increase the pressure to a necessary delivery volume of between 500 and 600PSI.
Maintain this pressure for approximately 3 to 5 minutes, allowing for injection material to thoroughly penetrate the joint
area.
Once maximum pressure of 500 - 600PSI is held for the designated period of 3 - 5 minutes, disconnect the pump from the
injection vent and begin the connection process for injection at the opposite vent end; clamp the first injection end first.
Reinject the hose from the opposite end within the gel time of the injection material.
Disconnect the cap from the vent ends. Connect a vacuum pump to either one of the vent ends and place the other end into
a bucket filled with water.
Commence the vacuum process. The outer tube of the hose will close the injection ports and the remaining residual injection
material will be removed from the interior of the hose. Then flush with water.
As soon as the water flow is clean on the vacuum side, disconnect the water supply by removing the vent end from the
bucket of water. Disconnect the vacuum pump and close the injection vent ends and secure tightly with screws.
Predimax® 19
Predimax® 11
INJECTION METHOD
Binaural clamp
Injection nipple
Ventlating hose
red/white
Sealing plug
yellow
Hose clamp with
dowel/without
dowel
Predimax 19
Hot-shrinking hose
Hose clamp
Ø 20mm
Pressing nipple
Ventlating hose
red/white
Predimax 19
Hot-shrinking hose
Injection nipple
Pressing nipple
Binaural clamp
Ventlating hose
red/white
WWW.FOSROC.COM16 WWW.FOSROC.COM 17
BELOW-GROUND WATERPROOFING
Fosroc offers one of the most comprehensive ranges in below-
ground waterproofing, providing leak-free buildings around the
world. These systems are manufactured to the highest quality
standards backed by independent test certificates.
For below-ground structures where the exterior face of the
structural concrete is inaccessible, the waterproofing must be
applied prior to pouring the concrete. Conventional systems
are either loose-laid or self-adhering to the substrate not the
structural concrete, this means there is no seal between the
waterproofing and the structural concrete which can lead to
water travelling between the waterproofing and the structure
from any leakages that may occur. BS8102:2009 highlights this
problem and recommends that a fully-bonded pre-applied
waterproofing system be used to mitigate this risk. A similar
problem occurs where ground settlement takes place.
Fosroc have developed an innovative system, Proofex Engage,
which incorporates a unique cell mesh which mechanically bonds
to freshly placed concrete giving a tenacious waterproof seal,
preventing water migration even if ground settlement occurs. It
is installed rapidly with no need for blinding concrete, priming or
protection and can be trafficked immediately after application.
It is also gas resistant and highly durable and is unaffected by
contaminants within the ground. Quality is assured through
BBA and EN13967:2004 and the system is suitable for use in
accordance with BS8102:2009 Grades 1, 2 and 3.
•	 Rapid installation - no blinding concrete or protection
required.
•	 Assured watertight integrity even in the event of ground
settlement.
•	 No water-tracking.
•	 Easy jointing and compatible full range of ancillaries.
•	 Integrity assured at pile caps.
•	 Excellent solution for precast concrete.
•	 Protects structure against ground contaminants.
•	 Long term watertight durability.
Where a structurally integral waterproof system is chosen, (i.e. BS8102:2009 Type B) the Conplast WP range of hydrophobic
pore-blocking admixtures can be added to the insitu concrete. These admixtures reduce porosity and permeability, and
increase water and corrosion resistance. Optimum dosages can be recommended based on project specific details.
System type Example of application use Fosroc Product name
Pre-applied membrane Piled wall basements Proofex Engage
PVC membrane Basements Proofex PGP / Alkorplan
Self-adhesive membranes Ground slabs and shallow basements Proofex 3000 / GP / 12 / 3000MR
Liquid-applied membranes Foundations / dampproofing Nitoproof range
Cementitious coatings Existing basements Brushbond / Nitocote CM210
Torch-applied membranes Basements Proofex Torchseal
PVC waterstops Concrete joints Supercast Watafoil / Hydrofoil / Rearguard
Swellable waterstops Concrete joints Supercast SW10 / 20 / 30 / X
Injection hose waterstops Concrete joints Supercast Predimax
Drainage membranes Basements Proofex Sheetdrain / Cavitydrain
Waterproof admixtures Basements and ground slabs Conplast WP range
Supercast PVC and Supercast SW swellable waterstops
to stop the passage of water through joints in concrete
structures.
Supercast SW20 swellable strip achieves 1bar water pressure
resistance after 1 day and long term wet’dry cycling assuring
excellent performance throughout the life of the structure.
Nitocote CM210 provides an excellent
solution for waterproofing the outside or
inside faces of basement walls and floors
due to its ability to withstand both positive
and negative water pressure. This makes it
an ideal choice for waterproofing existing
basements. The system is easily applied
by brush, roller, trowel or spray and the
completed solution gives both water, fire and
CO2
protection.
Post-applied bitumen based waterproofing
for floors and walls can be easily installed
using Proofex GP / 3000 self-adhesive
membranes in conjunction with Proofex
Protection Boards. Proofex 3000MR is ideal
where gas is present in the ground or the soil
is contaminated. The aluminium foil layer in
the membrane provides resistance and long
term durability.
Proofex PGP / Alkorplan, a loose-laid PVC
membrane system, is available in large rolls.
Joining is realised through welding with hot
air. Compartments can be laid out using
Supercast PVC waterstops which are welded
to the membrane.
The Nitoproof liquid-applied coatings range
provides protection for foundations or for
dampproofing, they are easy to apply and
are available in a wide range of grades.
For BS8102:2009 Type C internal drained
cavity waterproofing, the structural concrete
is designed to minimise water penetration and
a suitable HDPE studded drainage membrane
is installed to collect groundwater seepage.
The groundwater is then directed to suitable
discharge points. Proofex Cavitydrain 80
and 200 drainage membranes can provide up
to 10L/s/m water flow capacity.
Supercast Predimax injection hose
waterstops for future provision of sealing
leaking joints.
WWW.FOSROC.COM18 WWW.FOSROC.COM 19
Details of your local Fosroc office can be found at
www.fosroc.com
Important Note
Fosroc products are guaranteed against defective materials and manufacture and are sold subject to
its standard terms and conditions of sale, copies of which may be obtained on request. Whilst Fosroc
endeavours to ensure that any advice, recommendation, specifcation or information it may give is
accurate and correct, it cannot, because it has no direct or continuous control over where or how its
products are applied, accept any liability either directly or indirectly arising from the use of its products,
whether or not in accdance with any advice, specification, recommendation or information given by it.
Fosroc offers a full range of construction chemical solutions, helping to protect structures
throughout the world. Please refer to our brochures, which include:
constructive solutions

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Fosroc solutions-for-waterstops-brochure(1)

  • 2. Leader in delivering Constructive Solutions Worldwide! Since the company’s beginnings over 50 years ago, Fosroc has developed into an International leader in delivering Constructive Solutions for projects across a broad range of market segments including transport, utilities, industrial and general buildings. Fosroc’s commitment to customer service and technical support is second to none. We work closely with architects, structural engineers, contractors and owners to best understand their requirements. Together we can develop a bespoke solution for a construction project, adding value and becoming more than just a materials supplier, but a solution provider. Fosroc has an extensive network of offices and manufacturing locations across Europe, the Middle East, India, North and South Asia, and is further represented in other regions across the world by distributor and licensee partners. Selecting from the full portfolio of Fosroc products and services and integrating expert technical support, world class customer service and innovation, Fosroc goes beyond just product selling to ensure that we partner with our customers to deliver complete constructive solutions. ABOUT FOSROC INTERNATIONAL >>Admixtures >>Adhesives >>Protective Coatings >>Concrete Repairs >>Industrial Flooring >>Grouts & Anchors >>Joint Sealants >>Surface Treatments >>Grinding Aids >>Waterproofing FOSROC DELIVER SOLUTIONS NOT JUST PRODUCTS CAD Details A library of standard CAD details are available, bespoke CAD details can be created for your specific project Project Specifications Dedicated specification managers on hand to assist with correct system choices and tailored solutions Site Support Expert product and application support made available from our specialist teams. Seminar & Training Comprehensive programme of seminars and training courses designed to expand and reinforce your knowledge. WWW.FOSROC.COM2 WWW.FOSROC.COM 3
  • 3. FOSROC BUILDINGS EXPERTISEFOSROC’s vast experience in providing constructive solutions to many famous building structures around the world has been built on a broad portfolio of products. These include waterproof membranes, waterstops, joint sealants, concrete repair mortars, resin flooring, protective coatings, structural strengthening, grouts and concrete admixtures manufactured to the highest quality standards backed by independent test certificates. At Fosroc we recommend the best technology for each project rather than being driven by one particular response. We liaise and evaluate with our customers the most appropriate solution for what they are trying to achieve. We just want to deliver what is best to the customer providing peer to peer based solutions for engineering problems to ultimately find a number of ways to create value. The scale of the projects being entrusted with Fosroc are epitomised by a huge nuclear power plant being built in Barakah in the UAE, which requires extensive waterproofing covering the complete buildings and inlet channels. Supercast PVC waterstops were chosen for all concrete joints, along with Proofex Engage, a pre-applied water/gasproofing membrane and Proofex Alkorplan PVC membrane. WWW.FOSROC.COM4 WWW.FOSROC.COM 5
  • 4. TYPICAL APPLICATIONS Every sizeable concrete retaining wall, basement slab, reservoir tank, length of tunnel must have joints. These may be a mixture of construction or expansion joints but all such joints in direct contact with water need the protection of a waterstop. The waterstops can be hydrophilic or impervious PVC strips which are cast into the concrete at the joints to prevent the passage of water. To cater for every application, Fosroc have a portfolio of Supercast PVC and Swellable waterstops which have been successfully installed all over the world for many decades. JOINT TYPES As their name implies, these joints are used to simplify construction; they are not intended to accommodate movement. Nevertheless, cracks tend to develop at breaks in construction whether wanted or not, so construction joints have to be designed with cracking in mind; for example a PVC waterstop placed over the blinding and cast into a basement floor. CONSTRUCTION JOINTS These create a gap in the structure to allow for both expansion and contraction caused by thermal and moisture movements. These joints are usually formed by installing a compressible filler board between sections. ‘Settlement’ joints are included under this heading - or any joint designed to take up such movement. Locating expansion joints demands careful thought, considering not only the spacing needed to avoid cracking but also a pleasing appearance and access for subsequent maintenance. EXPANSION JOINTS These are for relieving shrinkage stresses induced in concrete as it sets; stresses that would otherwise cause random cracking. A contraction joint may be designed as a complete break in the structure, each cast butting against the previous one. If more structural stability is needed between sections the reinforcement may be continued across the joint to restrict its opening. Forming grooves in the concrete surface - top, bottom or both - makes another kind of contraction joint to induce cracks to form along predetermined planes of weakness. A waterstop may be incorporated into such joints. CONTRACTION JOINTS WWW.FOSROC.COM6 WWW.FOSROC.COM 7
  • 5. Fosroc Supercast PVC waterstop profiles have been designed with high performance at their core. These profiles capture the best principles of PVC waterstop engineering utilising tortuous path ribs, correct bulb shapes giving excellent sealing effect acting as valves, eyelets for secure placement and sloping web thickness to avoid cracking. For over four decades Fosroc Supercast PVC waterstops have been installed in many projects throughout the world achieving assured long term performance even in extreme conditions, resulting in prevention of unwanted water penetration. SUPERCAST PVC WATERSTOPS Drying Shrinkage of Concrete Valve Principle When drying shrinkage takes place, the edge bulbs of the profile act as anchors, inducing tensions across the waterstop thereby resulting in a sealing effect at the inner faces of the edge bulbs Sloped Plain Profile The plain slope in the centre of the waterstop is directed along the concrete movement direction to avoid cracks in the concrete edges and to maintain perfect interlock Tortuous Path Principle Complex cross section presenting a much greater resistance and more difficult path for water to seep around the section Eyeleted Flange The eyeleted reinforced edge flange enables the waterstop to be easily positioned by wiring to the surrounding reinforcement. ENGINEERED SOLUTIONS Fosroc Supercast PVC waterstops allow freshly poured structural concrete to flow around them. However, designs that include large congested ribs can create confined spaces and lead to a restriction in the concrete flow which could limit compaction and the interlocking process between the waterstop and the concrete. Beware of ultra-flexible and relatively loose PVC waterstops which can be easily displaced upon pouring of fresh concrete. Fosroc Supercast PVC profiles are flexible, elongation >300%, but suitably firm (Shore Hardness between 80 - 90). Fosroc Supercast PVC waterstops are manufactured to the highest quality standards in factories that are ISO 9001 and ISO 14001 quality assured. These waterstops when combined with Fosroc Proofex membranes and Nitoseal joint sealants continue to give clients around the world piece of mind, with compatible systems providing structural integrity ensuring long term performance. When sealing joints in water tank roofs it is not always practical to install a centrally placed waterstop. An externally placed bandage strip such as Fosroc Expoband H45 is ideal for this application. Hydrocell XL joint filler board and Nitoseal MS600 joint sealants complete the system. To ensure a firm fix, Fosroc Supercast Watafoil and Hydrofoil PVC waterstops incorporate a row of eyelets along both edges for wiring to nearby steel reinforcement. Make sure that there is adequate clearance between the waterstop and surrounding steel reinforcement for wiring and to ensure good compaction of concrete. Fosroc Supercast Rearguard R and S PVC waterstops have an “outboard” flange along each edge for nailing to the formwork or blinding concrete WWW.FOSROC.COM8 WWW.FOSROC.COM 9
  • 6. Supercast Product 150 200 250 330 Description Watafoil * * ** * Centrally placed construction joint Hydrofoil * * * * Centrally placed expansion joint XHD Watafoil * Heavy duty centrally placed construction joint XHD Hydrofoil * Heavy duty centrally placed expansion joint Rearguard R * * * * Externally placed construction joint Rearguard S * * * * Externally placed expansion joint XHD Rearguard R * Heavy duty externally placed construction joint XHD Rearguard S * Heavy duty externally placed expansion joint XHD Rearguard SLX * Heavy duty Externally placed settlements and high movements Twinstop Hydrofoil * Centrally placed composite hydrophilic / pvc Twinstop Rearguard S * Externally placed composite hydrophilic / pvc Angleguard * Externally placed 90o angled waterstop Rearguard C * Compartment waterstop for PVC membranes PROFILE SELECTOR SUPERCAST PVC PROFILES SUPERCAST TWINSTOP Fosroc Supercast PVC compound meets the US Corps of Engineers specification CRD-C 572-74 requiring a tensile strength in excess of 14N/mm2 and an elongation at break in excess of 300%. The PVC compound when tested to BS 2782 @ 25oC achieved the following test results; Tensile Strength >15N/mm2 Elongation at break >300% Hardness 80 to 90 Shore A Hydrostatic head of water up to 100m (10 bar) Movement capability up to 10mm Hydrofoil Rearguard S up to 40mm Rearguard SLX XHD up to 60mm Angleguard XHD Hydrofoil XHD Rearguard S Rearguard S Hydrofoil Rearguard R Rearguard C XHD Rearguard R XHD Rearguard SLX Watafoil XHD Watafoil Fosroc Supercast PVC waterstops are manufactured in a range of sizes, the appropriate size in each case being the one that has a width closest to that of the wall or slab to be jointed. Cross sectional profiles are formed in two fundamentally different shapes: one for casting centrally into a wall or slab, the other for casting into the outer face of a wall or slab. Centrally placed waterstops provide an efficient barrier to penetration of water from either face of the wall or slab, they demand careful fixing in the formwork before concreting. Externally placed waterstops are easier to fix by nailing through the “outboard” flange and prevent the passage of water from the outside of the structure, typically used in piled wall basement construction. Where high water tables exist in deep basement construction and the highest possible watertight design is required, then use Fosroc Supercast Twinstop. Fosroc Supercast Twinstop is a combined PVC and hydrophilic waterstop for extra protection. The PVC profile performs as normal but when water reaches the hydrophilic inserts, they expand to form a sealed barrier. The hydrophilic inserts are based on Fosroc’s basic polymer swellable compound which is post-inserted into the PVC waterstop meaning there is no chance of pre-swell prior to concrete casting. The hydrophilic insert has a large surface area allowing excellent swelling performance. Fosroc Supercast Twinstop is available in 250mm width for both centrally and externally placed expansion joints. Centrally placed Externally placed Twinstop Hydrofoil Twinstop Rearguard S WWW.FOSROC.COM10 WWW.FOSROC.COM 11
  • 7. SUPERCAST PVC WELDED JOINTS & INTERSECTIONS EQUIPMENT REQUIRED CUT SQUARE EDGES INSERT HOT BLADE BLADE CLEANING SECURE INTO JIG HOLD TOGETHER PVC MELTING SQUEEZE TOGETHER PVC waterstops should always be joined by welding using the process above, never by lapping. Fosroc supply jigs and heating blades suitable for making simple butt joints on site. Although it is possible to weld mitres and corners on site it is advisable to purchase factory-made intersections from Fosroc, then to butt-weld these to the standard rolls of waterstop on site. This method speeds up installation and means that only simple straight welds are required. Intersections available include those of dissimilar profiles e.g. Supercast Watafoil to Hydrofoil or Supercast Rearguard S to Hydrofoil. For complex geometries or repeated shapes, special bespoke fabrications can be supplied. These fabrications are made- to-order in our premises and delivered to site in pre-agreed sections. To take advantage of this service please contact your local Fosroc specification / sales manager who will assist you in this process. Baraka Nuclear Power Plant – UAE 47,000 m2 water proofing system for substructure was required as per the specification, Fosroc specified Proofex PGP loose laid PVC waterproofing membrane system, which is loose laid with heat welded water tight joints Proofex PGP was approved and applied successfully.All joints were sealed using Supercast PVC waterstops. SUPERCAST PVC CASE STUDIES Water Treatment Plant Saudi Arabia Seagate Shugart Singapore Al Habtoor Palace Dubai Emirates Arena Glasgow Standard PVC intersections for all profiles include; • Mitre on flat • Mitre on edge • 3 Way on flat • 4 Way on flat • T-Piece on edge Four Way on flat intersection Three Way on flat intersection WWW.FOSROC.COM12 WWW.FOSROC.COM 13
  • 8. Fosroc Supercast SW waterstops are designed for consistent long term performance throughout the lifetime of a structure. Their superior polymer basis allows them to expand and contract consistently over multiple wet/dry cycles ensuring that water passage is arrested. SUPERCAST PERFORMANCE Wet/Dry Cycle Performance Volume Swell Performance SUPERCAST SWELLABLE Fosroc Supercast SW waterstop strips use basic-polymer hydrophilic technology which allows them to swell on contact with water creating a positive pressure against the faces of the joint thus preventing the passage of water. The main advantage they have over conventional PVC waterstops for non-movement joints is that they provide a problem solving solution for applications where, traditionally, complex formwork would have been required. They provide an excellent solution for pipe entry sealing and also do not require hot welding on site. Fosroc Supercast SW waterstops may be used for the integral sealing of construction joints. However due to the fact they must be fully restrained to function properly, they should not be used in movement joints. In this instance a traditional Fosroc Supercast PVC waterstop with expansion profile designed to accommodate movement should be used. SUPERCAST SW20 SUPERCAST SW30 5mm x 20mm strip for use where steel reinforcement is continuous through the joint 10mm x 20mm strip for all construction joints, water pressure resistant up to 100m 10mm x 20mm strip for all construction joints, water pressure resistant up to 100m, special salt water grade extra swell SUPERCAST SW10 There is a myth that the greater the swelling % the better the swellable waterstop. This of course is wrong because the main measures of success for a swellable waterstop are based upon; 1) Wet/dry cycling long term performance 2) Ability to resist water pressure shortly after concreting 3) Ability to resist water pressure for the life of the structure Fosroc Supercast SW strips gain swelling pressure quickly after concreting and typically achieve an equivalent water pressure resistance of 6 bar after 1 day. Full watertighness testing has been carried out on a specially designed test rig designed to simulate a real- life construction joint sealed with Supercast SW20/30. Positive water pressure is applied to the simulated joint, and is increased up to a maximum pressure of 10 bar (equivalent to 100m hydrostatic head). The joint can be opened to simulate a crack in the construction joint, and the Supercast SW20/30 tested for watertightness at increasing gaps. Both Supercast SW20 and SW30 are independently tested achieving 10 bar results even up to 3mm gap. WWW.FOSROC.COM14 WWW.FOSROC.COM 15
  • 9. SUPERCAST PREDIMAX INJECTION HOSE WATERSTOPS Fosroc Supercast Predimax injection hose waterstops are designed to provide a means for future sealing of cracks in concrete. They are fixed into the construction joint in a central position with a minimum of 80mm concrete cover. The fixing clips are positioned at 150mm spacing. Hoses are overlapped at junction locations and terminated at the surface in junction boxes. Fosroc Supercast Predimax is available in 2 sizes, 11mm and 19mm external diameter. For multiple injection you should first inject with cement, then micro cement then finally PU resin. The injection process should not commence prior to 6 weeks after the concrete has been cast, to allow for shrinkage and settlements. Once secure connections have been made, begin the injection process. Fill hose with suitable injection material until it emeges from the opposite end. Clamp the end shut. Start injection at a pressure of between 75 and 150PSI. Once the injection material has filled the joint area and is no longer flowing, gradually increase the pressure to a necessary delivery volume of between 500 and 600PSI. Maintain this pressure for approximately 3 to 5 minutes, allowing for injection material to thoroughly penetrate the joint area. Once maximum pressure of 500 - 600PSI is held for the designated period of 3 - 5 minutes, disconnect the pump from the injection vent and begin the connection process for injection at the opposite vent end; clamp the first injection end first. Reinject the hose from the opposite end within the gel time of the injection material. Disconnect the cap from the vent ends. Connect a vacuum pump to either one of the vent ends and place the other end into a bucket filled with water. Commence the vacuum process. The outer tube of the hose will close the injection ports and the remaining residual injection material will be removed from the interior of the hose. Then flush with water. As soon as the water flow is clean on the vacuum side, disconnect the water supply by removing the vent end from the bucket of water. Disconnect the vacuum pump and close the injection vent ends and secure tightly with screws. Predimax® 19 Predimax® 11 INJECTION METHOD Binaural clamp Injection nipple Ventlating hose red/white Sealing plug yellow Hose clamp with dowel/without dowel Predimax 19 Hot-shrinking hose Hose clamp Ø 20mm Pressing nipple Ventlating hose red/white Predimax 19 Hot-shrinking hose Injection nipple Pressing nipple Binaural clamp Ventlating hose red/white WWW.FOSROC.COM16 WWW.FOSROC.COM 17
  • 10. BELOW-GROUND WATERPROOFING Fosroc offers one of the most comprehensive ranges in below- ground waterproofing, providing leak-free buildings around the world. These systems are manufactured to the highest quality standards backed by independent test certificates. For below-ground structures where the exterior face of the structural concrete is inaccessible, the waterproofing must be applied prior to pouring the concrete. Conventional systems are either loose-laid or self-adhering to the substrate not the structural concrete, this means there is no seal between the waterproofing and the structural concrete which can lead to water travelling between the waterproofing and the structure from any leakages that may occur. BS8102:2009 highlights this problem and recommends that a fully-bonded pre-applied waterproofing system be used to mitigate this risk. A similar problem occurs where ground settlement takes place. Fosroc have developed an innovative system, Proofex Engage, which incorporates a unique cell mesh which mechanically bonds to freshly placed concrete giving a tenacious waterproof seal, preventing water migration even if ground settlement occurs. It is installed rapidly with no need for blinding concrete, priming or protection and can be trafficked immediately after application. It is also gas resistant and highly durable and is unaffected by contaminants within the ground. Quality is assured through BBA and EN13967:2004 and the system is suitable for use in accordance with BS8102:2009 Grades 1, 2 and 3. • Rapid installation - no blinding concrete or protection required. • Assured watertight integrity even in the event of ground settlement. • No water-tracking. • Easy jointing and compatible full range of ancillaries. • Integrity assured at pile caps. • Excellent solution for precast concrete. • Protects structure against ground contaminants. • Long term watertight durability. Where a structurally integral waterproof system is chosen, (i.e. BS8102:2009 Type B) the Conplast WP range of hydrophobic pore-blocking admixtures can be added to the insitu concrete. These admixtures reduce porosity and permeability, and increase water and corrosion resistance. Optimum dosages can be recommended based on project specific details. System type Example of application use Fosroc Product name Pre-applied membrane Piled wall basements Proofex Engage PVC membrane Basements Proofex PGP / Alkorplan Self-adhesive membranes Ground slabs and shallow basements Proofex 3000 / GP / 12 / 3000MR Liquid-applied membranes Foundations / dampproofing Nitoproof range Cementitious coatings Existing basements Brushbond / Nitocote CM210 Torch-applied membranes Basements Proofex Torchseal PVC waterstops Concrete joints Supercast Watafoil / Hydrofoil / Rearguard Swellable waterstops Concrete joints Supercast SW10 / 20 / 30 / X Injection hose waterstops Concrete joints Supercast Predimax Drainage membranes Basements Proofex Sheetdrain / Cavitydrain Waterproof admixtures Basements and ground slabs Conplast WP range Supercast PVC and Supercast SW swellable waterstops to stop the passage of water through joints in concrete structures. Supercast SW20 swellable strip achieves 1bar water pressure resistance after 1 day and long term wet’dry cycling assuring excellent performance throughout the life of the structure. Nitocote CM210 provides an excellent solution for waterproofing the outside or inside faces of basement walls and floors due to its ability to withstand both positive and negative water pressure. This makes it an ideal choice for waterproofing existing basements. The system is easily applied by brush, roller, trowel or spray and the completed solution gives both water, fire and CO2 protection. Post-applied bitumen based waterproofing for floors and walls can be easily installed using Proofex GP / 3000 self-adhesive membranes in conjunction with Proofex Protection Boards. Proofex 3000MR is ideal where gas is present in the ground or the soil is contaminated. The aluminium foil layer in the membrane provides resistance and long term durability. Proofex PGP / Alkorplan, a loose-laid PVC membrane system, is available in large rolls. Joining is realised through welding with hot air. Compartments can be laid out using Supercast PVC waterstops which are welded to the membrane. The Nitoproof liquid-applied coatings range provides protection for foundations or for dampproofing, they are easy to apply and are available in a wide range of grades. For BS8102:2009 Type C internal drained cavity waterproofing, the structural concrete is designed to minimise water penetration and a suitable HDPE studded drainage membrane is installed to collect groundwater seepage. The groundwater is then directed to suitable discharge points. Proofex Cavitydrain 80 and 200 drainage membranes can provide up to 10L/s/m water flow capacity. Supercast Predimax injection hose waterstops for future provision of sealing leaking joints. WWW.FOSROC.COM18 WWW.FOSROC.COM 19
  • 11. Details of your local Fosroc office can be found at www.fosroc.com Important Note Fosroc products are guaranteed against defective materials and manufacture and are sold subject to its standard terms and conditions of sale, copies of which may be obtained on request. Whilst Fosroc endeavours to ensure that any advice, recommendation, specifcation or information it may give is accurate and correct, it cannot, because it has no direct or continuous control over where or how its products are applied, accept any liability either directly or indirectly arising from the use of its products, whether or not in accdance with any advice, specification, recommendation or information given by it. Fosroc offers a full range of construction chemical solutions, helping to protect structures throughout the world. Please refer to our brochures, which include: constructive solutions