RnM brochure

1. Specialized
Engineering &Construction Company

2. 1

3. ABOUT US
R & M International Pvt Ltd is leading We are dedicated and a centre of attention for:
Specialised Engineering and Construction
Company. We are a rapidly growing solution • Structural Strengthening
provider for Improvement/protection/repair Increasing the axial and flexural strength of
of concrete/structures in India. Seeing the the structural members. So that they are able
current growth and revamping of total Indian to meet up the design requirements.
infrastructure market which includes Railways,
Airports, Roads, Bridges, Hydro Power, the • Base Isolation
company plans to start offices across major cities The integrity of a structure can be protected
and to have a business relationship with various from the attack of severe earthquakes either
international organizations. We bound to meet through the concept of resistance or isolation.
up the client requirements due to which we were In designing a structure by resistance, all the
able to grow consistently over the past few years. members of a structure are designed with
sufficient size to take the load elastically and
allowed to undergo in the inelastic range with
sufficient ductility. Such approach can prevent
the collapse of the structure but not the
damage i.e. the structure rendered to be unsafe
after earthquake.
• Water proofing
Membranes made of bituminous material
provides good water-proofing to roofs and
terraces. Also Specialized waterproofing
chemicals with nano compounds in it
enhances the efficacy of certain chemicals in
waterproofing applications.
2

4. PRODUCTS
R&M G-Fiber BD-80
Glass fibre is made by weaving fibreglass
together to give it a cloth or a fabric shape.
The type of fiberglass used are mainly E-glass
(alumina borosilicate glass). FRP sheets are
wrapped around the columns, with fibers
oriented perpendicular to the longitudinal axis R&M C-Fiber UD-300
of column, and are fixed to the column using Carbon fiber (CF), is a material consisting of
epoxy resin. They provide Ductility Enhancement, extremely thin fibers about 0.005–0.010 mm
seismic strengthening and junction confinement in diameter. These threads are then weaved
together to form a sheet fabric.
Areas of Application
•Flexural enhancement (low quality of substrate)
•Axial load enhancement of columns
•Placement of stirrups in columns
They have the following advantages over
conventional materials.
•Dimentionally stable
•Moisture Resistance
•High Strength
•Fire Resistance
•Chemical Resistance Properties
•Very high strength to weight ratio higher than
even glass fibers
•Dimensionally stable
•Moisture resistance
Testing
•Tesile Strength ASTM D-3039-93
•Pull-off test
3

5. PRODUCTS
R&M Carbon Fiber Laminates
Carbon laminate is a stiff composite plate use to
enhance the flexural and moment enhancement
for structure.
Various thickness and width are
(10,20,50,80,100) and (1.2,1.4) respectively. Any
combination can be choosed. R&M Matrix 20 Base,
Used in Pre-Stressed System for following
•Flexural enhancement for slab and beam Hardener
•Diagonal bracing for brick wall Fiber Composite Resin is a two component
•Shear wall enhancement system and the primary functions of the resin
•Moment enhancement in tall structure are to transfer stress between the reinforcing
•Deflection recovery system fibers, act as a glue to hold the fibers together,
and protect the fibers from mechanical and
environmental damage.
Areas of Application
•Composite FRP system
•Concrete and masonry surface imperfections
•Filling pinholes prior to over coating
•Sealing of surface cracks and General fair facing
over large areas
Used in non-PreStressed System for following
•Flexural enhancement for slab and beam
•Diagonal bracing for brick wall
•Shear wall enhancement
•Moment enhancement in tall structure
Properties
•Hiigh modulus carbon – tensile strength- 2900
•MPa, E-Modulus- 210
•Corrosion resistant and doesn’t absorb moisture. Packing of 5 kgs including base and hardener
Packaging Tests done
Rolls of 100 m, 150 m, or cut to size. an Flexural strength test, and tensile strength test.
unwinding reel is available upon request. Special
dimension upon Request
Tests recommended
•Tensile strength test as per ASTM D-3039-93
•Pull off test to check the bond with substrata
4

6. PRODUCTS
R&M Resin Primer 11 Base, Hardener
R & M Nano-proof-51
A single component emulsion which is
NANO enhanced, Waterborne, Economical,
ECOFRIENDLY, User-friendly (nil minerals) and
is having multiple applications. It Very well
compatible with Cement. It is also UV resistant. EPDM Water proofing Membranes
It is easy to use and very well suited for internal Membranes made of bituminous material
and external building applications. roofs, terraces provides good water-proofing to roofs, terraces
and chajja’s are the main areas of application. and other large areas of applications.
R & M Nanopoxy-23/75 R & M WaterRepell
It is a 2K waterborne ECONOMIC, User-friendly, DL-WR is a Single Component Coating which
ECOFRIENDLY, Flexible Epoxy Composition, is Economical, Ecofriendly, Waterborne,
enhanced with NANO and other performance Nonflammable, Water and Oil Repellent. It is
additives. It is used with either white or grey applied on Porous surfaces like Plaster, Concrete,
cement and has very good compatibility with Paper, Wood, Bricks, Stones, Fabrics, Cardboards,
Cement. It is a heavy duty compound and is Asbestos cement sheets, Gypsum Boards, POP,
very well suited for swimming pools, podiums etc. DL-WR is Transparent which results into
gardens like areas. performance water and oil repellent surface. It is
ready to use by brush or spray application.
R & M Integral-Waterproof
Integral Water-Proofing liquid Compound for R & M Bondagent
Plaster and Concrete. It gives concrete improved Dl-BA is a very flexible polymer based bonding
cohesion and acts as a plasticizer. agent having tack for strong bond between old
and new cementitious substrates. DL-BA finds
R & M Rust-Killer extensive use as a bonding aid for new and old
This Coating is a liquid formulation which is concrete / mortar. Also applicable for bonding
non-acidic, water borne, eco-friendly, non- brick slips, tiles, stones, wall cappings, repointing
flammable, user-friendly rust inhibitive type brick work and for protection of concrete from
Rust Killer. It has excellent use as reinforcement dampness.
coating during rehabilitation of old structures.
R & M Water-Retardant
DL - RET is a water reducing and retarding
admixture for concrete. It is a special
performance admixture for RMC plants. It helps
in achieving increased workability in all grades
of concrete, increased compressive strength
at economical dosage and better retention of
slump values.
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7. PRODUCTS
R & M ModPoxy ST
It is a corrosion resistant coating for structural
steel and processing vessels’ exteriors. Excellent
water resistance. Exhibits excellent performance
in industrial and marine environments subject to
acids, alkalis, solvents, salts and other aggressive
exposure. R & M Nano-Coat-505
DL -505 is an excellent modified acrylic Resin
R & M ModPoxy SP Emulsion enhanced with NANO additives (for
Specially formulated epoxy mastic that is high better adhesion) based waterborne masonry
build and surface tolerant. It is recommended as paint for concrete substrates. It is a Single
a maintenance coating with suitable top coats. component, ECOFRIENDLY, user-friendly, high
The product is suitable for application on steel performance paint with anti carbonation
as well as concrete surfaces. properties. It also finds extensive use in painting
It is recommended in fertilizer, chemical, refinery, and coating of core infrastructures like bridges,
petrochemicals, bridges, marine installations, dams, skywalks, etc.
pulp and paper, pharma industries. Modpoxy SP DL505 is also recommended for steel structures
–N is nano ceramic modified variant which has in chemical industry over a suitable primed
still better chemical resistance and adhesion. surface.
R & M SiliCoat
R & M Nano-Coat-145
It is an excellent Exterior Silicone Resin
Nanocoat- 145 is a waterborne coating for Emulsion based waterborne paint that also
superior performance, particularly as an excellent performs Water-Proofing. It is Single component,
Anti Corrosive coating for difficult substrates like ECOFRIENDLY, userfriendly, high performance
COPPER, ALUMINIUM, ZINC, etc. It can be used as paint known for very high durability. It is applied
top clear coat for variety of substrates, including on cementitious (concrete, plaster etc.) surfaces.
certain plastics like Poly Carbonate and on Road
marking paint.
R & M PU-Aliphatic
R & M Fire-EPON Two pack acrylic polyol and aliphatic isocyanate
Fire-EPON is a 2K Fire retardant EPOXY COATING based top coat with good chemical resistance
enhanced with NANO and other performance and weatherability. It is recommended for
additives. It offers excellent chemical and application on suitaby primed surfaces of
corrosion resistance. structural steelwork, vessels, pipelines, etc in
fertilizer, chemical, refineries, petrochemical
plants which are exposed to corrosive
environment. It is recommended for core
infrastructure like bridges, skywalks, canals, etc.
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8. PRODUCTS
R&M Resin Primer 11 Base,
Hardener
Primer is the concrete bonding adhesive for
use with the Composite Strengthening System.
It is a 100% solids low viscosity epoxy resin
able to cure in the presence of moisture and
at temperatures as Low as 20C. When applied
to sound concrete Composite primer gives
high tensile bond strength to the Composite
Strengthening system. R&M Non-Prestress Anchor
Plates
Aluminum alloy plate which is specially
designed and manufactured for anchoring the
Non-PreStressed C-Fiber Laminate at the ends so
that the laminate does not peel off from ends.
Application area
•For concrete surface smoothening
•To remove any unevenness putty made with
adding R&M aggregate into it.
Test recommended
•Compression, Tensile and Flexural strength test
as per IS 4456 Part-I
•Pull off test to check the bond with substrata
7

9. PRODUCTS
R&M Laminate Adhesive
20/30 Base, hardner
Laminate Adhesive is a two component mixture
specifically made for bonding Carbon-Fiber (CFK)
Laminate to the concrete. It is applied to the
laminate which is then bonded to the concrete.
It is viscous and gains tackiness in half an hour
which makes it an excellent adhesion material.
Aplication area
R&M Aggregate
White Cement which is used to prepare
•In Non- PreStress and Pre-Stressing of Carbon-
Putty when mixed with adhesive or Primer in
Fiber Laminates
proportionate amount.
It is used to fill gaps and even the uneven
surface.
•To remove any unevenness putty made with
adding R&M aggregate into it.
Tests Recommended
•Tensile and Flextural tests as per IS 4456
•Pull off test for bonding strength
8

10. SERVICES
Fiber Wrapping
A Fiber Reinforced Polymer (FRP) composite
is defined as a polymer (plastic) matrix, either
thermoset or thermoplastic, that is reinforced
(combined) with a fibre or other reinforcing
material with a sufficient aspect ratio(length to Application Method
thickness) to provide a discernable reinforcing •Surface Preparation
function in one or more directions. Surface is chipped to remove all loose concrete.
There are several situations in which a civil Major cracks are injected with epoxy mortar &
structure would require strengthening or corroded steel is treated with Anti- corrosion
rehabilitation due to lack of strength, stiffness, treatment. The surface is then re-profiled. Any
ductility and durability. Some common situations surface irregularities are removed.
where a structure needs strengthening during its •Primer Coat
lifespan are A low viscosity epoxy primer is applied with a
brush to promote adhesion between FRP and
concrete surface.
•Surface Leveling
After primer application the surface is checked
again for local irregularities and unevenness.
This is then filled with putty to make it even.
•Fiber Application
Fiber is cut to measured length. In large
projects fiber is saturated with epoxy using
wet- layup machine and applied to surface. For
shorter lengths the epoxy is applied manually
and then applied to surface. Rollers are used to
remove any bubbles formed and make the fiber
adhere to the surface properly.
•Seismic retrofit according to current code •Anchoring fiber wraps
requirements. Fiber anchors are put in the drilled area where
•Upgraded loading requirements; damage by the fiber wrap overlaps so that it does not peel
accidents and environmental conditions. or loosen up from ends.
•Initial design flaws •Quality assurance
•Change of usage. During curing time, the fabric is checked
Design regularly for any irregularities or bubbles which
Complete design of strengthening by using FRP are removed.
composites are performed as per ACI (ACI110R), •Finishing
Euro Code (Ec8), CEB – FIP (Bulletin14) and After curing a second coat of epoxy adhesive is
Japanese (JBDPA) guidelines. applied and sand sprinkling is done to make it
Testing rough so that plastering can be done to keep
Cube Testing is done extensively over cylindrical the fiber wrap system enclosed and has a long
and rectangular cubes with fiber wrapped system life.
and they show improved enhancement in their
flextural and compressive strengths.
For bonding strength of fiber wrap Pull-Off test
is recommended which ensures the efficacy of
fiber wrapping.
9

11. SERVICES
Pre-Stressing
The pre- stressing of Carbon-Fiber laminate is
a very effective way of using the high Tensile
Application Method
strength property to much greater extend.
•Surface Preparation and marking
External prestressing with other materials of the
Surface is well grinded to make clean &
existing structures have always been difficult
even so that marking can be done easily and
especially in view of the materials to be used,
adhesive bonds strongly to the concrete. After
reinforcement corrosion, lateral instability, end
which marking of laminate positions and
anchorages and ofcourse space constraints.
marking of plate , machine area is done.
The advantages of resistance to corrosion and
•Drilling and bolting
high specific strength make these materials ideal
After Marking, holes are drilled as per marking
for reinforcing existing structures with minimum
and High-Tension bolts are inserted for plate
intrusion. Popular method adopted is bonding
and clamp to be fixed. This should be perfect
them adhesively to concrete structures.
and very little error is allowed.
•Fixing of clamping device and alignment check
First the clamping device is fixed just behind
the plate area in the machine area with the
help of L- Clamps.
•Final Alignment check and fixing of laminate
Piston body and plate anre fixed and checked
for alignment. After which the laminate is
cut to the measured length and fixed in the
clamping device at both ends. Plate and the
piston body is fixed for process to start.
The Company has developed a system which
•Pre-Stressing
easily and effectively makes it possible to Stress
The laminate is stretched according to the
the carbon laminate to a designed load and bond
design requirements and is pre-determined.
it adhesively to the existing structure to transfer
After sufficient load is given the adhesive
the load on itself to support the structure.
is replenished between the laminate and
Applications
concrete surface also the gaps which were
Restoring the Beam and slab load carrying
developed after stretching are filled with
capacity and also giving it more strength.
additional adhesive.
RCC members strengthening.
•Dismantling of Pre-Stress Machinery
Finally after applying pressure the laminate
is kept in the stretched position for a day
with the help of stoppers. This is done for
the adhesive to get cured and hard. Hence,
the laminate becomes active i.e. it starts
supporting the structure(Beam and Slab) by
giving a upward force to it.
10

12. SERVICES
NonPrestressing
Pre-Cured Carbon Fiber composites in the form Application Method
of laminates, more popularly known as CFK •Surface Preparation and Marking
laminates, is a new material used for external Surface is very well grinded to Level the
strengthening and retrofitting of RCC members. surface and make it clean. After which Marking
As laminates they have a very high tensile of laminate and plates are done for proper
strength to weight ratio, around 8-9 times of positioning of laminate. If required Grooving
steel, which makes it a very suitable material for is also done in cases of uneven surface or in
providing extra strength and hence increasing case of laminates in both direction where
the load bearing capacity of members. overlapping Is happening.
The most common form is Non Pre-Stressed •Preparation of end anchorage
laminates mounted on the surface of concrete. To fix the laminates at ends either a groove of
It increases the shear resistance and flexural 50 mm is prepared in the side wall or anchor
strength. This near surface mounted technique plates are fixed at the ends. in case of fixing
is based on fixing, by epoxy adhesive , CFK anchor plates, drilling and bolting of high
laminates into pre-cut slits opened in the tension bolts is done in the plate area.
concrete cover of the lateral surface of beams •Cutting of laminate
and slabs. In a clean area away from the resins, the
When more load is applied on the member slab laminate is carefully measured and cut
or beam the laminates become active and share according to the length required. After which a
the load on themselves. Hence increasing the layer of adhesive is prepared over the laminate
load which the member can take. for fixing it with surface.
At the ends of laminate anchor plates, called •Fixing of laminate
non Pre-Stressing Plates, are fixed with help of After putting adhesive on the laminate it is
adhesive so that the laminates does not peel off fixed on the surface and the ends are either
the concrete surface in future. put inside the groove prepared or anchor
plates are fixed. Pressure is applied with the
help of Rollers so that it is properly stretched
and pasted on the grinded surface with good
bonding.
Testing •Finishing operation on fixed laminates
Tensile testing of the laminates according to The sides of laminate are covered from both
ASTM standards for their load bearing capacity. sides with more Adhesive to replenish the
Pull-Off test for the bonding strength of adhesive fallen through while carrying out the
adhesive and its efficacy to transfer the loads. process.
11

13. SERVICES
Grooved Laminate
System
Often there are cases in which a rectangular Pre-stressing Systems
column has an aspect ratio greater than 3 i.e. •Surface Preparation and marking
the longer side dimension is more than three Surface is very well grinded with grinding
times the dimension of that of the shorter side. machine to make it smooth and easy to work
It has been proved that fiber wrapping is most on. parallel lines marking on the surface as per
effective with circular column and is less with the length of laminate in equal spacing as per
square and even lesser in rectangular columns. the design.
This reduction in effectiveness of fiber wrap •Grooving
increases with the aspect ratio. For round Columns Grooves are done on the
The square and rectangular columns are to be marked area to the depth specified in design.
given a curvature at the edges. This is done so It is done keeping the width and thickness of
that the confinement is effective which sharp laminates in mind. For rectangular columns
edges reduce. In case of rectangular columns Each face of the column is marked according to
confinement is further reduced due to different its width. It is then grooved to depth specified
side lengths. If the aspect ratio is very high the in design.
column does not show any effect of increase in •Primer Application and finishing
load carrying capacity achieved by confinement. Adhesion between the fiber wrap and the
This effect is taken care by partitioning the column, and also to alienate the the fiber wrap,
longer side into parts so that it behaves like a a low viscosity Epoxy Primer is applied with
square column and give good confinement. The a roller until the column surface is locally
carbon fiber Laminates are put in grooved spaces saturated. The bad and uneven sectors are
which are 25-40 mm deep depending on what is corrected and leveled with the help of putty.
desirable. •Cutting and fixing of laminate
This laminates which are grooved and put inside In a clean area away from any chemical, the
the column also give extra strength in terms of laminate is carefully measured and cut to
shear failures. the required length. Adhesive is applied on
both sides of the laminate it is inserted inside
the groove and is further pushed properly by
rollers.
•Finishing
Finally after inserting Laminates the column
is further confined by means of fiber wrapping
system throughout the length including
junctions.
12

14. SERVICES
Column Pre-Stressing
It is an innovative technique for retrofitting
of columns and joints of a RCC structure. It
involves confining of column with Carbon/
Epoxy or Aramid/ Epoxy composites. Moreover
these confinement belts are Pre-Stressed before •Primer Application
application which changes a lot of things as Primer is applied to increase the adhesion
compared to traditional confinement with Fiber and alienate the fiber wrap from the concrete
Wrapping. moisture. It also makes the surface smooth and
This Pre-Stressing has a lot of added advantages. easy to work on.
Pre-Stressing allows us to use the Superior •Fiber Application
Properties of FRP composites to a much greater This step is crucial as it fulfils the importance
extent. The difference lies in Active Confinement of previous prepration steps. It involves fitting
and Passive Confinement. Active Confinement is of machine and clamping of Fiber wrap with
done by confineing the column by pre-stressed it. Hydraulic jack is attached to stress the Fiber
FRP composites. Which starts taking loads Wrap composite. Pressure is applied through
while there is no extra load given to column. hydraulic jack attached manually. The fiber is
On the other hand Non-Stressed FRP composite stressed to the retrofit design load .
becomes active i.e. takes load only when extra •Curing and Quality control
load is being applied on to the column. For the next 24 hours the fiber is kept in the
Active confinement is very useful for seismic stretched position with the help of stoppers
retrofitting apart from other strengthening attached to the machine. Column is then
properties. constantly monitored for any misformation or
undesirable behaviour.
•Anchor placement and finishing
Fiber Anchors, specially designed to lock the
overlapping area which completely removes
any possibility of fiber to peel off the column,
are put in the previously drilled holes and
Application Method fixed using the Epoxy Saturant. Finally one
•Surface Preparation more layer of epoxy is applied and then sand
Surface is well Grinded to remove any is sprinkled so that the system is permanently
unevenness and local/sharp undulations. preserved inside and plastering done.
This is done to promote easy application and
adhesion of primer. An innovative technique and machinery for
•Marking retrofitting of columns and joints of a RCC
After Grinding Marking of of machine area structure have been developed by us. It involves
which clamps the fiber and pre-stress it. It confining of column with Carbon/Epoxy or
is crucial for proper fitting of machine and Aramid/ Epoxy Composite-Belts and Pre-
hydraulic jack, to perform stressing of the Stressing it so that it confines the column in
composite while application and to hold it stressed position. This is new and exclusive
in pre-stressed state till it is cured and load technique which enhances the capability of FRP
transfer has happened to confine the columns.
13

15. SERVICES
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12

16. SITES
Reliance Special Economic
Zone (NMSEZ), Navi Mumbai
A change in usage of a 9 storied building
required the beams to be strengthened. More
than 200 beams are to be strengthened in each
building to achieve desired result. A full design
of Strengthening was proposed which is now
undergoing.
The strengthening is done using carbon
fibre laminates and composite fibre wraping
system. Also composite rods are also used for
strengthening.
Column Strength Enhancement
Fiber wraping of columns, and grooved laminate.
15

17. SITES
Flyover, National Highway 7,
Bangaluru
At the National Highway 7 (NH 7) between
Bangalore and Hyderabad two Flyovers had
shown Live cracks in the slab. Which were
confirmed by testings carried out. They skew
box slabs were then strengthened by External
strengthening by non- prestress and Pre-stress
technology using Cabon Cimposite Laminates
in both the directions forming a grid of Carbon
Fiber laminates.
16

18. SITES
JNPT, Navi Mumbai
Turnkey Project
Only Transportaion Bridge Between JNPT and
cities. Due to extensive movement of Heavily
loaded cargo verhicles in the past 12 years
the bridge has lost its all strength and started
heavily vibrating causing a threat of collapse.
Turkey Project involved Strength enhancement
of the spans
Epoxy Grouting, Steel girders installation,
replacement of almost all damaged Bearings,
enhancement of girders by external Pre-stressing
and non-prestressing using carbon fiber laminate
and Carbon- Fiber wrapping system.
17

19. SITES
HPCL, Mumbai
Turnkey project
The PDA Structure, which supports the various
accessories of the oil refining, had its columns
and beams showing serious cracks and
reinforcing steel corrosion.
Complete repairs and retrofitting of Beams and
columns of the PDA structures
Structural members are repaired and
strengthened by epoxy modified Epoxy Modified
Mortar, Cement grouting, Epoxy Grouting and
confinement through fiber wrapping system.
18

20. SITES
Other Projects
•Mhape Gulraj Hotel
•Universal Hotel Airlink
•Sun-n-Sand Hotel, Indu Projects
•Manthan Plaza, Vakola
•ADPL Hotels
•Sheffields Towers
•Platina Wadhwa complex, Mumbai
•ECCI Park, Chennai
•CCCL, Chennai
•Llyod Hotel
•Syndicate Bank, Mumbai
•SP Info-City, Chennai
•ESIC Hospital
•IIT Madras
•Rashtryia Chemical and fertilizers, Chembur
•Chatrapati Shivaji International Airport, Mumbai
•Bangalore International Airport
•Amba Bhavani Temple
•Private bunglow, Mysore
•Oberai Mall, Goregaon
•Neelyog Square Mall, Aditya Ventures
19

21. 20

22. CONFERENCES
WSRR
Workshop on Rehab and retro of structures
28th 30 August
This workshop aimed at creating a clear
understanding among participants on the
complete process of investigation, repair,
strengthening and rehablitation of reinforced FICCI
concrete buildings and infrastructure. Knowledge Partner
Organized at IIT Bombay WSRR had a FICCI jointly with Dept of Chemicals &
participation of more than 200 people from Petrochemicals, Govt. of India and R&M
industry and educational institutions. A total International as the knowledge partner
of 30 papers spanning over all Structural organized “International Conference on
Rehabilitation fields, were presented in WSRR. Construction Chemicals” on February 11-12, 2010
at Hall of Culture, Nehru Centre, Worli, Mumbai.
The aim of the conference was to discuss the
challenges, market opportunities, advance case
studies, strategic tie-ups and technology transfer
in the construction chemicals.
The key people participating spanned among
Manufacturers Consultants, Architects Engineers,
Contractors Traders, Marketing professionals
Builders & Supliers.
AaKar, IIT Bombay
A platform for young Civil Engineering students
to present their new research findings to a
distinguished panel of Professors from our
Department. More than 100 entries were recived
in the event and A journal was published by IIT
Bombay with the winning entries.
It had lectures conducted by Speakers from
BARC, Central Water Resources and Power
Research Station, ACC, ENSOFT and it was a good
platform for students in civil engineering to
interact with industry.
21

23. LECTURES
IEI lecture
The Institution of Engineers (India), Maharashtra
State Lectures on “Innovations in Tall Buildings:
Structural Systems” & “The 90 Day Crisis in
Manhattan: The Tale of Teetering tower” by
Mr.Ravindra Mysore, President, LeMessurirer Lecture Series at VJTI,Mumbai
Consultants, USA on Friday, October 30, 2009 A development course on “Structural Audit
and Rehabilitation of Buildings” was held at
VJTI, Mumbai. The lectures were on Structural
Lecture Series, IIT Bombay Deterioration, Structural Audit, NDT, Structural
A series of lecture on Performance-Based Rehabilitation, Heritage structure Protection and
Seismic Design (PBSD) by Subhash C. Goel, Seismic Retrofitting of Buildings. The lectures
Professor Emeritus, Department of Civil were given by well known experts in the
and Environmental Engineering, University of industrial and the Academia space.
Michigan, Ann Arbor, MI, USA was organized
successfully on 29th Jan 2009.
Lecture Series at VJTI,Mumbai
A development course on “Structural Audit
Lecture on Grand Pagoda and Rehabilitation of Buildings” was held at
Grand Pagoda which was considered for VJTI, Mumbai. The lectures were on Structural
construction with massive span of 85 meter Deterioration, Structural Audit, NDT, Structural
and seating capacity of 10000 persons keeping Rehabilitation, Heritage structure Protection and
in mind the aesthetics and long lasting of Seismic Retrofitting of Buildings. The lectures
masonory structures. The lead of designing were given by well known experts in the
team, Mr. Mahesh Varma and Proof checking industrial and the Academia space.
consultant Prof. R.S. Jangid (Professor, IIT
Bombay) shared their design and execution
experience during the lecture conducted.
22

24. RESEARCH
CPRI, Bangalore
Reactor Safety Division (RSD), BARC along
with Central Power Research Institute (CPRI)
Bangalore conducted a round robin exercise and
theme meeting on pushover test on prototype
Reinforced Concrete structure at CPRI Bangalore.
The test was Asia’s largest pushover test and was IIT Bombay,
one of its kind. The structure built was a replica
of a substructure of an existing office building at A Masters project
BARC. The structure was tested till failure in the A project for fire and heat resistance for Glass
tower testing facility present in CPRI. fiber reinforced polymer on structural members
This structure was then repaired and retrofitted was studied and ways to enhance it were found.
using Fiber Reinforced Polymer Composites It was found that a coat of vermaceal gives a
(FRPC). The institutes/organizations who retention time against fire much higher than a
participated in the second phase of the exercise plastered FRP.
included, BARC, NPCIL, DCS&EM, IIT Bombay, IISc All the materials and technical support in
Bangalore, CPRI Bangalore, SERC Chennai, Thapar collaboration with IIT Bombay professors was
Institute of Technology Patiyala, UVCE Bangalore, provided. This project successfully developed a
IIIT Hyderabad, SIT Tumkur and PSN College of system for making G-FRP resistant to fire for a
Engineering Tirunelveli, Sardar Patel College of much longer time so that it does not loose its
Engineering, Mumbai. All the Materials used and stresngth and hence the structure becomes more
fibre wrapping on the structure was taken care resistance to fire damages.
by R&M International at the site.
In order to evaluate the fundamental frequency
of the structure in the two directions, before Seismic Ability of FRP
commencing the pushover test, a free vibration BARC, Mumbai
test was conducted for the retrofitted structure. The failure of structures due to recent
Highly sensitive accelerometers were placed earthquakes has exposed the vulnerability of
at different floors to pick up the vibration structures to the seismic forces. Hence seismic
signal generated by the blow of a hammer. Fast retrofitting has come out as an important area
Fourier Transform (FFT) of the signal gave the for Research.
information on the fundamental frequency of the At BARC, Mumbai under Dr. G.R. Reddy. Fiber
structure. wrapping has come up as an promising way of
The conclusions involved the effect of fiber retrofitting structures for earthquake resistance.
wrapping on the structure. The fundamental Tests were carried out on a structure
frequency determination of the structure after strengthened by fiber wrapping. Earthquake
rehabilitation with fiber wrapping and before Conditions were simulated and tested for
pushover test in two directions were also carried earthquake resistance of fiber wrapping.
out. The testing gave a insight about earthquake
resistance of rehabilitation with fiber wrap and
also it was shown that almost 100% of strength
was gained back by Fiber wrapping on the
damaged structure.
23

25. REASEARCH
JNPT
In collaboration with Sardar Patel college of
Engineering, tests and instrumentation was
carried out in the three spans of the JNPT bridge
at Karal. Different NDT tests were carried out
and sensors were installed at various loacations
to asses effect of rehabilitation. Following is the MIAL
detail For Showing the effectiveness of the
•NDT tests consisted of Rebound Hammer test techniques and materials used at the Chatrapati
and Ultrasonic Pulse Velocity test to assess the International Airport tests were carried out. They
quality and durability of concrete present. were follows
•Measurement of deflection using linear •Pull of tests of carbon Fiber wrap and carbon
Potentiometers mounted at the center of bridge fiber laminate to check its bonding strength and
at the bottom face. hence the efficacy of load transfer.
•Measurement of Flexural Strains and shear •Beam test of fiber wrapped beam which gave a
strains with foil type strain gauges mounted at much higher flexural strength.
centre of girder at bottom face and at the end at •Reinforcement in cube and testing its bond
an angle of 45 deg. strength with the concrete.
•Measurement of change in crack-width using
omega type displacement transducers. Which
were tested on full capacity loading. SPCE, Mumbait
•Measurement of vibrations before and after We have been associated with Sardar Patel
strengthening by piezoelectric accelerometer College of Enginnering and have carried out alot
and full load moving truck to induce vibration of testings and Research work for our products
according to IS codes. and services which are proof-checked by experts
The results have shown reduction in strains at college.
and vibrations hence showing the effect of All the materials including fibers, laminates
strengthening. matrix, Primer, adhesive etc have been tested for
their properties and application methods.
IIT Madras The company has been involved in constantly
upgrading its products and service by doing
All types of fibers were studied for their
research related to it at the college. Beam
effectiveness in confining by fiber-wrapping
testing, cube testing, flexural test, tensile tests,
technique. This was a comprehensive study
bonding strength tests etc are carried out
which involved testing various variants of
over our serviced structure for the improving
fibers with their thickness and number of layers
effectiveness of our services and constant
varying.
upgradation.
For achieving the objective different cube
A new epoxy was developed and tested
samples were prepared. These samples were
at college with the help of Dooall corpro
then tested for compresive and flexural strength.
construction chemicals for its breathable
The results gave us the capabilities and
nature which actually increases breathability
limitations of our services so that it can be
of concrete and makes the fiber wrapped
further developed and used for betterment of
structure more Durable. The product is still
the technique.
under development phase and is undergoing
upgradation and changes to be used at site.
24

26. CLIENTS
25

27. GROUP OF COMPANIES
21 SHM Consultants
SHM stands for Structural Health Monitoring.
The vision of 21 SHM Consultants is to provide
intelligent Structural solutions for monitoring
structural behaviour in long and short term. We
are involved in monitoring of Bridges, Dams,
Buildings, Tunnels and other structures. Our
IK Industries
We are involved
services include in manufacturing
•Structural Health Monitoring and distribution
- Sensors placement of Construction
- Data Acquisition Chemicals and other
- Modal Analysis civil engineering
- Long term Monitoring industry products for
- Short term Monitoring Waterproofing
compounds.
•Structural Consulting For terrace, podiums.
- Structural Audit Paints, Coatings for steel and Concrete.
- Structural Analysis Anchor plates, fibre sheets.
- Structural Proofchecking
- Quality Assurance
•Concrete Non Destructive Testing
26

28. Contact Us
R & M International Pvt Ltd
Office Address: C-2098/99, Oberoi Garden Estate,
Off. Chandivali Farm Road, Andheri(E), Mumbai - 400 072
Tel: +91 22 2857 7810 - 11
Fax: +91 22 2857 7812
Email: info@rminternational.co.in