Latest technologies of highways

1. SOLUTION
POLY-MER STABILIZATION

2. Problems in road
o Deterioration of road (fatigue loading)
o Corrugation
o Potholes
o Rutting
All these factors suggest modifications to original soil-stabilization is
necessary in order to meet critical needs of pavements today
Question is
Uptill now, have we able to find any material that can alleviate these issues?

3. Why Poly-mer??
 Conventional soil-stabilization proved susceptible to sulphate
attack
 Proved inappropriate for clayey soils
 Containing excessive fines(>35% passing the no. 200 sieve)
 High plasticity(P.I.>10)
 Tests by renown laboratory, full-scale test pavements and in-
service pavements have confirmed the suitability of various
polymer products solution as a modifier.

4. HOW TO CARRY OUT STABILIZATION?
• Usually carry out in-situ
• Centralized processing plant

5. STABILIZATION TECHNIQUE
 Stabilization agent preserves strength of water susceptible gravels
by creating a hydrophobic soil matrix between the stones which
reduce permeability and limits water ingress(external water
proofing).
 Softening and lubricating effect of any moisture that does enter the
pavement is much reduced (internal water proofing)

6. How polymer modify soil-stabilization??
Increase modulus of elasticity through connecting cement coated
soil particles by numerous ‘micro-rubber bands’
Prevent penetration and capillary rise of water within soil
stabilization.

7. Poly-mer compatibility measures
Polymer should be;
 Water based
 Non-toxic
 Non-flammable
 Economically preventive or EPA compliant

8. Comparison
• Traditional Road Design Polymer Stabilized Road

9. Key benefits
 Fatigue crack reduction
 Shrinkage crack reduction
 Water proofing
 Increase compressive strength
 Increased tensile strength
 Increased resilient modulus
 Long life

10. Key benefits
 Following are some of its benefits;
 Reduce the need of bitumen by around 10%
 Substantial reduction in construction time
 Significant reduction in material
 Efficient and rapid construction
 Environmentally sound
 Reduces susceptibility to water
 Long life