SoilTech Mk. III Polymer Stabilizer Saves Significant Road Construction Cost
South Africa-based Polyroads distributes its entire range of Smart Materials, including its flagship SoilTech Mk. III stabilizer for road construction, through local partner Kaveri Ultra Polymers in India
SoilTech Mk. III is a third generation nano polymer binder used for stabilizing soil and improving its strength and, thereby, the road’s stability. It was specifically developed for mine haulroad stabilization, where excessive loading occurs and where all-weather roads are required. This technology is now used in commercial road design.
SoilTech Mk. III stabilizing polymers are elastomers that gain strength from mechanical compaction and do not become brittle when cured. The elastomers are flexible in nature and allow certain amount of flex under load, and do not become brittle unlike cement stabilization. They do not crack under excessive loading, an aspect that reduces layer work in design phases. In most cases, the soil in the area can be used for stabilization. Insitu materials, which would normally be classified as unusable or waste materials, can be transformed into suitably modified aggregates for use in base and subbase layer construction.
SoilTech Polymers are at the forefront of binding marginal soils and turning these materials into useable road construction aggregates. The product has been tested with in- situ materials in various parts of the world, and extensively utilized in base and sub-base stabilization. Designed to penetrate the road’s base layer and into the sub-base layer via capillary action and bind the loose particles to one another, it provides strength and cohesion.
The nano polymers are 0.5µm in size and are far more effective in coating and binding aggregates. When mixed with water, they act as a means of transport and facilitate the polymer in coating the soil particles. Once the water disperses, the polymers interlock and form a bond which gains strength under mechanical compaction. The greater the compaction, the better the binding.
Stabilized roads are opened to traffic 24 hours after construction. The kneading effect of vehicle traffic further accelerates the evaporation process of the surfactants and coalescing solutions surrounding the polymer chains. The polymers start binding when exposed to air and the surfactant (aided by an alcohol mix) starts to evaporate.