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A clay mineral particle is very small and is made up by a number of sheets which can be compared to that of a book.

This “book nature” of the clay gives it an extremely large surface area which attracts metallic ions which themselves attract large quantities of water called ADSORBED WATER. Adsorbed water absorbs further water causing clay to expand and lose stability. The adsorbed water is strongly bonded to the clay surface and is not removed by sun-drying or oven-drying. It can be removed by chemicals which cause an ION EXCHANGE to take place. CON-AID does just this in clay soils.

CON-AID ions are complex molecules of two parts, a hydrophilic head and a hydrophobic tail.

These ions attach themselves to the clay surfaces which displace or lock in metallic ions and remove adsorbed water to make the clay hydrophobic and almost oily in effect.

The process of getting the CON-AID to all the clay in a soil needs time known as a green or maturation period. Immediately after application, very little improvement in the soil is observed, but at the end of maturation (2 to 4 weeks) the soil becomes hard & strong.

It should be noted that the presence of water is needed for the CON-AID to migrate to all the clay and a dry spell can retard the process, resulting in a prolonged maturation.

Road professionals are mainly concerned with the properties of the soil beneath the road structure. These soil properties, which influence the ability to support load, are determined by the presence of clay minerals. Swelling and shrinkage of clay due to interaction with water causes serious failure like cracking, rutting, depression and subsidence. The properties and behavior of clay in fact depends on the amount and type of constituent minerals.
CON-AID is an anionic synthetic thio compound, with surface active properties. It is specially manufactured, exclusively in South Africa, for the purpose of treating natural soils by improving the workability, density, and strength.
CON-AID is distributed worldwide, in plastic drums, each of which is marked with serial numbers for the purpose of reference and tracking.

Nature and Characteristics of CON-AID liquid soil Stabilizer:
CON-AID has the properties of a surfactant or surface agent. It transforms the hydrophilic (attraction of water) nature of the clayey material into hydrophobic (rejection of water) nature. The product is effective on soil particles that exhibit significant surface charges, such as clay particles with large specific areas.

  • Better particle-interlock means higher internal friction and improved bearing capacity.
  • It also means greater density and less penetration of water.
  • The effect of CON-AID on clay materials is permanent.

CON-AID will treat a wide spectrum of materials ranging from clays and silty sands to gravel. The materials must display some cohesive properties (i.e., contain clays).
Roads treated with CON-AID turn from mud surfaces into roads that are trafficable in wet weather. (See also Technical Information)

Environmental Factors:
Tests using CON-AID have been conducted by: CBR PLUS North America Inc., to Canadian Standards. The tests that were conducted incorporated hazardous ingredients, physical data, fire and explosion data, reactivity data, toxicological effects, preventative measures, first aid measures, and environmental effects.
Furthermore, the tests included sensitivity testing with rainbow trout, microtox and daphnia magnia, as well as leachate testing. All the tests confirmed that the product, in the diluted form at which it is applied, is non toxic and environmentally acceptable. It is also safe to be used near streams, due to its resistance to leaching and in farm or forest roads as it does not affect plants.
Other tests show that the product is non-flammable and non-corrosive to the equipment used for its application to the road.

PROPERTIES:
CON-AID has the following physic-chemical properties:

  • Totally water soluble with no solid residue.
  • Non-flammable.
  • Non-corrosive.
  • Non-Toxic and safe.
  • Environmentally safe and user friendly.

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