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Roadbond is a chemical soil stabiliser and a compaction aid. When mixed with soils, it has the effect of reducing shrink/swell activity of expansive clays and enhances compaction of all types of construction materials.

 

The Roadbond molecule contains a hydrophyllic head and a hydrophobic tail. When mixed with soils, the hydrophyllic head attaches to the soil particles and coats them. The hydrophobic tail repels moisture away from the soil particle surface. This two-fold process is efficiently responsible for reducing shrink/swell activity in expansive clays. Construction materials treated with Roadbond can be re-worked without the need to add more Roadbond.

 

Engineers engaged in road construction and other major earth moving and construction projects such as airstrips, dams and industrial hardstandings, easily understand the cost and other advantages of using Roadbond.

 

Roadbond is only used on site after correct and comprehensive laboratory procedures have been carried out to determine dosage for optimum results in treating the soil being used for the road. Roadbond is environmentally friendly and is not detrimental to ground or sub-surface water. Roadbond has been shown to encourage the growth of grass on cut and fill banks.

 

Roadbond has been tested on a variety of construction materials and test results have shown that it works effectively on materials ranging from non-plastic to highly plastic soils.

 

Research and development continues with the object of providing users of Roadbond with a product and technical proficiency which is superior in all respects, as we continue building roads to build nations.

 

SUMMARY OF ROADBOND TEST RESULTS IN THE PROVINCE OF KWAZULU-NATAL, SOUTH AFRICA

Material	Road No. and Layer	Optimum Moisture Content(OMC)		Maximum Dry Density (MDD) kg/M3		Soaked CBR @ 100%Mod AASHTO
		Natural	Treated	Natural	Treated	Natural	Treated
Deeply Weathered Dolerite	Selected	15.9	15.2	1756	1823	18	74
			-4.40%		3.80%		311%
Weathered Dolerite	Base	9.3	8.7	2193	2217	37	64
			-6.45%		1.10%		73%
Sandstone	Base	11.8	9.1	1946	1987	15	51
			-22.90%		2.10%		240%
Khaki/Brown Shale	Base	8.7	8.1	2067	2113	43	59
			-6.89%		2.20%		37%
Weathered Dolerite	Base	10.8	10.3	2093	2119	49	69
			-4.63%		1.30%		41%
Decomposed Dolerite	Base	11.4	10.4	1959	2103	30	66
			-8.77%		7.40%		120%
Yellow/Brown Mudstone	Selected	11	10.2	1919	1969	17	36
			-7.27%		2.60%		112%
Red Silty Clay	Earthworks	16.2	15.9	1743	1829	10	26
			-1.85%		4.90%		160%
Yellow/Brown Mudstone	Base	14.4	12.9	1851	1934	9	37
			-10.42%		4.50%		311%

In every case, treatment with Roadbond increased the CBR and the Maximum Dry Density (MDD) and decreased the Optimum Moisture Content (OMC) of the materials tested.