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BUILDING ROADS TO BUILD NATIONS

Welcome to Roadbond

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.andLayer

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
- 4.4%

1756

1823
+ 3.8%

18

74
+ 311%

Weathered Dolerite

 Base

9.3

8.7
- 6.45%

2193

2217
+ 1.1%

37

64
+
  73%

Sandstone

 Base

11.8

9.1
- 22.9%

1946

1987
+ 2.1%

15

51
+ 240%

Khaki/Brown Shale

 Base

8.7

8.1
- 6.89%

2067

2113
+ 2.2%

43

59
+
  37%

Weathered Dolerite

 Base

10.8

10.3
- 4.63%

2093

2119
+ 1.3%

49

69
+
  41%

Decomposed Dolerite

 Base

11.4

10.4
- 8.77%

1959

2103
+ 7.4 %

30

66
+ 120%

Yellow/Brown Mudstone

 Selected

11.0

10.2
- 7.27%

1919

1969
+ 2.6%

17

36
+ 112%

Red Silty Clay

 Earthworks

16.2

15.9
- 1.85%

1743

1829
+ 4.9%

10

26
+ 160%

Yellow/Brown Mudstone

 Base

14.4

12.9
- 10.42%

1851

1934
+ 4.5%

9

37
+ 311%

 Note:  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.

ADVANTAGES

 

 Reduced material borrow and hauling costs

Reduced deterioration rate of unpaved roads

Reduced maintenance requirements

Any surface layer can be applied on top of the Roadbond sub layer

 

MAJOR ROADWORKS

 

 Roadbond is effective in full scale roadworks as a compaction aid and stabiliser due to its particular ability to densify the soil forming a ‘stiffer’ and more impermeable layer.