Volume 16, Issue 5 (September 1988)
Additives for Bitumen in Road Construction
In India most all-weather roads have bituminous surfaces. Properties of bitumen depend upon its source and manufacturing process. Bituminous surfaces sometimes fail prematurely, however, the most common causes are the effect of water and variation in temperature.
In this paper an attempt has been made to document the effects of some additives on conventional properties of bitumen. These properties are penetration value, softening point, ductility, and stripping value. The additives are derived from plants. Various tests have been conducted on a mixture of 80/100 grade bitumen and different types and percentages of additives.
A detailed investigation has been carried out on five additives which have been code-named A, G, S, T, and W. The test results indicate a definite trend in the variation of the conventional physical properties of bitumen for Additives A, G, and W and a spectrum of values with finite variation in the conventional properties for Additives S and T.