Abstract
The mechanical properties of a sand/sulphur/bitumen mix comprising 80 per cent dune sand, 15 per cent sulphur and 5 per cent bitumen have been measured over a temperature range of 4-60 degrees c and under stresses up to 900 kn/sq m. The fatigue properties and the tensile and flexural strength were found to be at least as good as high quality asphaltic concrete and the deformation properties, both static and dynamic, were found to be far superior. Deformation models were derived relating permanent strain to temperature, stress, pavement layer thickness, subgrade dynamic modulus and number of stress repetitions. (Author/publisher)