摘要: |
India has large highways and road networks. The ideal bitumen should be strong enough, at high temperatures, to withstand rutting or permanent deformation, and soft enough to avoid excessive thermal stresses, at low pavement temperatures, and fatigue, at moderate temperatures. So it is important that properties of the bituminous binder should be improved by addition of the polymers or some other additives to improve the road performance. At present, modified bitumen has become popular due to its ability to reduce rutting at high temperatures and also reduce the occurrence of thermal cracking which generally takes place at low temperatures. This study mainly focuses on the improvement of the properties of modified bitumen by using various combinations of modifiers. In this study, rheological tests have been conducted on VG 10 grade bitumen and modified bitumen having various combinations of neat bitumen, polyethylene, SBS, EVA, and sulphur. It was found that sulphur increases the stability of modified bitumen storage and thus enhances the properties. At higher frequencies, SBS and sulphur combination provide better results. Although the study was conducted on Sulphur mixing with Polythene, SBS and EVA, but considering the limitation of paper length only effect of Sulphur on SBS has been considered in this paper. |