废橡胶粉改性沥青性能试验研究.pdf

收稿日期:2014—07—04作者简介:贾宏伟(1976—),男,山东东营人,工程师,研究方向为公路桥梁工程的勘察设计。废橡胶粉改性沥青性能试验研究贾宏伟,王成军(东营市公路勘察设计院,山东东营 257091)摘要:通过试验研究了废橡胶粉改性沥青的性能。试验结果表明:沥青经过废橡胶粉改性后,针入度有显著降低现象,软化点最高提高了 20℃多,旋转粘度值显著提高,延度较小;随着废橡胶粉掺量的增加,废橡胶粉改性沥青的针入度、软化点、延度和弹性恢复值均有增大的趋势,但当废橡胶粉掺量较大时,弹性恢复值的增大趋势不明显;随着废橡胶粉目数的增加,废橡胶粉改性沥青的针入度和软化点变化并不规律,延度和弹性恢复值均有增大的趋势,但当废橡胶粉掺量较大时,弹性恢复值的增大趋势亦不明显。关键词:废橡胶粉;改性沥青;性能中图分类号:U414 文献标识码:AExperimental study of the performanceof asphalt modified by wastedrubber powderJIA Hong -wei, WANG Cheng -jun(Dongying Highway Survey and Design Institute,ShandongDongying 257091 China)Abstract:The performance of asphalt modified by wastedrubber powder was studied through resultshows: if the asphalt is modified by wasted rubberpowder, its ration will appear to be declined , andits soft point will increase as much as more than 20℃,and its rotary viscosity will increase remarkably, and itsductility will be relatively small; With the increase of themixing amount of wasted rubber powder, the ration,the soft point, the ductility and the elastic recovery ofasphalt modified by wasted rubber powder are on therise, but if the mixing amount is relatively large, therising trend of the elastic recovery is not notable ; Withthe increase of the mesh number of asphalt modified bywasted rubber powder, the variation of the rationand the soft point of asphalt modified by wasted rubberpowder is disordered, and the ductil