中文摘要：

为了合理有效地选择橡胶沥青结合料制备过程中的胶粉掺量、外掺剂掺量及制备工艺参数，对其进行了多项性能的“4因素3水平”正交试验，分析了剪切时间、剪切温度、胶粉掺量及硫掺量对各项性能变化趋势及影响程度，并确定了各项制备工艺参数及外掺剂的优化组合方案。研究结果表明：胶粉掺量对橡胶沥青结合料各项性能均有显著影响，增加胶粉掺量能有效提高其高温性能，但同时降低其低温性能与弹性恢复能力，其最佳掺量应为20％～25％；剪切时间应在30min以上以保证胶粉充分溶胀，但剪切时间过长会导致橡胶沥青各项性能的显著降低，剪切时间应在30-60min之间；增大硫掺量能抑制橡胶沥青中的脱硫反应，在一定程度提高橡胶沥青高温性能，但过大的硫掺量会造成低温性能的显著下降，橡胶沥青中硫掺量宜小于胶粉掺量的0．69／6；橡胶沥青室内制备参数及外掺剂含量存在优化组合方案。

英文摘要：

In order to determine the rubber powder dosage, additive agent dosage and preparation parameters in the preparation of rubber asphalt, the influence of shear time, shear temperature, rubber powder dosage and sulfur dosage on various performance change trends and the influence degrees was analyzed by ＂four factors three levels＂ orthogonal experiment. The scheme of excel- lent combination with rubber powder dosage, additive agent dosage and preparation parameters was determined. The results show that the rubber powder dosage has a significant impact on the performance of rubber asphalt, and with the increase of the dosage of rubber powder dosage, the high temperature performance of rubber asphalt has been improved, but when the dosage is more than a certain dosage, the low temperature performance and elastic recovery performance will be significantly reduced. The best rubber powder dosage should be between 20%~25%. Shear time should be more than 30 min to ensure powder fully swelling, and long time shear can lead to the significantly reduced properties of rubber asphalt. The best shear time should be between 30 60 min. Increase of the dosage of sulfur can improve high temperature performance of rubber as-phalt, but when the dosage is more than a certain dosage, the low temperature performance will be significantly reduced, and the dosage of sulfur should be less than 6~. There is scheme of ex- cellent combination with various parameters. 9 tabs, 6 figs, 10 refs.