胶粉改性沥青的老化及再生

Aging and regeneration of crumb rubber modified asphalt

制备了胶粉改性沥青(CRMA)并在实验室中进行老化,并在老化后的CRMA中添加苯乙烯—丁二烯—苯乙烯三嵌段共聚物(SBS)、橡胶油、胶粉进行再生。以SBS质量分数、橡胶油质量分数、胶粉质量分数以及再生温度作为四因素进行正交实验,并对结果进行极差和方差分析,探究各因素对再生CRMA性质的影响,并对其进行了优化。实验结果表明,各因素对再生CRMA性质影响程度大小依次为:温度、SBS质量分数、橡胶油质量分数、胶粉质量分数;优化结果为:SBS的质量分数为1%,橡胶油的质量分数为6%,胶粉的质量分数为7%,再生温度为200℃,在此方案下制备的再生CRMA各项性质符合中石化CRMA-Ⅲ类标准。

The crumb rubber modifiedasphalt（ CRMA） is prepared and aged in laboratory. The regeneration of aged CRMA is carried out by adding styrene-butadiene-styrene triblock copolymer（ SBS）,rubber oil andcrumb rubber. The effects of SBS,rubber oil,crumb rubber and regenerated temperature on the properties of regenerated CRMA are studied by orthogonal test. The results are analyzed by means of variance and variance analysis. The effects of various factors on the properties of regenerated CRMA are as follows： temperature mass fraction of SBS mass fraction of rubber oil mass fraction ofcrumb rubber. The properties of regenerated CRMA can meet the standard of CRMA-Ⅲ under the optimal preparation conditions： 1% mass fraction of SBS,6% mass fraction of rubber oil,7% mass fraction of crumb rubber and200℃ of the regeneration temperature.