胶粉掺量对沥青混合料高温抗变形性能的影响

将废旧橡胶轮胎制备成橡胶粉作为沥青改性剂使用,是目前非常热门的研究方向.该研究探讨了不同掺量的再生胶粉对沥青混合料高温抗变形性能的影响.首先在实验室内通过手工研磨将废旧轮胎加工为大小约为60目的胶粉颗粒;然后将胶粉与基质沥青混合,预先制备成胶粉体积掺量分别为10％、20％、30％和40％的四种胶粉改性沥青;设计沥青混合...

Effect of Dosage of Rubber Powder on High-temperature Deformation Resistance of Asphalt Mixture

Reproducing waste tires into powder and using rubber powder as asphalt modifier is a very hot topic.The effect of the dosage of rubber powder on the high-temperature deformation resistance of asphalt mixture was investigated in this research.Rubber powder with size of about 60 mesh was firstly prepared by grinding waste tires in the laboratory.Then rubber powder was mixed with asphalt binder to prepare modified asphalt,and four kinds of modified asphalt with the dosage of rubber powder of 10%,20%,30%and 40%,respectively,were prepared.Finally,asphalt mixtures with rubber modified asphalt were designed and the high-temperature deformation resistance of asphalt mixtures was evaluated by rutting test.Results showed that too small or too high dosage of rubber powder in asphalt binder were both not beneficial for improving the high-temperature stability of asphalt mixtures.The suitable dosage of rubber powder in modified asphalt binder was 20%~30%.