胶粉粒径和用量对多孔沥青混合料路用性能的影响

研究了橡胶粉粒径和用量对多孔沥青混合料路用性能的影响。首先进行混合料设计确定最佳沥青用量,然后使用3个不同粒径大小（4~20目,20~200目和4~200目）的橡胶粉,胶粉用量为最佳沥青质量的10%,15%和20%进行干法改性。对试样进行渗透系数,飞散损失,间接拉伸强度和水稳定性试验。结果表明,使用10%的20~200目橡胶粉可提高多孔沥青混合料的路用性能。同时,增加胶粉粒径和用量降低了多孔沥青混合料的性能。

Crumb Rubber Size and Content on the Road Performance of Porous Asphalt Mixture

Studied the rubber powder particle size and content on the porous asphalt mixture per- formance. First performed to determine the optimum mix design asphalt content, and then use three differ- ent particle size （4 to 20 mesh,20 to 200 mesh and 4 to 200 mesh） rubber powder,powder dosage for the best quality of asphalt 10% ,15% and 20% for dry modified, on the specimen permeability coefficient, scattering losses, indirect tensile strength and water stability test. The results show that the use of 20 to 200 mesh particle size of the rubber powder mixture reduces the porosity and the permeability coefficient, increas;ng the scattering loss. At the same time,increasing the amount of powder particle size and reduces the performance of porous asphalt mixture.