RAP级配特征及对冷再生沥青混合料的影响  

RAP GRADATION CHARACTERISTICS AND ITS IMPACT ON COLD RECYCLED MIXTURE

作　　者：杨松翰 李响 张崇康 YANG Songhan;LI Xiang;ZHANG Chongkang(School of Civil Engineering,Northeast Forestry University,Harbin 150006,China;Jinpu Branch of Liaoning Expressway Operation Management Co.,Ltd.,Liaoning Dalian 116000,China)

机构地区：[1]东北林业大学土木工程学院,哈尔滨150006 [2]辽宁省高速公路运营管理有限公司金普分公司,辽宁大连116000

出　　处：《低温建筑技术》2022年第4期30-33,共4页Low Temperature Architecture Technology

摘　　要：为探究RAP级配特征,剖析其对冷再生混合料性能的影响,基于抽提、击实和马歇尔试验对粗、细两档RAP展开研究。结果表明粗RAP中的中大块料多数由细料结团而成,性能受旧沥青影响;对于冷再生混合料,RAP掺量宜控制在40%~60%,粗、细比例得当时会轻微提升马歇尔稳定度。To investigate the gradation characteristics of RAP and analyze its influence on the properties of cold recycled mixtures,two grades of RAP,coarse and fine,were studied based on the extraction,the compaction,and Marshall tests.The results show that most of the medium and large blocks in the coarse RAP are agglomerated by the fine materials,and the performance is affected by the old asphalt.For the cold recycled mixture,the RAP content should be controlled at 40%~60%,and the appropriate ratio of the coarse to the fine can increase Marshall stability.

关 键 词：RAP 结团料 击实 级配变化 乳化沥青冷再生 

分 类 号：TU502[建筑科学—建筑技术科学]