RAP精细化油石分离及存储条件研究  

Study on Refined Asphalt-aggregate Separation and Storage Conditions of RAP

作　　者：王红祥[1] 晏应 李宁 王德玉 唐伟 WANG Hongxiang;YAN Ying;LI Ning;WANG Deyu;TANG Wei

机构地区：[1]江苏现代路桥有限责任公司,江苏南京210049 [2]河海大学土木与交通学院,江苏南京210098

出　　处：《城市道桥与防洪》2023年第10期209-214,M0019,共7页Urban Roads Bridges & Flood Control

基　　金：江苏现代路桥有限公司科技项目(2021JKY18)。

摘　　要：介绍了一种废旧沥青路面材料(RAP)精细化油石分离技术,并通过抽提和筛分试验,评价了该技术的分离效果和结团组成,同时对比了不同堆放条件下的RAP复结团现象。结果表明,经过精细化油石分离处理后的RAP材料,3 mm以上粗RAP料的油石比降低1.23%-2.40%,其分离后的结团程度随粒径增加而增加;某档粒径的旧料颗粒主要由2.36 mm以上的集料和0.15 mm以下的粉料结团而成;分离后的RAP存储建议采用室内封闭存储,0-3 mm档RAP堆放高度小于5 m,0-3 mm、3-5 mm档RAP堆放时间不超过7 d;分离前RAP含水率应控制在1.5%以内。A refined asphalt-aggregate separation technology of reused asphalt pavement(RAP)material is introduced.The separation effect and caking composition of this technology are evaluated through the extracting and screening tests.And at the same time,the repeated caking phenomenon of RAP is compared under the different stacking conditions.The results show that the asphalt-aggregate ratio of more than 3 mm coarse RAP material can be reduced by 1.23%-2.4%after the refined asphalt-aggregate separation.The caking level after its separation will increase with the increase of grain size.The used material particles of a certain size are mainly composed of aggregates above 2.36 mm and powders below O.15 mm.It is recommended that the indoor closed storage is used for the separated RAP,the stocking height of 0-3 mm RAP is less than 5 m,the stocking time of 0-3 mm and 3-5 mm RAP should not exceed 7 days,and the moisture content of RAP should be controlled within 1.5%.

关 键 词：废旧沥青路面材料(RAP) 精细化油石分离 结团率 存储管理 

分 类 号：U418[交通运输工程—道路与铁道工程]