无核密度测试技术在SMA-10磨耗层碾压质量控制中的应用  

The Application of Nuclear-free Density Test Technology in the Rolling Quality of SMA-10 Wear Layer

作　　者：阳经培 杨理想 何仲强 YANG Jingpei;YANG Lixiang;HE Zhongqiang(Extension Project Management Office,Guangdong Maozhan Expressway Co.,Ltd.,Maoming 525022,Guangdong,China;China Railway 12 Bureau Group First Engineering Co.,Ltd.,Xi’an 710000,China;Guangzhou Xiaoning Road Engineering Technology Research Office Co.,Ltd.,Guangzhou 510641,China)

机构地区：[1]广东茂湛高速公路有限公司扩建工程管理处,广东茂名525022 [2]中铁十二局集团第一工程有限公司,西安710000 [3]广州肖宁道路工程技术研究事务所有限公司,广州510641

出　　处：《科技和产业》2024年第1期189-194,共6页Science Technology and Industry

摘　　要：SMA-10路面拥有良好的骨架嵌挤结构和足够的胶浆填充,具有优良的抗车辙、抗水损害、耐久性能,越来越多地应用于高速公路磨耗层和养护罩面层的铺筑。但在碾压环节容易出现过度碾压导致表面碎石被压碎,油膜脱落,不仅影响抗滑性能,甚至容易造成外界水分侵入导致路面水损害。为提高SMA-10沥青混合料的施工质量,以广东省粤西地区茂湛高速项目为依托,采用无核密度仪对碾压工艺开展试验研究。结果表明:影响SMA-10混合料压实度的主要因素包含压实组合、压实遍数和碾实温度,正常施工条件下碾压6遍(静压2.5遍+振动碾压3.5遍)即可达到规范要求的压实度,温度在下限状态下需适当增加振动碾压遍数;随着碾压遍数增加,压实度呈现先递增后平缓的规律,路表碎石棱角破损突出。建议对SMA-10路面施工,全面做好各阶段的温保措施,针对不同项目的SMA-10混合料的设计情况,采用无核密度仪获得压实曲线,作为SMA-10混合料精准碾压的控制手段。SMA-10 pavement has a good skeleton embedded structure and sufficient mortar filling.It has excellent anti-rutting,anti-water damage and anti-sliding durability.It is increasingly used as the paving of highway wear layer and maintenance cover layer.However,in the rolling process,excessive rolling is prone to cause surface gravel to be crushed and the oil film to fall off,which not only affects the anti-skid performance,but also easily causes external water intrusion to cause surface water damage.In order to improve the construction quality of SMA-10 asphalt mixture,based on the Maozhan high-speed project in the western Guangdong area of Guangdong Province,the non-nuclear densitometer was used to carry out experimental research on the rolling process.The results show that the main factors affecting the peak compaction degree of SMA-10 mixture are the number of rolling passes and the temperature of the mixture.The design compaction degree can be reached by rolling 6 times(static pressure 2.5 times+vibration rolling 3.5 times)at normal temperature,and the number of vibration rolling times needs to be increased at low temperature.As the number of rolling passes increases,the degree of compaction increases first and then flattens out,and the subsequent angular damage is obvious;it is suggested that the insulation measures of each link should be strictly done for SMA-10 mixture.According to the design of SMA-10 mixture in different projects,the compaction curve is obtained by using the non-nuclear density meter,which is used as the control method of SMA-10 mixture precision rolling.

关 键 词：SMA-10 沥青混合料 上面层 压实曲线 无核密度仪 

分 类 号：U416.221[交通运输工程—道路与铁道工程]