摘要
为探究化学组成对集料抗滑性能的相关性,采用SEM、XRD分析了玄武岩、花岗岩和88#煅烧铝矾土集料的微观形貌和化学组成;通过PSV试验、压碎值、洛杉矶磨耗试验、黏附性试验对比评价了3种集料的技术性能,并运用SPSS软件分析了SiO_(2)、Al_(2)O_(3)和CaO对不同集料性能的影响;获取磨光16000次后集料的PSV、轴向系数与均方根高度(Rq),并与Al_(2)O_(3)/SiO_(2)进行相关性分析。结果表明:SiO_(2)与Al_(2)O_(3)含量对集料抗滑性能和黏附性能有重要影响;高Al_(2)O_(3)含量有助于提高集料与沥青间的黏附性;Al_(2)O_(3)/SiO_(2)与轴向系数和Rq均有较好相关性;Al_(2)O_(3)/SiO_(2)值越大,集料抗滑性能越佳,为快速遴选沥青路面表层用抗滑耐磨集料提供了另一种思路。
In order to explore the correlation between the chemical composition and the skid resistance of aggregates,the micro morphology and chemical composition of basalt,granite and 88#calcined bauxite aggregates were analyzed by SEM and XRD.The technical properties of three aggregates were evaluated by PSV test,crushing value,los angeles abrasion testand adhesion properties test.Meanwhile,the effects of SiO_(2),Al_(2)O_(3) and CaO on the performance of different aggregates were analyzed by SPSS software.After 16000 times of polishing,the PSV,axial coefficient and root mean square height(Rq)of aggregates were obtained,and the correlation between them and Al_(2)O_(3)/SiO_(2) was analyzed.The results show that the content of SiO_(2) and Al_(2)O_(3) has an important influence on the adhesion properties andanti-skid performance of aggregate.High Al_(2)O_(3) content helps to improve the adhesion between the aggregate and asphalt.Al_(2)O_(3)/SiO_(2) has a good correlation with the axial coefficient and Rq.The larger Al_(2)O_(3)/SiO_(2) value is,the better the anti-skid performance of aggregate is,which provides a way for rapid selection of anti-skid and wear-resistant aggregate for asphalt pavement surface course.
作者
赵华
李松
熊锐
关博文
ZHAO Hua;LI Song;XIONG Rui;GUAN Bowen(School of Civil Engineering and Architecture,Nanchang University, Nanchang,Jinagxi 330031, China;School of Transportation, Wuhan University of Technology, Wuhan,Hubei 430063, China;College of Materials Science and Engineering, Chang'an University, Xi'an,Shaanxi 710061, China)
出处
《公路工程》
2022年第3期104-111,共8页
Highway Engineering
基金
江西省重点研发计划项目(20192BBG70064)。
关键词
道路工程
集料
煅烧铝矾土
抗滑性能
化学组成
SPSS
road engineering
aggregate
calcined bauxite
skid resistance
chemical composition
SPSS
