多孔玄武岩细集料含水状态对沥青混合料水稳定性能影响研究  

Effect of Water Content State of Porous Basalt Fine Aggregate on Water Stability of Asphalt Mixture

作　　者：张立兵[1] 朱月雷 琚琳 王艳艳[4] 丁益 ZHANG Libing;ZHU Yuelei;JU Lin;WANG Yanyan;DING Yi(Anhui Road and Bridge Engineering Group Co.,Ltd.,Hefei 230088,China;School of Materials and Chemical Engineering,Anhui Jianzhu University,Hefei 230601,China;Anhui Province Engineering Laboratory of Advanced Building Materials,Hefei 230601,China;Anhui Institute of Building Research and Design,Hefei 230031,China)

机构地区：[1]安徽省路桥工程集团有限责任公司,安徽合肥230088 [2]安徽建筑大学材料与化学工程学院,安徽合肥230601 [3]安徽省先进建筑材料工程实验室,安徽合肥230601 [4]安徽省建筑科学研究设计院,安徽合肥230031

出　　处：《安徽建筑大学学报》2023年第4期77-82,共6页Journal of Anhui Jianzhu University

基　　金：安徽省住房城乡建设科学技术计划项目(2021-YF28);安徽建工集团科研项目(2021-20JF)。

摘　　要：多孔玄武岩可以替代优质天然集料作为石材,在确保路面性能的基础上,实现节约资源的目的。但由于其表面的多孔特性,在用于路面时,需重视其水稳定性能。本文设计了AC-20沥青混合料,通过马歇尔试验得到混合料的最佳沥青含量,并制备出对应级配的沥青混合料,以浸水马歇尔试验得出的残留稳定度和冻融劈裂试验得出的冻融劈裂试验强度比评定沥青混合料的水稳定性能研究。研究发现,集料粒径越小,对水的敏感程度越高,越容易吸水;水分会影响沥青与集料之间的黏附情况,从而对混合料的稳定性产生不利影响。SBS改性沥青混合料水稳定性能优于70号石油沥青混合料。Porous basalt can replace other high-quality natural aggregate as stone,saving resources while ensuring the pavement performance.However,due to its porous surface,attention should be paid to its water stability performance when it is applied to pavement.In this paper,an AC-20 asphalt mixture was designed.The optimal asphalt content of the mixture was obtained by Marshall test,and the corresponding graded asphalt mixture was prepared.The water stability performance of the mixture was evaluated based on the residual stability obtained by the immersion Marshall test and the splitting strength ratio by the freeze-thaw splitting experiment.It was found that the smaller the aggregate particle size,the more sensitive it is to water,and the more likely it is to absorb water.Besides,the moisture affects the adhesion of asphalt to the aggregate,and adversely affects the stability of the mixture.The water stability of SBS modified asphalt mixture is better than that of No.70 petroleum asphalt mixture.

关 键 词：多孔玄武岩 沥青混合料 水稳定性能 道路工程 

分 类 号：TU528.42[建筑科学—建筑技术科学]