乳化沥青对沥青混凝土裂纹愈合性能的影响分析  

Effects of Emulsified Asphalt on Crack Healing Property of Asphalt Concrete

作　　者：Martin Riara 罗钦 杨钦麟 唐平[1] 磨炼同[1] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [2]广东省南粤交通投资建设有限公司,广州510101

出　　处：《武汉理工大学学报（交通科学与工程版）》2018年第1期112-115,120,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金青年基金项目资助(51408447)

摘　　要：采用半圆三点弯曲试验研究乳化沥青对沥青混凝土裂纹愈合性能的影响.试验结果表明,乳化沥青对沥青混凝土裂缝具有很好的修复效果,愈合指数达到30%~70%.延长养护时间有利于提高愈合指数.多次断裂-再愈合循环证实传统基质乳化沥青和SBR改性乳化沥青具备多次愈合能力.整体而言,普通乳化沥青愈合指数略高于SBR改性乳化沥青,其与乳液干燥速率和残留物粘度相关.The effects of emulsified asphalt on crack healing of asphalt concrete are investigated by using semi-circular bending test.Test results indicate that emulsified asphalt has good effect on crack healing with a heal index ranging from 30% to 70%.And it is helpful to improve the healing index by extending curing time.Fracture and re-healing tests confirm that both emulsified base asphalt emulsion and SBR modified asphalt emulsion have an ability of re-healing after repeated fractures.In general,common asphalt emulsion shows a higher healing index compared with SBR modified asphalt emulsion,which is related to the dry speed and the viscosity of the residue.

关 键 词：乳化沥青 沥青混凝土 裂纹 愈合性能 

分 类 号：U414[交通运输工程—道路与铁道工程]