沥青路面加热型密封胶的性能评价

Performance Evaluation of Asphalt Pavement Hot-applied Sealant

分析了20种加热型密封胶的软化点和流动试验结果,结果表明软化点和流动值具有相关性(显著性水平p<0.01),建议弃用流动试验.分别采用水泥混凝土模块和沥青混凝土模块制作拉伸试件,进行低温拉伸试验.对试验结果进行双因素方差分析,结果显示不同模块对低温拉伸试验的影响不显著(显著性水平p>0.05),建议采用沥青混凝土模块.进行了沥青路面裂缝运动观测,根据观测结果,提出4种类型密封胶低温拉伸试验的试验温度和拉伸量要求分别为:0℃和25%、-10℃和50%、-20℃和75%、-30℃和150%.该研究为交通行业标准的修订提供了技术依据.

Softening point and flow test results of twenty hot-applied sealants were analyzed.The results show that the softening point and flow value are related(significance level p<0.01),thus flow test can be abandoned.Cement concrete specimens and asphalt concrete specimens were conducted by bond test,respectively.Two-factor analysis of variance show cement concrete specimens and asphalt concrete specimens do not have significant effects on bond test(significance level p>0.05).Asphalt concrete specimens were recommended to use in bond test.Asphalt pavement crack movements were observed,according to the observations,test temperature and extension requirements of bond test for four types sealants were: 0 ℃ and 25%,-10 ℃ and 50%,-20 ℃ and 75%,-30 ℃ and 150%,respectively.The study provides a technical basis for the revision of the transportation industry specification for hot-applied sealant.