沥青路面加热型密封胶的性能评价

Performance Evaluation of Asphalt Pavement Hot-applied Sealant

摘要:

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%。研究为交通行业标准的修订提供了技术依据。

Abstract:

Softening point and flow test results of twenty hot-applied sealants were analyzed. The results showed that softening point and flow value were 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 showed cement concrete specimens and asphalt concrete specimens didn’t have significant effect 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℃ and75%, -30℃ and 150%, respectively. The study provides a technical basis for the revision of the transportation industry specification for hot-applied sealant.