Performance Evaluation of Asphalt Pavement Hot-applied Sealant

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.

Key words:road engineering; crack; hot-applied sealant; performance evaluation; technical requirement; analysis of variance