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- W42400570 abstract "Crack sealing is one of the most common pavement preventive maintenance treatments in China and other countries. It can prevent the water into pavement structure, hence extend pavement service life. However, crack sealant often fails prematurely due to the bad adhesion. There are many factors influencing the adhesion of crack sealant to crack walls. But the adhesion failure mechanisms are still not clear now. Hence, this study analyzes the adhesion failure mechanisms of crack sealant to crack walls based on the new developed low temperature performance tester of asphalt pavement crack sealant. First, this study designs a new test fixture and corresponding test method to measure adhesion failure stress/strain at different conditions. Second, this paper uses AC-13 asphalt concrete with virgin asphalt, AC-13 asphalt concrete with rubber asphalt, SMA-16 asphalt concrete and aluminum as substrates to imitate crack walls. The bonding surface properties was analyzed using IPP (Image-Pro Plus) software. The void area percentage, asphalt mastic area percentage and aggregate area percentage were calculated for each debonding surface. Then this study built the relationship between the bonding surface properties and failure stress/strain. The effect of bonding surface type on the adhesion was investigated also. Finally this paper explains adhesion failure mechanism of crack sealant to crack walls based on weak boundary theory. Four typical failure modes were summarized according to test results." @default.
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- W42400570 date "2015-01-01" @default.
- W42400570 modified "2023-09-26" @default.
- W42400570 title "Preliminary Investigation of Adhesion Failure Mechanisms of Crack Sealant to Pavement Crack Walls" @default.
- W42400570 hasPublicationYear "2015" @default.
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