Use of epoxy asphalt as surfacing and tack coat material for roadway pavements

被引:59
|
作者
Apostolidis, Panos [1 ]
Liu, Xueyan [1 ]
Erkens, Sandra [1 ]
Scarpas, Athanasios [1 ,2 ]
机构
[1] Delft Univ Technol, Fac Civil Engn & Geosci, Sect Pavement Engn, Stevinweg 1, NL-2628 CN Delft, Netherlands
[2] Khalifa Univ Sci & Technol, Dept Civil Infrastruct & Environm Engn, Abu Dhabi, U Arab Emirates
关键词
Epoxy asphalt; Asphalt; Bitumen; Pavement; Structural performance; Interlayer characteristics; Tack coat;
D O I
10.1016/j.conbuildmat.2020.118936
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This work presents an experimental program developed to evaluate the effect of epoxy-asphalt binder, used as replacement of bitumen, on the durability and fatigue life of an asphalt concrete mix. The use of epoxy-type binder as tack coat has been explored as well and thus experiments have been conducted to quantify the effect of epoxy tack coat on the interface strength of two-layer asphalt samples. Results indicated that the epoxy asphalt mixes had higher tensile strength than control mixes, and the increase of strength was noticed with increasing proportionally the amount of epoxy in bitumen. Additionally, the four-point bending tests indicate that a high modulus material, as the epoxy modified asphalt, can effectively reduce deflections of specimen beams and improve the fatigue resistance of mixes designed for surfacing roadway applications. On the basis of interlayer tests, the use of epoxy asphalt binder as tack coat improved the bonding strength between the two layers offering monolithic performance characteristics on high modulus roadway pavements. Overall, the current study concludes that a two-layer monolithic pavement system with epoxy asphalt could mitigate bonding defects, such as debonding, slippage and fatigue cracking propagated from bottom to up, of a surfacing (top) pavement layer of enhanced strength, modulus and fatigue resistance. (C) 2020 The Author(s). Published by Elsevier Ltd.
引用
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页数:8
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