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Investigation of the Behavior of Asphalt Tack Interface Layer. Final rept.
| 题名： | Investigation of the Behavior of Asphalt Tack Interface Layer. Final rept. |
| 作者： | MOHAMMAD, L. N.; RAQIB, A.; WU, Z. |
| 关键词： | *Asphalt-pavements; *Coatings-.;Preparation-; Properties-; Rheometer-tests; Viscometer-tests; Materials-; Mixtures-; Shear-strength; Asphalt-cement; Emulsion-. |
| 摘要： | Asphalt tack coat is a light application of asphalt, usually asphalt diluted with water. It ensures a bond between the surface being paved and the overlying course by providing increased shear strength between two interfaces. Normally hot asphalt cements, emulsified asphalts or cutback asphalts are used as tack coat. The objective of this study was to evaluate the practice of using tack coats through controlled laboratory simple shear tests and determine the optimum application rate. The influence of tack coat types, application rates, and test temperatures on the interface shear strength was examined. Six emulsions (CRS-2P, CRS-2L, SS-1, CSS-1, SS-1h and SS-1L) and two asphalt binders (PG 64-22 and PG 76-22M) were selected as tack coat materials. The influence of vertical load levels on interface bonding strength was evaluated using the optimum tack coat material and application rate. Based on the statistical analysis of the interface bond strengths provided by various tack coat types at different application rates, both CRS-2P and CRS-2L were identified as the optimum tack coat types among the eight tack coats considered in this study. |
| 报告类型： | 科技报告 |
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