Investigation of adhesion and interface bond strength for pavements underlying chip-seal: Effect of asphalt-aggregate combinations and freeze-thaw cycles on chip-seal. (10th April 2019)

• Record Type: Journal Article
• Authors: You, Lingyun; You, Zhanping; Dai, Qingli; Xie, Xinfeng; Washko, Sarah; Gao, Junfeng
• Is Part Of: Construction & building materials. Volume 203(2019)
• Page Start: 322
• Page End: 330
• Publication Date: 2019-04-10
• Subjects: Asphalt pavement -- Chip-seal -- Asphalt-emulsion -- Adhesion -- Interface bond strength -- Vialit test -- Interface bond test (IBT) -- Freeze-thaw cycle; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2019.01.058
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Interface bond test (IBT) was developed to directly evaluate bond performance of chip-seal with pavement. Vialit test and IBT test were applied together to investigate the durability of chip-seal. The multiple freeze-thaw cycle has significantly impact on the durability of chip-seal. The combination of asphalt-aggregate cannot be ignored in chip-seal application. Abstract: The objective of this study is to investigate the effect of the asphalt-aggregate combination and freeze-thaw cycle on the durability of chip-seal. The Vialit test was applied to investigate the adhesion of asphalt-emulsion and aggregate at low-temperatures. Tests were performed at −10, −22, and −26 °C for asphalt-emulsion based chip-seal. In addition, the Michigan Tech's Interface Bond Test (IBT) was also employed to assess the interface bond strength between the chip-seal layer and asphalt pavement under varying temperatures and under a number of freeze-thaw cycles. Both tests indicated that the asphalt-aggregate combinations and freeze-thaw cycle had significant impact on the durability of chip-seal. The combination between asphalt-emulsion and aggregate cannot be ignored in chip-seal application. Such results suggest that the premature failure of the chip-seal is in part due to the raw materials used and the multiple freeze-thaw cycles suffered. Therefore, it is essential to select the appropriate combination of aggregate and asphalt-emulsion when considering the use of chip-seal, especially in cold weather areas.