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Article type: Research Article
Authors: Zhang, Xingmeia; b; * | Yang, Datiana
Affiliations: [a] College of Civil Engineering, Chongqing Jiaotong University, Chongqing, China | [b] Chongqing Radio and TV University, Chongqing, China
Correspondence: [*] Corresponding author: Xingmei Zhang, College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China. E-mail: [email protected].
Abstract: In order to investigate the fatigue failure of compacted asphalt mixtures, the static creep mechanical behavior of aggregate-asphalt interfaces was conducted which especially constructed the creep equation between the deformation-time of aggregate-asphalt interfaces. The hard sandstone cylinder specimens of 38 mm and 21 mm in diameter were used to measure the static creep and strength of aggregate-asphalt, respectively. Through the gravity of asphalt itself, the excess asphalt flowed away from the end face of samples. A thin layer film was adhered to the end surface of hard sandstone cylinder samples. Shear strength and direct tensile strength between the aggregate-asphalt interfaces were measured with the electronic universal testing machine (EUTM) at the loading velocity of 50 mm/min and at 15∘C and 25∘C, respectively. The shear creep between the aggregate-asphalt interfaces was firstly done with EUTM successfully. The direct tensile creep was done with the universal testing machine (UTM). The shear creep deformation-time of the aggregate-asphalt interfaces was the power function relation. The direct tensile creep deformation-time of the aggregate-asphalt interfaces was also the power function relation. These power function relations of the aggregate-asphalt interfaces contribute to the following research about the fatigue failure of compacted asphalt mixtures.
Keywords: Aggregate-asphalt interface, shear strength, direct tensile strength, static creep, asphalt film
DOI: 10.3233/JCM-226392
Journal: Journal of Computational Methods in Sciences and Engineering, vol. 22, no. 5, pp. 1809-1818, 2022
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