基于STC-SMA层间性能的沥青混合料设计与评估

doi:10.11896/cldb.21080246

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Abstract In order to study the influence of asphalt surface layer on the interlayer bonding performances of super toughness concrete composite bridge deck, the oblique shear and tensile test of super toughness concrete (STC) -stone matrix asphalt (SMA) composite specimens were carried out. The influences of mineral aggregate gradation, binder type and ambient temperature on the mechanical properties of the interlayer were explored. After several freeze-thaw cycles, the deterioration effect of water damage on interlayer bonding performance was evaluated. The results show that reasonable mixture gradation can improve the bonding performances of STC-SMA, and SMA-13A is of the best performances. High elastic-high viscosity asphalt binder is conducive to enhancing the bonding performance of STC-SMA. Under 25 ℃ and 60 ℃, the interlaminar shear strength of PG100-SMA-13A was 33.7% and 55.9% higher, and the shear fracture energy was 41.2% and 27.4% higher than that of SBS-SMA-13A, respectively. The interlaminar tensile strength increased by 15.5% and 23.1%, and the tensile fracture energy increased by 27.0% and 17.0%, respectively. The ambient temperature had a significant influence on the interlayer performances. Contrasting with room temperature, the interlaminar shear strength and tensile strength of STC-PG100-SMA-13A decreased by 64.2% and 77.5% at high temperature, respectively. After 12 freeze-thaw cycles, the shear strength and tensile strength of PG100-SMA-13A composite specimens were 1.75 MPa and 1.00 MPa, respectively. PG100-SMA-13A is of good interlaminar performances and water stability. Therefore, PG100-SMA-13A is recommended as the wearing layer of STC, and the high temperature stability is suggested to be included in the design control index.

Key words： super toughness concrete composite deck interlaminar performance shear test tensile test

Published: 10 March 2023 Online: 2023-03-14

CLC number:

U443.33

Fund:National Natural Science Foundation of China (52038003).

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	LI Jia
	QIN Shimao
	ZHANG Henglong

Cite this article:

LI Jia,QIN Shimao,ZHANG Henglong. Design and Evaluation of Asphalt Mixture Based on STC-SMA Interlayer Performances[J]. Materials Reports, 2023, 37(5): 21080246-8.

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http://www.mater-rep.com/EN/10.11896/cldb.21080246 OR http://www.mater-rep.com/EN/Y2023/V37/I5/21080246

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