固废粗集料平均弹性模量与混凝土弹性模量的相关性

doi:10.11896/cldb.22050271

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Abstract The correlation between the σ-ε curve characteristics of twelve solid waste coarse aggregate in the crushing value test and the static elastic modulus of concrete was studied experimentally, and the deformation of coarse aggregate in crushing value test was simulated by discrete element method, as well as the reason of big error in calculating elastic modulus of solid waste coarse aggregate concrete by expressions in main codes at home and abroad was analyzed. The results showed that the calculated values of elastic modulus of ordinary density solid waste coarse aggregate concrete by the codes from Chinese, American and European are 45.5%, 15.8% and 52.5% higher than the measured values, respectively;the solid waste coarse aggregate maintains almost elastic state within the linear region of σ-ε curve;the established solid waste coarse aggregate σ-ε curve exponential model has a high degree of fit, R²＞0.99;by introducing the parameters such as average elastic modulus and water content coefficient of coarse aggregate based on the traditional crushing value test, the semi-empirical expression of elastic modulus of solid waste coarse aggregate concrete was established by regression, and R² is 0.867. Finally, the general applicability of the semi-empirical expression was tested by the measured values from literature, and the high judgment coefficient (R²=0.895) shows the effectiveness of the expression, which provides a basis for fast and reliable prediction of elastic modulus of solid waste coarse aggregate concrete.

Key words： solid waste coarse aggregate crushing value average elastic modulus of aggregate elastic modulus of concrete discrete element method

Published: 25 February 2024 Online: 2024-03-01

CLC number:

TU528

Fund:National Natural Science Foundation of China (U1261122).

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	LI Chao
	ZHOU Mei
	LI Yang
	ZHANG Kai
	GUO Lingzhi

Cite this article:

LI Chao,ZHOU Mei,LI Yang, et al. Correlation Between Average Elastic Modulus of Solid Waste Coarse Aggregate and Elastic Modulus of Concrete[J]. Materials Reports, 2024, 38(4): 22050271-8.

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http://www.mater-rep.com/EN/10.11896/cldb.22050271 OR http://www.mater-rep.com/EN/Y2024/V38/I4/22050271

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