三维细观早龄期混凝土导热性能数值模拟

doi:10.11896/cldb.24040083

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Abstract In order to study the thermal conductivity of early-age concrete, 3D mesoscopic concrete models were established to simulate the thermal conductivity of concrete cylinder model at different ages. The concrete model included four kinds of rock aggregates such as limestone, siltstone, basalt and quartzite, and especially to the basalt concrete, the influences of three kinds of volume proportions and size gradations on the thermal conductivity of early-age were analyzed. The results show that the 3D mesoscopic concrete model is suitable for numerical simulation of thermal conductivity of early-age concrete, which can clearly describe the geometric shape and spatial distribution of aggregate model, show the internal temperature fields, isotherms and heat flow fields of early-age concrete, and accurately predict the thermal conductivity of concrete. The thermal conductivity of concrete decreases with the extension of curing age, and its reduction range becomes smaller and tends to be stable. The thermal conductivity of concrete is positively correlated with the thermal conductivity of rock. The greater the thermal conductivity of rock aggregate is, the greater the thermal conductivity of concrete is. The volume proportion of aggregate has a significant effect on the thermal conductivity of concrete. The smaller the volume proportion of aggregate, the smaller the thermal conductivity of concrete. The effect of aggregate particle size grade on the thermal conductivity of concrete is not significant. The values from finite element simulation have a high accuracy calculated with an error of less than 2.5% to the theoretical values from H-C model.

Key words： early-age concrete parametric modeling thermal conductivity meso-concrete numerical simulation

Published: 25 May 2025 Online: 2025-05-13

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TU528

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	Articles by authors
	ZHAO Weiping
	LIU Yingjian
	SHENG Zhaochuan
	CHENG Sai
	XU Yang

Cite this article:

ZHAO Weiping,LIU Yingjian,SHENG Zhaochuan, et al. 3D Mesoscopic Numerical Simulation on Thermal Conductivity of Early-age Concrete[J]. Materials Reports, 2025, 39(10): 24040083-10.

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https://www.mater-rep.com/EN/10.11896/cldb.24040083 OR https://www.mater-rep.com/EN/Y2025/V39/I10/24040083

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