Elevated temperature properties of foam concrete: Experimental study, numerical simulation, and theoretical analysis

Zhou, Hongyuan; Zhao, Xinyu; Wang, Xiaojuan; Song, Tianyi; Liu, Hao; Zhang, Hong

doi:10.1016/j.conbuildmat.2023.134393

Cited by 7 publications

(2 citation statements)

References 64 publications

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“…With the rapid development of the economy and society, the issue of energy consumption is becoming increasingly severe. In 2021, the energy consumption of the construction and operation of buildings in China accounted for about 31% of the total energy consumption [1][2][3][4]. Currently, using insulation materials in buildings is a widely adopted solution [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, incombustible inorganic insulation materials exhibit commendable fire resistance and have broad application prospects in the field of thermal insulation. Among inorganic insulation materials, foam concrete is a thermal insulation material that contains a large number of honeycomb-like pores, formed by the mixing of pre-fabricated foam with cement slurry [4]. Due to its large number of closed honeycomb structures, foam concrete has low self-weight, excellent thermal insulation, and excellent fire resistance compared to traditional concrete, making it a promising insulation material [12,13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on the Coupled Heat Transfer of Conduction, Convection, and Radiation in Foam Concrete Based on a Microstructure Numerical Model

Huang,

Wang,

Feng

et al. 2024

Buildings

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Foam concrete is a typical cement-based porous material; its special microstructure endows it with excellent properties, such as light weight, energy efficiency, thermal insulation, and fire resistance. Therefore, it is widely used as a thermal insulation material for buildings. The heat transfer modes of foam concrete include conduction, convection, and radiation. However, previous studies considered conduction to be the dominant mode, often neglecting the effects of convection and radiation. In this study, a stochastic numerical model of the foam concrete microstructure is established based on the statistical parameters of the pore structure. With this model, the heat transfer mechanism of foam concrete is analyzed at the mesoscopic level, and the equivalent thermal conductivity is calculated. By comparing four different working conditions, the influence of conduction, convection, and radiation on the heat transfer of foam concrete is analyzed, and the specific contribution rates of conduction, convection, and radiation are calculated. The results show that the convection effect is weak due to the pore size being smaller than 1 ; so, the influence of convection can be neglected in the heat transfer analysis of foam concrete. The contribution of radiation increases with the decrease in foam concrete density and the increase in temperature difference. When the temperature difference is 40 and the density is 300 , the contribution of radiation exceeds 20. Therefore, for low-density and high-temperature difference situations, the influence of radiation cannot be ignored. The heat transfer in foam concrete is mainly through conduction, but with the decrease in density and the increase in temperature difference, the contribution of conduction shows a downward trend. Nevertheless, the contribution of conduction is still much larger than that of radiation and convection.

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