用于泡沫混凝土制备的静态混合器模拟研究

doi:10.11896/cldb.23010061

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Abstract As an emerging lightweight green building material, foamed concrete has developed rapidly in the past ten years, and has a relatively wide application prospect. In the preparation process of foamed concrete, the mixing of slurry and foam is the key to determine the product performance. However, there are too much attention paid to the foaming process, but not to the mixing process, thus the theoretical research and equipment development of the mixing process are lacking. Therefore, it is necessary to create a special mixer that meets the performance of foamed concrete materials and realizes continuous and efficient production. Considering the characteristics of mixers comprehensively, static mixer has been researched in this work. The numerical simulation was carried out for the mixing process of foam slurry, and a three-dimensional model was established. By simulating the mixing of cement slurry and foam with different parameters, the number of components, the inner diameter of the pipe, the angle of the components and the position of the feeding port were studied respectively. The results showed that when the cutting action of the components is perpendicular to the fluid distribution, the more conducive to mixing; the smaller the inner diameter of the mixer tube, the faster the mixing speed, the more uniform of the density distribution, but simultaneously, the energy consumption of the equipment is higher. The number of components is positively related to the mixing effect of the final product. The smaller the distance between the feeding port and the mixing element, the better for uniform mixing. To sum up, under the optimal conditions of θ=90°, D=60 mm, n=10, L=20 mm, foamed concrete with uniform mixing and density of 1 400 kg/m³ can be finally prepared. This research provides the theoretical support for the research and development of a new type mixing device for foamed concrete.

Key words： static mixer foamed concrete numerical simulation multiphase flow

Published: 10 August 2024 Online: 2024-08-29

CLC number:

TU5

Fund:National Key Research and Development Program of China (2021YFB3802000, 2021YFB3802002).

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	Articles by authors
	ZHENG Wukui
	ZHAO Yueyao
	WANG Yachen
	LI Hui

Cite this article:

ZHENG Wukui,ZHAO Yueyao,WANG Yachen, et al. Simulation Study on Static Mixer for Foamed Concrete Preparation[J]. Materials Reports, 2024, 38(15): 23010061-8.

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http://www.mater-rep.com/EN/10.11896/cldb.23010061 OR http://www.mater-rep.com/EN/Y2024/V38/I15/23010061

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