Microwave Preparation of Expanded Vermiculite and Its Application in Building Energy Saving and Reducing CO<sub>2</sub> Emission

PENG Huiyun; CHEN Jiming; LUO Liming; LIU Haifeng; HUANG Yuehua; LI Xiangjin; XI Yongguang

doi:10.13779/j.cnki.issn1001-0076.2022.01.035

2022 Vol. 42, No. 4

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Article navigation > Conservation and Utilization of Mineral Resources > 2022 > 42(4): 30-37

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PENG Huiyun, CHEN Jiming, LUO Liming, LIU Haifeng, HUANG Yuehua, LI Xiangjin, XI Yongguang. Microwave Preparation of Expanded Vermiculite and Its Application in Building Energy Saving and Reducing CO2 Emission[J]. Conservation and Utilization of Mineral Resources, 2022, 42(4): 30-37. doi: 10.13779/j.cnki.issn1001-0076.2022.01.035

Citation:

PENG Huiyun, CHEN Jiming, LUO Liming, LIU Haifeng, HUANG Yuehua, LI Xiangjin, XI Yongguang. Microwave Preparation of Expanded Vermiculite and Its Application in Building Energy Saving and Reducing CO₂ Emission[J]. Conservation and Utilization of Mineral Resources, 2022, 42(4): 30-37. doi: 10.13779/j.cnki.issn1001-0076.2022.01.035

Microwave Preparation of Expanded Vermiculite and Its Application in Building Energy Saving and Reducing CO₂ Emission

1.
Southwest University of Science and Technology of Civil Engineering and Architecture, Mianyang 621010, Sichuan, China
2.
Institute of Mineral Materials and Applications, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
3.
Hainan Vocational University of Science and Technology, Haikou 571126, Hainan, China

More Information

Corresponding author: LUO Liming, luolimingdoc@163.com

Received Date: 20 June 2022

Publish Date: 25 August 2022

Abstract

Abstract

Based on the characteristics of rapid volume expansion caused by instantaneous vaporization of water molecules in vermiculite structural layer when exposed to heat, the industrial vermiculite was heated and expanded by microwave method and microwave chemical method to prepare expanded vermiculite with different particle sizes; The mechanical and thermal properties of expanded vermiculite/gypsum-based composite insulation board made by mold pressing and casting molding were studied; evaluate the energy-saving effect of expanded vermiculite thermal insulation material in building interior wall and thermal pipeline. The results show that The thermal insulation board made of expanded vermiculite prepared by microwave method as aggregate has lower density and thermal conductivity (0.082 W/(m·k)), and slightly higher moisture content; The density, thermal conductivity and compressive strength of expanded vermiculite/gypsum composite insulation board will decrease with the increase of expanded vermiculite sheet diameter; Under the condition that the average outdoor temperature in winter is 7℃, the energy-saving heat preservation template and pipeline heat-preservation template can save electricity by 20% stably, which have a broad application prospects in the field of building energy conservation.
- expanded vermiculite /
- composite insulation material /
- thermal conductivity /
- urban building energy conservation /
- saving energy and reducing CO₂ emission

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References

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