Bulletin of the Chinese Ceramic Society, Volume. 42, Issue 3, 939(2023)
Preparation of Foamed Ceramics from Granite Scrap and Marble Scrap
To achieve the goal of “double carbon”and promote the resource utilization of bulk solid waste, the method and theory of coordinated preparation of foamed ceramics materials by various solid wastes were developed and explored. Foamed ceramics with high closed porosity were prepared by sintering at high temperature with granite scrap and marble scrap as main raw materials and SiC as foaming agent. The effects of raw material ratio, sintering temperature and foaming agent content on the pore structure and properties of foamed ceramics were investigated. The results show that at high temperature, CaO decomposed from the CaCO3 component in marble scrap is an effective flux that destroys the Si—O bond, reduces viscosity of liquid phase and promotes smooth foaming. Meanwhile, CaO can react with SiO2 to form wollastonite, which improves compressive strength of material. The foamed ceramics have the most favorable uniform pore structure and overall performance when the sintering temperature is 1 130 ℃, the marble scrap mass content is 10% and the SiC mass content is 1.0%, with the closed porosity of 79.16%, the bulk density of 583.42 kg/m3, the compressive strength of 3.86 MPa and the water absorption rate of 0.40%. This study provides a theoretical foundation for the preparation of foamed ceramics by recycling granite scrap and marble scrap.
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DONG Yiran, ZHAO Chenglin, GUO Wei, JIANG Congcong, HUANG Shifeng, CHENG Xin. Preparation of Foamed Ceramics from Granite Scrap and Marble Scrap[J]. Bulletin of the Chinese Ceramic Society, 2023, 42(3): 939
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Received: Oct. 17, 2022
Accepted: --
Published Online: Apr. 14, 2023
The Author Email: Congcong JIANG (mse_jiangcc@163.com)
CSTR:32186.14.