Materials Reports  2022, Vol. 36 Issue (Z1): 21090274-5 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Study on Technical Performance of Rice Husk Phosphate Building Gypsum Plastering Mortar |
| CHENG Junchen1, ZHAO Zhiman1,2, ZHANG Hui3, QUAN Sichen4, WU Lei1, LIAO Shixiong1
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1 Faculty of Civil Engineering and Architecture, Kunming University of Science and Technology, Kunming 650500, China
2 Yunnan Key Laboratory of Civil Engineering Disaster Prevention, Kunming University of Science and Technology, Kunming 650500, China
3 Yunnan Yuntianhua Environmental Protection Technology Co., Ltd., Anning 650300, Yunnan,China
4 Yunnan Cohesive Innovation Environmental Protection Technology Co., Ltd., Anning 650300, Yunnan,China |
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Abstract In this work, the technical properties of rice husk phosphorous building gypsum mortar made from rice husk before and after pretreatment were studied. The rice husk was soaked in clean water, saturated lime water and 2% NaOH solution to explore the apparent density, water absorption, stratification, water retention and cube compressive strength of rice husk phosphorus building gypsum mortar. The functional groups of rice husk and the performance of mortar interface transition zone were analyzed by infrared spectrum and scanning electron microscope. The results show that the mechanical strength of the rice husk phosphorous building gypsum mortar treated with clean water and saturated limestone water is significantly improved compared with the untreated mortar, while the mechanical strength of the mortar treated with 2% NaOH solution has no obvious change. Infrared spectrum analysis of rice husk showed that alkali treatment could effectively remove the wax layer, hemicellulose, lignin and SiO2 components of rice husk. In addition, the analysis of the interfacial transition zone shows that the surface roughness and microcracks affect the surface properties, which changes the surface force field, and then affects the surface structure and mechanical properties.
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Published: 05 June 2022
Online: 2022-06-08
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| Fund:National Natural Science Foundation of China(51662022),the Industrial High-tech Special Project of Science and Technology Department of Yunnan Province(202003AA080032)and the Analysis and Test Fund of Kunming University of Science and Technology(2020M20192210088) |
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