A High-strength and Water-resistant Humidity-controlling Material Prepared by Modifying Diatomite with Vanadium- and Iron-containing Compound Slag
HU Mingyu1, FU Chao1, WEI Lili1,2, LIU Zhangjun1
1 Key Laboratory for Ultra-low Energy Building of Jiangxi Province, School of Civil Engineering and Architecture, NanchangUniversity, Nanchang 330031; 2 School of Architectural and Mechanical Engineering, Chifeng University, Chifeng 024000
Abstract: The new diatomite humidity-controlling material was prepared by using natural diatomite as raw materials, vana-dium- and iron-containing compound slag as inorganic modified admixture. It was cured in room temperature after simple compaction molding. The effect of the inorganic modified admixture content on strength, water resistance, and humidity-controlling performance of the diatomite humidity-controlling material were tested. Based on the micro-analysis of the scanning electron microscope and the absorption/desorption theory of materials, the modified mechanism and the humidity-controlling mechanism of the diatomite humidity-controlling material were investigated. The results showed that when the content of inorganic modified admixture was 15%—20%, the compressive strength, softening coefficient, the maximum equilibrium moisture content, and the maximum absorption and desorption rate of the diatomite humidity-controlling material at 60 d were 5.5—6.10 MPa, 0.62—0.74, 19.9%—20.8%, 0.069—0.073 kg/(kg·d) and 0.042—0.045 kg/(kg·d), respectively, which indicated that the material had an excellent performance. The hardening mechanism of the diatomite humidity-controlling material were ion exchange reaction, aggregate effect and hard coagulation reaction. The cellular microstructure of diatomite humidity-controlling material have the effects of capillary channel, chemical adsorption and surface physical adsorption on water vapor, which enable its excellent strength, water resistance and humidity-controlling performance.
胡明玉, 付超, 魏丽丽, 刘章君. 等钒铁渣复合物改性硅藻土制备高强耐水调湿材料[J]. 《材料导报》期刊社, 2018, 32(8): 1230-1235.
HU Mingyu, FU Chao, WEI Lili, LIU Zhangjun. A High-strength and Water-resistant Humidity-controlling Material Prepared by Modifying Diatomite with Vanadium- and Iron-containing Compound Slag. Materials Reports, 2018, 32(8): 1230-1235.
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2018, Vol. 32 
