等钒铁渣复合物改性硅藻土制备高强耐水调湿材料

doi:10.11896/j.issn.1005-023X.2018.08.005

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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.

Key words： diatomite humidity-controlling materials compressive strength softening coefficient equilibrium moisture content absorption and desorption rate

Published: 25 April 2018 Online: 2018-05-11

CLC number:

TB34

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	Articles by authors
	HU Mingyu
	FU Chao
	WEI Lili
	LIU Zhangjun

Cite this article:

HU Mingyu,FU Chao,WEI Lili, et al. A High-strength and Water-resistant Humidity-controlling Material Prepared by Modifying Diatomite with Vanadium- and Iron-containing Compound Slag[J]. Materials Reports, 2018, 32(8): 1230-1235.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.08.005 OR https://www.mater-rep.com/EN/Y2018/V32/I8/1230

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