Preparation of specific gypsum with advanced hardness and bending strength by a novel In-situ Loading-Hydration Process

被引：14

作者：

Zhou, Jun ^{[1
]}

Liu, Chao ^{[1
]}

Shu, Zhu ^{[1
]}

Yu, Dongxue ^{[1
]}

Zhang, Qiuyu ^{[1
]}

Li, Tiantian ^{[1
]}

Xue, Qiang ^{[1
]}

机构：

[1] China Univ Geosci, Fac Mat Sci & Chem, Minist Educ, Engn Res Ctr Nanogeomat, Wuhan 430074, Peoples R China

来源：

CEMENT AND CONCRETE RESEARCH | 2015年 / 67卷

基金：

中国国家自然科学基金;

关键词：

Gypsum; Hydration Products (B); Mechanical Properties (C); Bending strength (C); MECHANICAL-PROPERTIES; MODULUS; HEMIHYDRATE; ELASTICITY; DIHYDRATE; POROSITY;

D O I：

10.1016/j.cemconres.2014.09.004

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

An interesting approach named as "In-situ Loading-Hydration Process" is proposed and demonstrated to develop a new type of compact gypsum product with load-bearing ability, benefited from excellent hardness and bending strength. In detail, bassanite (CaSO4 center dot 0.5H(2)O) is press-formed in a mold and in-situ hydrated into gypsum (CaSO4 center dot 2H(2)O) under the control of loading-pressure. The maximum hardness of 1.47 GPa and bending strength of 17.8 MPa are achieved at the loading pressures of 50 and 20 MPa, respectively. These outstanding mechanical properties of the processed gypsums are mainly attributed to the low-level porosities and interlocking crystal microstructures. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：179 / 183

页数：5

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