Growth morphology of gypsum in the presence of copolymers

被引：15

作者：

Montagnino, D. ^{[1
]}

Costa, E. ^{[1
]}

Massaro, F. R. ^{[2
]}

Artioli, G. ^{[3
]}

Aquilano, D. ^{[1
]}

机构：

[1] Univ Turin, Dipartimento Sci Mineral & Petrol, I-10125 Turin, Italy

[2] Univ Milano Bicocca, Dipartimento Sci Mat, I-20125 Milan, Italy

[3] Univ Padua, Dipartimento Geosci, I-35137 Padua, Italy

来源：

CRYSTAL RESEARCH AND TECHNOLOGY | 2011年 / 46卷 / 10期

关键词：

gypsum; crystal growth; habit modification; copolymers; SCANNING FORCE MICROSCOPY; CALCIUM-SULFATE DIHYDRATE; THEORETICAL APPROACH; CRYSTAL-SURFACE; ADDITIVES; CRYSTALLIZATION; ADSORPTION; DISSOLUTION; CASO4.2H2O; SODIUM;

D O I：

10.1002/crat.201100131

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Gypsum is the most abundant natural sulphate, and in industrial application it plays an important role in gypsum based binders. Furthermore, it plays a critical role in the hydration of Portland cement, and then gypsum is one of the most important cement additive. In this paper we investigated the role of two commercial polymeric additives in modifying the crystal habits and size of gypsum, growth in aqueous solution. These two additives belong to the categories of acrylic polymers and they are known only by their commercial names of SP1 and SP3. We found that these substances can act as shape modifiers mainly at concentration over 0.04% by weight, with a shortening in the elongation of gypsum crystal and some change in the characters of {001} form, from stepped to flat, due to a change in the growth mechanism. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1010 / 1018

页数：9

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