Rheology of geopolymer by DOE approach

被引：97

作者：

Romagnoli, Marcello ^{[1
]}

Leonelli, Cristina ^{[1
]}

Kamse, Elie ^{[1
]}

Gualtieri, Magdalena Lassinantti ^{[1
]}

机构：

[1] Univ Modena & Reggio Emilia, Dipartimento Ingn Mat & Ambiente, I-41125 Modena, Italy

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2012年 / 36卷

关键词：

Alkali activated cement; Rheology; Aging; Modeling; SUSPENSIONS; TECHNOLOGY;

D O I：

10.1016/j.conbuildmat.2012.04.122

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The effects of solid/liquid content, temperature, curing time and deflocculant concentration on some fundamental rheological parameters of metakaolin-based geopolymer suspensions activated by NaOH were studied by statistical DOE approach. Solid content appears to be the most important parameter among the studied ones. As well known, it has an influence both on viscosity, shear behaviour and yield stress. Instead the additive, an industrial grade sodium polyacrilate, has demonstrated to have a poor effect on the viscosity and yield stress. In synergy with curing time, temperature showed a different effect with respect to its classic rheological influence. In countertrend, increasing the temperature resulted in an increased viscosity due to acceleration of the geopolymerisation reactions. Rheological parameters have proven to be very sensitive to chemical changes in the studied system. In combination with DOE methodology, it is a potent tool for monitoring the microstructural evolution of geopolymers during curing. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：251 / 258

页数：8

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