Influence of organic admixtures on the rheological behaviour of cement pastes

被引：98

作者：

Phan, T. H. ^{[1
]}

Chaouche, M. ^{[1
]}

Moranville, M. ^{[1
]}

机构：

[1] Univ Paris 06, CNRS, ENS Cachan, Lab Mech & Technol, F-94235 Cachan, France

来源：

CEMENT AND CONCRETE RESEARCH | 2006年 / 36卷 / 10期

关键词：

cement paste; rheology; high-range water reducers; viscosity modifying admixture;

D O I：

10.1016/j.cemconres.2006.05.028

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The rheological properties of cementitious pastes used to proportion Self-Consolidating Concretes (SCC) have been examined, in particular, the influence of High range water reducing admixture (HRWRA) with that of Viscosity Modifying Admixtures (VMAs) have been compared. HRWRAs are known to have dispersing effects on the cement particles through steric and/or electrostatic repulsion, while the effects of VMAs are expected to stabilise the paste by increasing the viscosity of the aqueous solution. Both transient and steady state rheological, behaviour of the cementitious pastes proportioned with different dosages of HWRA and VMA were considered. Experimental results show that the influence of VMAs on rheological properties is actually minor compared to that of HRWRAs. These results are discussed in the framework of rheology of concentrated suspensions. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1807 / 1813

页数：7

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