Yield stress and bleeding of fresh cement pastes

被引：224

作者：

Perrot, A. ^{[2
]}

Lecompte, T. ^{[2
]}

Khelifi, H. ^{[2
]}

Brumaud, C. ^{[1
]}

Hot, J. ^{[1
]}

Roussel, N. ^{[1
]}

机构：

[1] Univ Paris Est, IFSTTAR, Paris, France

[2] Univ Bretagne S, LIMat B, Lorient, France

来源：

CEMENT AND CONCRETE RESEARCH | 2012年 / 42卷 / 07期

关键词：

Rheology; Bleeding; Admixture; Yield stress; RHEOLOGICAL BEHAVIOR; SUSPENSIONS; THIXOTROPY; SUPERPLASTICIZERS; VISCOSITY; CONCRETE; SLUMP; YODEL; MODEL;

D O I：

10.1016/j.cemconres.2012.03.015

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

We focus in this paper on a potential correlation between yield stress and bleeding. We suggest that the conditions under which a fresh cement paste is able to display a yield stress result from the competition between Brownian motion and colloidal interactions whereas the conditions under which the suspension is stable result from the competition between colloidal interactions and gravity. These competitions highly depend on the solid volume fraction of the system and on the polymer surface coverage. The correlation between yield stress and bleeding is therefore very indirect and difficult to use in practice. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：937 / 944

页数：8

共 36 条

[1] RHEOLOGICAL PROPERTIES OF CEMENT MIXES - DISCUSSION [J].