Effect of activation conditions of a kaolinite based waste on rheology of blended cement pastes

被引：24

作者：

Banfill, P. F. G. ^{[1
]}

Rodriguez, O. ^{[2
]}

Sanchez de Rojas, M. I. ^{[2
]}

Frias, M. ^{[2
]}

机构：

[1] Heriot Watt Univ, Sch Built Environm, Edinburgh EH14 4AS, Midlothian, Scotland

[2] CSIC, Eduardo Torroja Inst, Madrid 28033, Spain

来源：

CEMENT AND CONCRETE RESEARCH | 2009年 / 39卷 / 10期

关键词：

Rheology; Thermal treatment; Cement paste; Waste paper sludge; SILICA FUME; CLAY WASTE; FLY ASHES; HYDRATION; TEMPERATURE; VISCOSITY; FILLERS; SLUDGE;

D O I：

10.1016/j.cemconres.2009.06.010

中图分类号：

TU [建筑科学];

学科分类号：

081407 [建筑环境与能源工程];

摘要：

This paper reports the influence of calcining temperature on the rheology of blended cement pastes with 10 and 20% of thermally activated paper sludge as pozzolan at water/binder ratio of 0.5 and 0.4. The kaolinite based waste was activated at different activation temperatures (700-800 degrees C) and retention times of 2 and 5 h. The yield stress of the blended pastes increased when the activation intensity increased as a result of the increased calcite and free lime content. Due to the stiffness of the blended pastes, a superplasticiser (sodium lignosulfonate) was used in order to reduce the yield stress. The best results could be obtained using the lower calcining temperature (700 degrees C and 2 h). (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：843 / 848

页数：6

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