Effect of mineral filler type on autogenous shrinkage of self-compacting concrete

被引：104
作者：
Craeye, B. [1 ]
De Schutter, G. [1 ]
Desmet, B. [2 ]
Vantomme, J. [2 ]
Heirman, G. [3 ]
Vandewalle, L. [3 ]
Cizer, O. [3 ]
Aggoun, S. [4 ]
Kadri, E. H. [4 ]
机构：
[1] Univ Ghent, Dept Struct Engn, Magnel Lab Concrete Res, B-9052 Ghent, Belgium
[2] Royal Mil Acad, Dept Civil & Mat Engn, Brussels, Belgium
[3] Katholieke Univ Leuven, Dept Civil Engn, Louvain, Belgium
[4] Univ Cergy Pontoise, Lab L2MGC, F-9500 Cergy Pontoise, France
来源：
CEMENT AND CONCRETE RESEARCH | 2010年 / 40卷 / 06期
关键词：
Self-compacting concrete; Filler; Shrinkage; CEMENT PASTES; LIMESTONE FILLER; EARLY AGE; HYDRATION; MICROSTRUCTURE; DEFORMATIONS;
D O I：
10.1016/j.cemconres.2010.01.014
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Based on an experimental programme, including autogenous shrinkage tests on concrete, ultrasonic monitoring of fresh concrete, and mercury intrusion porosimetry, the influence of the filler type on the autogenous shrinkage of self-compacting concrete has been investigated The onset of percolating structure formation (time zero) is influenced by the filler type due to a possible accelerating effect of the filler on the cement hydration. Limestone filler accelerates the hydration process, and reduces time zero, while this is not the case when using quartzite filler Using fly ash, showing only a slight acceleration, a slight reduction of time zero is obtained. A very significant swelling peak is noticed during the first day This swelling peak is not a measuring artefact, but is caused mainly by water absorption on the filler surface and resulting disjoining pressure. Some part of the swelling peak might also be caused by Ca(OH)(2) crystallisation The fineness of the filler is an important factor for this swelling behaviour, although also the nature of the filler seems to have an influence. The superplastioser also interacts with the fillers, influencing the swelling behaviour The different filler types used in this study did not lead to significant differences in critical pore diameter of the microstructure This might explain why no significant differences have been found in final autogenous shrinkage values using the different filler types. (C) 2010 Elsevier Ltd All rights reserved
引用
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页码：908 / 913
页数：6
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