The influence of blast-furnace slag hydration products on microcracking of concrete

被引：18

作者：

Bohac, Martin ^{[1
]}

Gregerova, Miroslava ^{[1
]}

机构：

[1] Masaryk Univ, Fac Sci, Dept Geol Sci, CS-61137 Brno, Czech Republic

来源：

MATERIALS CHARACTERIZATION | 2009年 / 60卷 / 07期

关键词：

BFS; Hydration products; Microcracking; Concrete; EMPA; C-S-H; MICROSTRUCTURE; STRENGTH; MORTARS; CEMENTS; PASTES;

D O I：

10.1016/j.matchar.2008.11.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

New hydration products of ground granulated blast-furnace slag are formed during the hydration process of Portland slag cement concrete. Spatial distribution of microcracks in concrete is related also to newly formed slag hydrates. The chemical composition of hydration products is variable and unstable. The Si/Ca ratios rise in hydration products near the unhydrated slag core significantly. There is also a certain increase of Mg and Al content in the central parts of hydration rims. The scope of the paper is to find a relation between slag hydration products and the process of microcracking. The amount of microcracks was reduced in concretes with a lower content of vitreous fraction where the slag basicity was high. Neoformation of hydration products is accompanied by volume changes, which can lead to concrete microcracking. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：729 / 734

页数：6

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