US EPA

454571 

Journal Article 

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

Bohac, M; Gregerova, M 

2009 

ELSEVIER SCIENCE INC 

NEW YORK 

60 

7 

729-734 

English 

10.1016/j.matchar.2008.11.011 

WOS:000266997200017 

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. 

BFS; Hydration products; Microcracking; Concrete; EMPA; c-s-h; microstructure; strength; mortars; cements; pastes 

11th Euroseminar on Microscopy Applied to Building Materials 

Porto, PORTUGAL