Journal of Advanced Concrete Technology
Online ISSN : 1347-3913
ISSN-L : 1346-8014
Scientific paper
Impacts of Trace Additives and Early-Stage Curing Conditions on the Shrinkage Cracking Resistance of Blast-Furnace Slag Cement Concrete
Tetsushi KandaHaruki MomoseKohsuke IshizekiKei-ichi ImamotoChizuru Kiyohara
Author information
JOURNAL FREE ACCESS

2016 Volume 14 Issue 8 Pages 475-488

Details
Abstract

Medium volume blast furnace slag concrete has been highly expected to reduce carbon dioxide emission in concrete production, while it was found that this concrete was prone to shrinkage cracking specifically under hot summer climates. To improve this negative performance, this study focused on the utilization of trace additives and water curing. The trace additives were gypsum and calcium carbonate, with which binder is called low shrinkage BFS. Furthermore, to reduce prominent autogenous shrinkage, initial water curing was investigated. As a result, combination of low shrinkage BFS and water curing was found to significantly strengthen shrinkage cracking resistance, which was expressed by cracking age resulted in restrained shrinkage cracking tests. Furthermore, curing experiment showed that water curing may be substituted by water covered curing on element surface in construction site as a simple and economical measure to supply water to concrete at initial stage of hardening.

Content from these authors
© 2016 by Japan Concrete Institute
Previous article Next article
feedback
Top