Crack propagation in concrete at very early ages

Dao, Vinh T. N., Dux, Peter F. and Morris, Peter, H. (2014) Crack propagation in concrete at very early ages. Magazine of Concrete Research, 66 13: 643-651. doi:10.1680/macr.13.00205

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Author Dao, Vinh T. N.
Dux, Peter F.
Morris, Peter, H.
Title Crack propagation in concrete at very early ages
Journal name Magazine of Concrete Research   Check publisher's open access policy
ISSN 0024-9831
1751-763X
Publication date 2014-01-01
Year available 2014
Sub-type Article (original research)
DOI 10.1680/macr.13.00205
Open Access Status File (Publisher version)
Volume 66
Issue 13
Start page 643
End page 651
Total pages 9
Place of publication London, United Kingdom
Publisher I C E Publishing
Collection year 2015
Language eng
Abstract Surface defects and cracks in early-age concrete slabs have been observed to propagate under adverse conditions, impairing the performance and service life of these structures. However, the underlying mechanism of this form of crack propagation has remained largely unexplained, with very limited literature available. In this paper, simple yet sufficiently rigorous theoretical analyses of crack propagation in early-age concrete slabs, based on combined geotechnical engineering and fracture mechanics models, are presented. The results obtained clearly show how surface cracks can become unstable and propagate further, and either become stable again or develop through the full depth of the slab. They also convincingly demonstrate the roles of surface cracks and defects, pore moisture suctions and exposure conditions in this process. Importantly, the critical role of good construction practices in minimising this form of cracking is highlighted. These include proper compaction and effective curing as well as timely and adequate saw-cutting.
Keyword Crack propagation
Concrete
Geotechnical engineering
Fracture mechanics
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 08 Oct 2014, 06:11:20 EST by Jeannette Watson on behalf of School of Civil Engineering