Crack propagation in concrete at early ages

Dao, Vinh, Morris, Peter H. and Dux, Peter F. (2013). Crack propagation in concrete at early ages. In: Vinh Dao and Peter Dux, 26th Biennial Conference of the Concrete Institute of Australia Conference Proceedings. 26th Biennial Conference of the Concrete Institute of Australia, Gold Coast , Australia, (). 16-18 October 2013.

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Name Description MIMEType Size Downloads
Author Dao, Vinh
Morris, Peter H.
Dux, Peter F.
Title of paper Crack propagation in concrete at early ages
Conference name 26th Biennial Conference of the Concrete Institute of Australia
Conference location Gold Coast , Australia
Conference dates 16-18 October 2013
Proceedings title 26th Biennial Conference of the Concrete Institute of Australia Conference Proceedings
Place of Publication North Sydney, Australia
Publisher Concrete Institute of Australia
Publication Year 2013
Sub-type Fully published paper
ISBN 9781877040733
Editor Vinh Dao
Peter Dux
Total pages 10
Collection year 2014
Language eng
Formatted Abstract/Summary
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 minimizing this form of cracking is highlighted. These include proper compaction and effective curing as well as timely and adequate saw-cutting.
Keyword Early-age cracking
Concrete
Curing
Compaction
Fracture mechanics
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Civil Engineering Publications
Official 2014 Collection
 
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Created: Wed, 22 Jan 2014, 12:02:41 EST by Julie Hunter on behalf of School of Civil Engineering