A model for the prediction of plastic shrinkage cracking in concrete

Author(s): W.P. Boshoff, R. Combrinck, J. Maritz
Paper category: Conference
Book title: Concrete Repair, Rehabilitation and Retrofitting III (ICCRRR)
Editor(s): M.G. Alexander, H.-D. Beushausen, F. Dehn, P. Moyo
Print ISBN: 978-0-415-89952-9
Publisher: Taylor & Francis Group
Pages: 146 – 147
Total Pages: 2
Language: English

Plastic Shrinkage Cracking (PShC) of concrete with large surface areas has been a problem for many years. It is known to increase in severity when the concrete surface is exposed to environmental conditions which result in high evaporation rates. However, the severity of PShC cannot always be directly linked to the evaporation rate. Many other factors have a strong influence, e.g. the initial set time and the bleeding. A new model, PShC Severity, is proposed which is shown in this paper to give a good indication of the PShC to be expected. It is based on the evaporation rate, total bleeding volume and initial set time of the concrete. It iss further shown that the PShC is reduced by adding a low-volume of fibres to the concrete. The reduction is shown to be more significant the higher the volume of fibres.

Online publication: 2014
Publication Type: abstract_only
Public price (Euros): 0.00