Cracking characteristics of cement mortars subjected to restrained shrinkage

Author(s): M. Chilwesa, H. Beushausen
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: 389- 390
Total Pages: 2
Language: English

Restrained shrinkage cracking in bonded overlays including patch repairs is a serious problem that compromises overlay and patch performance. In this study, cracking characteristics of cement mortars subjected to retrained shrinkage were investigated. Five mortar types were subjected to a restrained shrinkage test, the ring test, in order to determine their age at cracking and extent of cracking (crack area). Material properties such as free shrinkage, elastic modulus, tensile relaxation and tensile strength were also measured in order to determine their influence on overlay cracking. The experimental results indicate that crack resistance of overlays depends upon the combined influence of the different material properties. In particular, tensile stress relaxation appears to have the largest influence.

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