Thermal expansion of high-performance cement paste and mortar at early age

Author(s): M. Wyrzykowski, P. Lura
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: 499- 500
Total Pages: 2
Language: English

Abstract: 
Self-desiccation in high performance concrete may lead not only to autogenous shrinkage, but at the same time may also increase the risk of thermal cracking of the material. It is well known that the thermal expansion coefficient, which describes the deformation of the material due to a unit temperature change, increases considerably with a drop of water saturation in the pores. Hence it is expected that an increase will also accompany the self-desiccation process. In this work, an experimental investigation regarding the evolution of the thermal expansion coefficient in cement paste and mortar is presented. Results of the volumetric method for determining the coefficient of thermal dilation are verified with measurements of relative humidity evolution in cement pastes exposed to changing temperature. The observed change of RH due to temperature change is substantially higher than reported in the literature; however it can be directly correlated with the measured thermal expansion coefficient.

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