Effects of variable temperature on properties of early age concrete

Author(s): J.-E Jonasson, P. Fjellström
Paper category: Conference
Book title: 2nd International conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. Van Breugel, Wei Sun, Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 395-403
Total Pages: 8
Language: English

Abstract: The maturity concept has been used since the 1950’s taking into account variable temperature with respect to rate of hardening, mainly for estimation of the strength growth. However, it is well known that the final strength might decrease using elevated curing temperatures, and sometimes a lower curing temperature might lead to some gain in final strength. The issue of loss of final strength has became a more pronounced question in modern concrete technology, as there is a general trend to use more fine grained cements and additions of fillers or SCM (Supplementary Cementitious Material) like fly ash and slag. The use of SCM is one way of producing more environmental friendly concrete by reduction of the CO2-emission.
In general, the temperature is influencing the formation of the gel products, and consequently temperature is probably one of the decisive parameters controlling the distribution of the pores in the cement paste. This might have impact on a number of properties like drying and belonging deformations as well as the strength growth. This paper focuses on the modelling of the loss of strength at elevated temperatures, as such a tool is a necessary component using modern concretes in for instance massive structures.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00