Measuring early-age coefficient of thermal expansion in high-performance concrete

Title: Measuring early-age coefficient of thermal expansion in high-performance concrete
Author(s): Daniel Cusson, Ted Hoogeveen
Paper category : conference
Book title: International RILEM Conference on Volume Changes of Hardening Concrete: Testing and Mitigation
Editor(s): O. M. Jensen, P. Lura, K. Kovler
Print-ISBN: 2-35158-004-4
e-ISBN: 2351580052
Publisher: RILEM Publications SARL
Publication year: 2006
Pages: 321 - 330
Total Pages: 10
Nb references: 11
Language: English

Abstract: This paper presents an experimental approach to determine the coefficient of thermal expansion of concrete at early age, in which a group of three sealed concrete prisms (75×75×295 mm3) are subjected to 25-30°C temperature cycles in an environmental chamber from set time to an age of at least seven days. The concrete deformation is measured with high-precision displacement sensors and the temperature is measured by thermocouples embedded in the concrete prisms. The coefficient of thermal expansion is determined as a function of time by direct calculation on the measured data.
For the high-performance concrete used in this study, it was found that the coefficient of thermal expansion decreased towards a minimum value of 8×10-6/°C one day after the setting of concrete, and then increased linearly until a stable value of 10×10-6/°C was reached at the age of 4 days.

Online publication: 2006-07-30
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580052.034