Influences of heat of hydration on autogenous shrinkage induced stresses in reinforced high strength concrete columns at early ages.

Title: Influences of heat of hydration on autogenous shrinkage induced stresses in reinforced high strength concrete columns at early ages.
Author(s): Keiichi Imamoto
Paper category : conference
Book title: International RILEM Symposium on Concrete Science and Engineering: A Tribute to Arnon Bentur
Editor(s): J. Weiss, K. Kovler, J. Marchand, and S. Mindess
Print-ISBN: None
e-ISBN: 2912143926
Publisher: RILEM Publications SARL
Publication year: 2004
Nb references: 6
Language: English

Abstract: This paper deals with autogenous shrinkage induced stresses in reinforced high-strength concrete columns. Two full sized reinforced concrete columns were constructed; one was constructed in summer and the other was constructed in winter. The influence of heat of hydration on the magnitude of the shrinkage induced stress was investigated, measuring steel strains of reinforcing bars of the column. In addition, elastic modulus and creep of concrete at early ages were tested. Test results showed that the magnitude of autogenous shrinkage induced stress in summer was higher than that in winter. On the other hands, elastic modulus of concrete in summer developed more rapidly than that in winter. It was found that the heat of hydration strongly affected the autogenous shrinkage induced stress as well as elastic modulus and creep of concrete. Using of the mechanical information of concrete at early ages, a step-by-step analytical method well simulated the autogenous shrinkage induced stresses of these columns.

Online publication: 2004-03-25
Classification: Mixture Proportions and Case Studies
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143926.034