Combined Effect of Internal Curing and Shrinkage-Reducing Admixture on Cracking Potential of High-Strength Concrete

Title: Combined Effect of Internal Curing and Shrinkage-Reducing Admixture on Cracking Potential of High-Strength Concrete
Author(s): S. Zhutovsky, K. Kovler
Paper category : conference
Book title: International RILEM Conference on Material Science
Editor(s): W. Brameshuber
Print-ISBN: 978-2-35158-110-0
e-ISBN: 978-2-35158-111-7
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 165 - 174
Total Pages: 10
Nb references: 46
Language: English

Abstract: Internal curing technology has been developing to counteract autogenous shrinkage of high-strength concrete (HSC). In literature the total shrinkage of internally cured concrete is reported to be almost unchanged after exposure to drying. On the other hand, tensile creep increase is reported in the literature. Since tensile creep can improve the cracking resistance, the effect of internal curing on restrained drying shrinkage of concrete arouses considerable interest. The restrained drying shrinkage of concrete made at water to cement ratio of 0.33 internally cured by means of water-saturated lightweight aggregate (pumice) and super-absorbent polymer and their combination with shrinkage reducing agent was studied in this research. In parallel, compressive and tensile splitting strength, free drying shrinkage and mass loss of the same concrete mixes were tested. The experimental results demonstrate that combining internal curing with shrinkage reducing admixture is extremely effective in reducing cracking potential of HSC exposed to drying under restrained conditions.

Online publication: 2010-12-02
Publication type : full_text
Public price (Euros): 0.00