Efficiency of internal curing with water-saturated lightweight aggregates in terms of autogenous shrinkage reduction

Title: Efficiency of internal curing with water-saturated lightweight aggregates in terms of autogenous shrinkage reduction
Author(s): Konstantin Kovler, Arnon Bentur
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: 107 - 115
Total Pages: 9
Nb references: 6
Language: English

Abstract: The experimental methods of measuring autogenous deformation and quantifying efficiency of internal curing (IC) in terms of autogenous shrinkage reduction are reviewed. The focus of the paper is the efficiency factor of internal curing, which is intended to reflect a fraction of water absorbed in saturated particles of the IC agent that becomes effective to counteract self-desiccation. It is shown that the efficiency factor of IC is the result of complex interactions and is not only dependent on the properties and quantity of the IC agent. The results of measuring autogenous deformation in concrete made at two water to cementitious material ratio (0.33 and 0.25) and calculations of the required content of IC agent – watersaturated LWA aggregate (pumice), based on the knowledge of the efficiency factor of internal curing are presented. The effects of internal curing on compressive strength are discussed.

Online publication: 2006-07-30
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580052.012