Experimental evaluation of mitigation of autogenous shrinkage by means of a vertical dilatometer for concrete

Title: Experimental evaluation of mitigation of autogenous shrinkage by means of a vertical dilatometer for concrete
Author(s): Bart Craeye, Geert De Schutter
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: 21 - 30
Total Pages: 10
Nb references: 10
Language: English

Abstract: In order to study autogenous shrinkage of hardening concrete, a new dilatometer has been developed at the Magnel Laboratory for Concrete Research, Ghent University, Belgium. Within the newly developed dilatometer, the fresh concrete is cast into a vertical Teflon tube. After compaction on a vibrating table, the concrete sample is placed into the measuring frame, inside a climate room. Linear vertical shrinkage measurements can start immediately after casting, by means of LVDT-transducers. Temperature measurements are realised in parallel, in order to take into account the effect of the heat of hydration on the autogenous shrinkage results. With this dilatometer, the mitigation of autogenous shrinkage by means of saturated lightweight aggregate particles and super absorbing polymers has been studied experimentally. Two different types of lightweight aggregates and one type of super absorbing polymer have been considered. The application of theoretical formulas, predicting the required content of internal curing water in order to compensate for the autogenous shrinkage has been evaluated. The application of saturated lightweight aggregates and super absorbing polymers proves to be a good technique in order to reduce autogenous shrinkage.

Online publication: 2006-07-30
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580052.003