Influence of mix composition on early-age autogenous deformations of cement pastes

Title: Influence of mix composition on early-age autogenous deformations of cement pastes
Author(s): Patrick Fontana, Birgit Meng
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: 261 - 272
Total Pages: 12
Nb references: 16
Language: English

Abstract: The influence of the mix composition on the early-age deformations of the cement paste matrix of high-strength and self-compacting concretes has been investigated. Linear deformation measurements were started prior to setting. Setting (distinction between plastic and stress inducing shrinkage) was determined by analysis of deformation velocity. The measured deformations were linked to the hydration of the binders and to the structural properties of the hardening pastes. The effect of mineral and organic additives on the cement hydration was systematically assessed with isothermal calorimetry and thermogravimetric analysis. Based on hydration data the capillary tension (as the presumed main driving force of autogenous shrinkage) was estimated using pore structure data determined by mercury intrusion porosimetry. From the results conclusions were drawn on the deformation behaviour of the cement pastes.

Online publication: 2006-07-30
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580052.028