The role of microstructural development on creep and relaxation of hardening concrete

Title: The role of microstructural development on creep and relaxation of hardening concrete
Author(s): K. van Breugel, S.J. Lokhorst
Paper category : conference
Book title: International RILEM Conference on Early Age Cracking in Cementitious Systems
Editor(s): K. Kovler and A. Bentur
Print-ISBN: 2-912143-29-2
e-ISBN: 2351580362
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 3 - 10
Total Pages: 8
Nb references: 12
Language: English

Abstract: In this contribution an attempt is made to describe creep and relaxation of hardening concrete as a function of the continuously changing microstructure of the cement paste. A main assumption is that hydration products are formed in a stress-free state. With progress of the hydration process these initially stress-free hydration products will become load-bearing. For quantifying the amount of load-bearing gel and changes thereof, the development of the microstructure of the hydrating paste is determined with the numerical simulation model HYMOSTRUC. Specific features of the proposed creep model are dealt with and examples of creep tests and stress predictions in hardening concrete are presented. The consistency of the model will be discussed and evaluated. In the evaluation the consequences of the formation of hollow shells (Hadley grains) on the consistency of the model is addressed.

Online publication: 2010-06-02
Publication type : full_text
Public price (Euros): 0.00