Numerical modelling of volume changes at early ages - Potential, pitfalls and challenges

Title: Numerical modelling of volume changes at early ages - Potential, pitfalls and challenges
Author(s): K. van Breugel
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 34
Issue: 239
Issue date: 2001-06-01
Publication year: 2001
Pages: 293 - 301
Total Pages: 9
Nb references: 33
Language: English

Abstract: For quantification of early deformations of hardening cement-based systems a number of conceptual and numerical models have been proposed.
In this contribution some aspects of these models will be discussed and evaluated with respect to the mechanisms that are considered to be responsible for volume and length changes at early ages.
Emphasis will be on systems hydrating under sealed conditions.
The fact that volume changes at early ages,and more in particular autogenous shrinkage, should be considered as the response of a continuously changing system is discussed.
These changes concern at least the pore system and the state of moisture in the pore system.
Numerical models should,therefore,be able to simulate the evolution of the pore system with progress of the hydration process explicitly.
Parallel with the modelling of the evolution of the pore system,c.
q.
the microstructure,the state of stress and associated deformations should be considered.
The potential of numerical simulation models to deal with this coupled problem is discussed.
Pitfalls encountered when developing and validating numerical simulation models will be addressed and discussed.
The potential of numerical models is illustrated with examples.

Online publication: 2001-04-27
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/13759