|
Titre :
|
Influence of aggregate size and volume fraction on shrinkage induced micro-cracking of concrete and mortar
|
|
Auteurs :
|
Peter Grassl, Auteur ;
Hong S. Wong, Auteur ;
Nick R. Buenfeld, Auteur
|
|
Type de document :
|
Article : texte imprimé
|
|
Dans :
|
Cement and concrete research (Vol. 40 N° 1, Janvier 2010)
|
|
Article en page(s) :
|
pp. 85-93
|
|
Note générale :
|
Génie Civil
|
|
Langues :
|
Anglais
|
|
Index. décimale :
|
691 (Matériaux de construction. Pièces et parties composantes)
|
|
Tags :
|
Microcracking Interfacial transition zone Transport properties Shrinkage Aggregate Lattice modelling
|
|
Résumé :
|
In this paper, the influence of aggregate size and volume fraction on shrinkage induced micro-cracking and permeability of concrete and mortar was investigated. Nonlinear finite element analyses of model concrete and mortar specimens with regular and random aggregate arrangements were performed. The aggregate diameter was varied between 2 and 16 mm. Furthermore, a range of volume fractions between 0.1 and 0.5 was studied. The nonlinear analyses were based on a 2D lattice approach in which aggregates were simplified as monosized cylindrical inclusions. The analysis results were interpreted by means of crack length, crack width and change of permeability. The results show that increasing aggregate diameter (at equal volume fraction) and decreasing volume fraction (at equal aggregate diameter) increase crack width and consequently greatly increases permeability.
|
|
DEWEY :
|
620.13
|
|
ISSN :
|
0008-8846
|
|
En ligne :
|
http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235562%232010%23999599998%231564180%23FLA%23&_cdi=5562&_pubType=J&_auth=y&_acct=C000070790&_version=1&_urlVersion=0&_userid=6909337&md5=3bf7bffae0859272cf83e37c4a3bac6c
|
