Experimental study of aggregate size effects on mechanical behaviour and permeability of concrete

Author(s): A. Fabien, M. Choinska, S. Bonnet, A. Pertué, A. Khelidj
Paper category: Conference
Book title: 2nd International conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. Van Breugel, Wei Sun, Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 412-420
Total Pages: 8
Language: English

Abstract: 
Nowadays, number of boat storage places becomes insufficient in many harbours. In this context, a new concept of harbour construction has been developed and patented. The space arrangement will be achieved by a vertical structure made in reinforced concrete molded walls. Their dimensions are very important: the diameter may reach 90 m and the depth 45 m. In order to be able to correlate laboratory test results with in situ realization, a study of size effects on concrete behaviour has been undertaken.

Generally two approaches may be considered to study size effects: one based on the change of specimen size, and the other based on the variation of aggregate size. In this study, we have considered the second one and three concretes with different aggregate size have been used. Three concretes specimens have been submitted to cyclic compressive loading and elastic modulus loss is choosen as damage indicator; tightness indicator is gas permeability. First results indicate an aggregate size effect on compressive strength and permeability. Also the contributions of the damage and the aggregate size on concrete permeability may be separated.

Key words: concrete, size effects, aggregate size, compressive behaviour, damage, gas permeability

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00