Study on chloride binding of self-compacting concrete with different crack lengths: non-steady state migration test

Title: Study on chloride binding of self-compacting concrete with different crack lengths: non-steady state migration test
Author(s): S. Mu, G. De Schutter, and B. G. Ma
Paper category : conference
Book title: International RILEM Conference on Advances in Construction Materials Through Science and Engineering
Editor(s): Christopher Leung and K.T. WAN
ISBN: 978-2-35158-116-2
e-ISBN: 978-2-35158-117-9
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 263 - 270
Total Pages: 8
Nb references: 6
Language: English

Abstract: Concrete cracks, caused by mechanical loading, thermal stresses, shrinkage etc., can provide some shortcuts for aggressive substances to reach the surface of rebars and initiate corrosion. The present paper investigates the chloride binding of self-compacting concrete with different crack lengths using non steady state migration test. The obtained experimental results are further analysed. For the crack length, we adopted a non-destructive notch method to prepare different crack lengths from 20 mm to 100 mm, at a crack width of 0.2 mm and a crack depth of 20 mm. The chloride binding properties are characterized by experimental determination of the concentrations of water soluble chloride and acid soluble chloride. The relation between water soluble chloride and acid soluble chloride is further investigated. The results show that the non-destructive notch method is a good way to quantitatively study the influence of crack on concrete property. Secondly, Freundlich and Langmuir binding isotherms were better than the linear binding isotherms to match results in cracked concrete. Thirdly, the influence of crack length on chloride binding of concrete is not significant in this present research.

Online publication: 2011-10-31
Publication type : full_text
Public price (Euros): 0.00