101. Assessment of the durability of medium strength SCC from its permeation properties

Title: 101. Assessment of the durability of medium strength SCC from its permeation properties
Author(s): M. Sonebi, R. Ibrahim
Paper category : conference
Book title: 5th International RILEM Symposium on Self-Compacting Concrete
Editor(s): G. De Schutter and V. Boel
Print-ISBN: 978-2-35158-047-9
e-ISBN: 978-2-35158-088-2
Publisher: RILEM Publications SARL
Publication year: 2007
Pages: 677 - 682
Total Pages: 6
Nb references: 13
Language: English

Abstract: Permeability of concrete is influenced by the porosity and the interconnectivity of pores in the cement paste and the micro-cracks in concrete, especially the interface of paste-aggregate.
The movements of gases, liquids and ions trough concrete is important because of their interactions with concrete constituents and the pore water which can alter the integrity of concrete directly and indirectly, leading to the deterioration of structures. This paper reports the results of an investigation of the effect of type of mineral admixtures such as limestone powder (LSP) and pulverized fly ash (PFA) and viscosity modifying admixture (VMA) such as diutan gum on the durability of medium strength self-compacting concrete (SCC). The air permeability, water permeability, capillarity absorption, and in-situ chloride diffusion were used to assess SCC and compare to normal concretes. The results showed that SCC mixes using PFA flowed by limestone powder had better transports properties compare to normal concretes and SCC made with VMA had a higher sorptivity and air and water permeability.
The in-situ chloride migration indicated that SCC made with PFA showed much lower in-situ migration compared to other mixes and SCC with VMA had higher chloride migration coefficient.

Online publication: 2009-06-16
Publication type : full_text
Public price (Euros): 0.00