Chloride Profiling of Integral and Non-Integral Surface Treated Foamed Concrete

Author(s): Algurnon S. van Rooyen and Gideon P.A.G. van Zijl
Paper category: Proceedings
Book title: Advances in Construction Materials and Systems, Vol.4
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN: 978-2-35158-196-4
ISBN: 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 36-41
Total Pages: 6
Language : English

Abstract: Foamed concrete (FC) is a lightweight concrete that consists of only binder, water, filler and 20 % or more air by volume. FC has several advantages over normal weight concrete, which includes reduced weight, lower coefficient of thermal conductivity, good flowability and can be designed to contain high percentages of industrial waste (i.e., pulverised coal ash). However, due to the high percentage of air voids in foam concrete, several disadvantages
arise of which durability is of major concern. As an example, ease of penetration of fluids and gases can lead to chloride or carbonation induced corrosion of reinforcement. These concerns are preventing the use of foamed concrete for structural purposes. The study therefore aims to address one of the durability concerns, namely chloride induced corrosion, by performing
ponding tests (cyclic wetting) on cracked and un-cracked, untreated and surface treated foamed concrete. Chloride penetration profiles will be recorded via XRF testing and corrosion rate monitoring via a coulostatic method. Surface treated specimens yielded lower corrosion rates. Chloride penetration has decreased significantly with the use of surface treatment agents. Silane based STA performed the best overall.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00