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: Proceedings of the 71st RILEM Annual Week & ICACMS 2017,Chennai,India, 3rd -8th September 2017
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: Published by RILEM Publications S.A.R.L.
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