Chloride Ingress in Concrete: Effect of Mix Parameters, Heating Condition and Exposure Solution

Author(s): Prof. Bulu Pradhan and Arya Anuj Jee
Paper category: Proceeding
Book title: International Conference on Advances in Civil Engineering and Sustainable Construction
Editor(s): T.Ch. Madhavi, G. Prabhakar, Santhosh Ram, and P.M. Rameshwaran
Print-ISBN: None
e-ISBN: 978-2-35158-161-2
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 23-29
Total Pages : 7
Language : English

Abstract: In this study, influence of cement type, heating of concrete and composite chloride-sulfate solution on chloride ingress in concrete was investigated. The various concrete mixes were prepared by using ordinary Portland cement (OPC) and Portland pozzolana cement (PPC) with w/c ratios of 0.55 and 0.60. The test specimens were subjected to laboratory drying and oven drying (at 150°C) before exposing to chloride and composite chloride-sulfate solutions with alternate wetting and drying cycles. The error function solution of Fick’s 2nd law of diffusion was used for estimation of surface chloride concentration and chloride diffusion coefficient. From the results, it is observed that chloride ion penetration resistance decreased with increase in sulfate ion concentration and w/c ratio and, with heating of concrete, thus resulting in higher chloride diffusion coefficient. OPC specimens exhibited higher chloride diffusion coefficient as compared to PPC specimens in unheated condition, whereas the opposition was observed in case of oven dried (150°C) specimens.

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