Evolving performance based environmental classifications for chloride exposure

Author(s): B S Dhanya, Manu Santhanam, Santosh Cheriyan
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials Systems and Structures (SMSS2019) Durability, Monitoring and Repair of Structures
Editor(s): Ana Baričević, Marija Jelčić Rukavina, Domagoj Damjanović, Maurizio Guadagnini
ISBN: 978-2-35158-217-6
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 247-254
Total Pages: 813
Language: English

Abstract: Corrosion of reinforcement in reinforced concrete structures is a matter of pervasive concern to the engineers, owing to its huge economic implications. Of the two major causes of corrosion, chloride induced corrosion is more dangerous because of its pitting nature. This is the major cause of deterioration of reinforced concrete structures in countries having a long coastline. The present paper discusses the performance of four commonly used accelerated test methods such as Wenner 4-probe resistivity, rapid chloride permeability test, rapid migration test and chloride conductivity test to assess chloride ingress into concretes which are having different supplementary cementitious materials such as slag, Class F fly ash and Class C fly ash. The correlations between different test results were explored. Using the results, a new classification criterion is proposed for concrete quality (considering chloride penetration resistance). The criterion combines both surface resistivity and one of the other durability parameters based on conduction/migration such as charge passed, non-steady state migration coefficient or chloride conductivity.

Online publication :2019
Publication type : full_text
Public price (Euros) : 00