A Study on Chloride Content for Corrosion of Reinforcing Steel in Concrete
Date Issued
2012
Date
2012
Author(s)
Tai, Chun-Hsuan
Abstract
The subject of the thesis is to study the effect of different mix proportion on the durability of concrete through setting several w/b ratio (0.35, 0.45, 0.55, 0.65) and pozzolanic material substitution (fly ash replaces cement for 10%, 20%, 30%; slag replaces cement for 15%, 30%, 50%). Salt ponding test was conducted to simulate the situation of exposure to chloride of specimen, and to judge the ability of concrete of resisting chloride permeation and the capability of protecting reinforcing steel from corrosion. Besides, Gecor 8, made by James Instruments, was used to determine the corrosion trend of the reinforceing steel in concrete by measuring the corrosion rate, corrosion potential and electrical resistance. Furthermore, concrete compressive strength test, chloride ion content titration and acid-base titration were conducted to judge the degree of reinforcing steel protection by concrete.
Subjects
durability
chloride content
salt ponding test
rebar corrosion
measurement of corrosion current
Type
thesis
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