Title:
Corrosion Protection of Reinforcement in
Modified High-Alumina Cement Concrete
Author(s):
Yan Fu, Jian Ding,a nd James J. Beaudoin
Publication:
Materials Journal
Volume:
93
Issue:
6
Appears on pages(s):
609-612
Keywords:
chlorides; corrosion; C3AH6; high-alumina cements; rein-forced
concrete.
DOI:
10.14359/9867
Date:
11/1/1996
Abstract:
Corrosion characteristics of reinforcement in modijed high-alumina cement (HAC) containing a conversion-preventing additive (CPA) was studied. An investigation was carried out using ordinary portland cement, high-alumina cement, and modijed high-alumina cement. Results including compressive strength, bond strength, porosity, Cl- permeability, and extent of steel bar corrosion are presented. The effect of a deicing salt, calcium chloride, on formation of hydrogarnet and stratlingite in HAC and modijed HAC mortars is also reported. This work indicates that HAC mortal; after conversion, is unable to protect the reinforcement from corrosion in an environment containing chloride ions. Conversion-inhibited high-alumina cement has the capability of protecting the reinforcement from corrosion under severe test conditions due to its effective resistance to the penetration of chloride ions.