COMPATIBILITY OF REPAIR CONCRETES IN THE AGGRESSIVE ENVIRONMENT OF THE SOUTH OF IRAN.

Deterioration of reinforced concrete structures, namely due to corrosion of reinforcement, in the south of Iran, on the coasts of the Gulf region has become a major problem in recent years. The high cost involved in repairing and strengthening of deteriorated concrete structures in this region makes it essential that the repair materials used are compatible enough to match the residual service life of the structure. This paper presents the engineering and compatibility-related properties of two repair concretes containing silica fume and styrene butadiene rubber latex (SBR) under simulated hot and humid conditions similar to the aggressive environment of the south of Iran. A normal cement-based repair concrete was used as control. Mechanical properties were assessed and the dimensional stability of the repair concretes was also evaluated. The results of this investigation show that the concrete containing silica fume and the polymer-modified concrete are appropriate materials for repair in the severe environmental conditions of the Gulf region. [ABSTRACT FROM AUTHOR]