A Summary of Factors Affecting Concrete Salt-Scaling Performance

This paper compiles results from three different laboratory studies and employs multivariate regression analyses to model the effect of mixture parameters and concrete hardened properties on saltscaling performance. The correlations between concrete hardened properties and mixture proportions were also studied. The modeled mixture parameters included water-cementitious materials ratio (w/cm), slag cement, and air content. Concrete performance was evaluated through abrasion resistance, sorptivity compressive strength, and salt-scaling test c. According to the results obtained in this study concrete scaling perfbrmance is a*.cted, in the onkr of importance, by wicm, slag-cement replacement, and air content. In addition, concrete hardened properties, especially abrasion resistance, werefound u,seful in making reliable salt-scaling predictions. Based on the results derived from the regression analyses and the discussions provided in the reviewed literature, recommendations are given for proportioning of concrete to obtain adequate performance with respect to compressive strength, abrasion resistance, sorptivity and salt-scaling resistance. In addition, the relationship be concrete properties, ingredients, and effective mechanisms are investigated.