Abstract
Supersulfated cement (SSC) is potentially an environmentally attractive alternative to portland cement for use in concrete as it is mainly composed of industrial by-product granulated iron blast-furnace slag and calcium sulfate, with only a small amount of alkali activator. The low-alumina content (<11%), slags produced in North American blast furnaces do not possess the optimum chemical composition for strength development when used in SSC. The main purpose of this study was to investigate the activation of low-alumina slag to increase its potential usefulness in SSC. To improve the performance of low-alumina slag in SSC, the influence of lactic acid salts such as Na and K-lactate were examined and proved to be an effective activation technique for improving the compressive strength of SSC mixtures.
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