Abstract
Alkali-slag cements are of higher strength, and their other properties are also better than those of Portland cement. In this paper, the authors studied how the properties of alkali-phosphorus slag cement were influenced by the modulus of water glass (Na 2O:nSiO 2), soluble phosphates, water to solid ratio and the fineness of the slag when water glass and granulated phosphorus slag (GPS) were used to make alkali-GPS cement. The experimental results indicated that the modulus of water glass had great influence, but soluble phosphates had little influence on the properties of the cement. If the water to solid ratio was increased, it was not helpful both to the early hydration or to the strength of the cement. There would be a critical fineness after some days. If the fineness was larger than the critical value, the fineness hardly affected the strength of the cement.
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