外加剂对磷酸钙-水系统流动性能的影响

以无水碳酸钠、腐殖酸钠、鞣型减水剂(AST)作为磷酸钙-水系统外加剂，评价外加剂种类及用量对磷酸钙-水系统流动性能的影响。结果表明，随着外加剂用量的增加，磷酸钙-水系统的相对黏度均呈现先下降后升高的趋势，当外加剂用量为1%~1.5%时，均会明显降低磷酸钙-水系统相对黏度，进而提高磷酸钙-水系统的流动性。其中外加剂AST对提高磷酸钙-水系统的流动性较为显著，当AST用量为1.5%时，可使磷酸钙-水系统的相对黏度达到1.03 s/s，磷酸钙-水系统的流动性最佳。

The Inlfuence of Additive on the Fluidity of Calcium Phosphate-water System

With anhydrous sodium carbonate, sodium humate, tanned type water reducer (AST) as additive calcium phosphate-water system, evaluation of kind and amount of admixture affect the performance of calcium phosphate - water system lfow. Results show that with the increase of dosage of admixture, relative viscosity of the calcium phosphate-water system all showed a trend of decline after rising ifrst, when the dosage of admixture is 1% ~ 1.5%, can signiifcantly reduce calcium phosphate-water system relative viscosity, thus improve the liquidity of calcium phosphate-water system. The admixture AST can considerably improve the liquidity of calcium phosphate-water system, when AST amount is 1.5%, the relative viscosity of calcium phosphate-water system is 1.03 s/s, the liquidity of calcium phosphate-water system is the best.