【摘要】 基于响应面法对硫铝酸盐水泥-普硅水泥-粉煤灰-硅灰四元体系进行试验设计,分别以凝结时间、3 d抗压强度及28 d抗压强度为响应值,探究硅酸盐水泥、粉煤灰和硅灰部分替代硫铝酸盐水泥时体系凝结时间、3、28 d抗压强度的变化规律。建立四元体系凝结时间和抗压强度预测模型,并对模型进行了回归分析和方差分析。结果表明,在保证3 d抗压强度优良的同时,28 d抗压强度最佳的各因素最佳水平为:普通硅酸盐水泥5%,粉煤灰5%,硅灰6%。响应曲面分析法可以对硫铝酸盐水泥基胶凝材料配合比进行优化。更多还原

【Abstract】 Based on the response surface methodology,the quaternary system of sulphoaluminate cement-ordinary portland cement-fly ash-silica fume was designed.The setting time,3 d compressive strength and 28 d compressive strength were used as the response values to investigate the changes of system setting time,3 d and 28 d compressive strength when Portland cement,fly ash and silica fume were partially substituted for sulphoaluminate cement.The prediction model of setting time and compressive strength of quaternary system was established,and the model was analyzed by regression analysis and variance analysis.The results show that the optimum level of 28 d compressive strength is 5% of Portland cement,5% of fly ash and 6% of silica fume while ensuring the excellent 3 d compressive strength.Response surface method can be used to optimize the proportion of sulphoaluminate cement-based cementitious materials.更多还原