大掺量粉煤灰免振捣混凝土的均匀试验研究

研究了胶凝材料用量、粉煤灰掺量、水胶比、外加剂和砂率等因素对大掺量粉煤灰免振捣混凝土性能的影响.利用SPSS软件中的逐步回归分析法建立了以混凝土拌合物流速、混凝土强度等为目标函数的回归方程，用Matlab软件中的优化技术求出了大掺量粉煤灰免振捣混凝土的优化配比组合.即水泥用量∶粉煤灰掺量∶高效减水剂掺量=1∶0.74∶0.035 6，水胶比40%，砂率45.4%指导试验，成功地配制出C40高抗渗免振捣混凝土.最后从机理上分析了粉煤灰对免振捣混凝土性能的影响.

The uniform design experimental research of a large amount of fly ash self compaction concrete

 Studied the effect of quantity of cementing material and fly ash，W/B(water binder) ratio，admixture，sand percentage， and so on to performance of super fly ash self compaction concrete Utilized the step by step regression analysis method in SPSS software to found regression equation， which uses the flow rate of concrete mixture and strength of concrete as objective function， and obtained the optimum mix proportion of super fly ash self compaction by the optimization technology in the Matlab software The result of this experiment shows the C40 high permeability resistance self compaction concrete can be made up successfully with the optimum mix proportion which is cement∶fly ash∶high range water reducer is 1∶0.74∶0.035 6，40% W/B ratio and 45.4% sand percentage In the last，analyzed the effect of fly ash to self compaction concrete from the aspect of principle.