抑制骨料碱活性效能试验对比研究

Comparative Study of Suppressions Effect on the Alkali Activity of Aggregates

针对黄登水电站拟选用活性灰岩骨料，采用粉煤灰、火山灰两种掺合料，掺量为25％～60％，采用两种抑制试验方法，来评定掺合料及对应掺量的抑制效果。两种试验方法结论基本一致，即粉煤灰抑制效果较好与火山灰。其中两种方法试验各有优缺点，骨料类型、级配和评定龄期等均与工程实际应用仍存在较大差异。

With regard to the active limestone aggregates selected by Huangdeng Hydropower Station, two kinds of admixtures, i.e. pulverized fuel ash and volcanic ash, with an admixture proportion of 25%-60%. Two kinds of suppression test methods are taken, to evaluate the suppression effect on admixtures and corresponding admixture proportion. The conclusions of these two test methods are basically identical, which is to say that the suppression effect of pulverized fuel ash is better than that of the volcanic ash. These two testing methods have their own advantages and disadvantages. The type, graduation and evaluation age of the aggregates, etc. still have a greater discrepancy from the oractical aoolication in the engineering.