石灰石粉与矿物掺合料复掺对混凝土工作性及强度的影响

Effect of Limestone Powder and Mineral Additive on the Workability and Compressive Strength of Concrete

研究了石灰石超细粉与低品质粉煤灰复掺对混凝土性能的影响,通过对不同比例石灰石超细粉掺加量下新拌混凝土工作性能的试验研究以及混凝土强度发展规律的分析,结果表明,在同坍落度下提高石灰石超细粉的添加量可明显减小混凝土用水量,降低水胶比;在胶凝材料用量相同时,石灰石超细粉替代量提高到一定程度时混凝土强度增长率减小.

In this paper,through the experiment of various proportions of limestone powder,the effect of different proportions limestone powder and low-quality fly ash to the concrete workability is studied.The results show that the concrete water consumption has been reduced obviously.By using the same amount of gelatinous materials,the growth rate of compressive strength of concrete are reduced when the limestone powder replacement level is increased to a certain extent.