论文部分内容阅读
论文针对石灰石超细粉与低品质粉煤灰复掺对混凝土性能的影响进行了研究。通过对不同比例石灰石超细粉掺量下新拌混凝土性质、强度发展规律的试验与分析,考察石灰石超细粉在混凝土中的作用与效果。试验结果表明掺石灰石超细粉可以减小坍落度损失。在同坍落度下,可明显减小混凝土用水量,降低水胶比。在水泥与胶凝材料用量相同时,石粉掺量的增加会使混凝土长期强度增长率略有减小。
In this paper, the effects of ultrafine limestone powder and low quality fly ash on concrete performance are studied. Through the test and analysis of the law of the development of the properties and strength of fresh concrete under the different proportion of ultra-fine powder of limestone, the function and effect of ultrafine limestone in concrete were investigated. The experimental results show that the addition of limestone ultrafine powder can reduce the slump loss. In the same slump, can significantly reduce the amount of water used in concrete, reducing water-cement ratio. With the same amount of cement and cementitious materials, the increase of the content of stone powder will make the concrete long-term strength growth rate slightly decrease.