机制砂石粉对聚羧酸减水剂影响的研究进展

Research Progress on the Influence of Machine-made Sand and Stone Powder on Polycarboxylic Superplasticizer

随着城市建筑物数量的不断增加,混凝土的用量也逐渐增大,作为其原材料之一的天然砂,目前已经面临枯竭的趋势,机制砂的使用很好地解决了天然砂短缺的问题,机制砂替代天然砂已经成为混凝土行业发展的趋势之一。石粉作为机制砂生产过程中出现的产物,其岩石种类、含量、细度等都会对聚羧酸减水剂的使用效果产生一定的影响,从而影响混凝土拌合物的性质。本文论述了机制砂石粉种类及特点,探讨了硅质、钙质2种石粉的掺量和细度变化对聚羧酸减水剂使用效果的影响,并对机制砂混凝土今后的研究发展提出展望。

As the number of urban buildings continues to increase,the amount of concrete is gradually increasing.Natural sand,one of its raw materials,is currently facing a trend of exhaustion.The use of machine-made sand has solved the shortage of natural sand.Nowadays,replacing natural sand with machine-made sand has become one of the development trends of the concrete industry.As a product in the production process of machine-made sand,stone powder,its rock type,content,fineness,etc.will have a certain impact on the polycarboxylic superplasticizer,thereby affecting the properties of the concrete mixture.This paper discusses the types and characteristics of machine-made sand and gravel powder,discusses the influence of the mixing amount and fineness of the two kinds of siliceous and calcareous stone powder on the polycarboxylic superplasticizer,and puts forward the prospects for the future research and development of machine-made sand concrete.