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一、前言近年来,随着土木工程建设事业的发展,砼工程量日益增多,对砂、石原材料的需求量也不断增大。砼的配制除需满足一定的技术性能要求外,还必须满足经济上的要求,特别是要能充分利用地方材料,方便施工。但往往由于砂石产地、材质的变化,引起骨料中0.5～2cm 与2～4cm 两种粒级石子的比例失调,使2～4cm 骨料颗粒含量增多。如我公司砂石楼将7～15cm 的卵石用
I. INTRODUCTION In recent years, with the development of civil engineering construction projects, the number of concrete projects has been increasing, and the demand for raw materials for sand and stone is also increasing. In addition to meeting certain technical performance requirements, we must also meet the economic requirements, especially to make full use of local materials to facilitate construction. However, due to changes in the place of origin and material of sandstone, the proportions of the two types of aggregates of 0.5 to 2 cm and 2 to 4 cm in the aggregate are caused to be misaligned, and the content of 2 to 4 cm aggregate particles is increased. For example, sand stone floor of our company will use 7~15cm pebbles