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高炉矿渣是炼铁过程中所产生的废渣。我国矿渣的年产量很大.尽管高炉矿渣被广泛地用作水泥工业的原料,但仍有大量的矿渣可以广为利用。矿渣砼是指以矿渣碎石为粗集料,普通砂为细集料的砼。一、矿渣砼的工艺特点由于矿渣砼的吸水率较常用集料砼大,孔隙多,表面粗糙,内摩擦阻力大,所以在配制矿渣砼时,应适当提高砂率和水灰比。 1.适当提高砂率,以减少矿渣碎石颗粒间的内摩擦阻力,使砼的和易性得到改善,以利于施工。 2.由于矿渣吸水率较常用集料大,必然要从砼拌和物中吸取较多的水分,所以适当增大水灰比(即增
Blast furnace slag is the residue produced during the ironmaking process. The annual production of slag in China is very large. Although blast furnace slag is widely used as raw material for the cement industry, there is still a large amount of slag that can be widely used. Slag slag refers to slag gravel as coarse aggregate and ordinary sand as fine aggregate. First, the slag crucible process characteristics Because the slag 砼 吸水 吸水 吸水 吸水 吸水 吸水 常用 than the commonly used aggregates , large, many pores, rough surface, internal frictional resistance, so in the preparation of slag 砼, should be appropriate to improve the sand rate and water-cement ratio. 1. Appropriately increase the sand rate to reduce the internal frictional resistance between the slag gravel particles, so that the workability of the crucible is improved to facilitate the construction. 2. Because the slag water absorption rate is larger than the commonly used aggregate, it is necessary to absorb more water from the smash mix, so the water-cement ratio should be increased (ie, increase