论文部分内容阅读
对于各型侵蚀性均宜采用密实坚硬的砾石、卵石及碎石集料。粗骨料的技术要求(用于不透水性混凝土) (二)选择细磨水泥与保证必要的水泥用量水泥的磨细度对混凝土的透水性有很大影响,特别是水灰比较大时。因粗磨水泥在混凝土捣实以后,比细磨水泥憎水性大,这部分水上升积集于集料颗粒之间形成孔隙,这些孔隙能使压力水透入混凝土体内。但细磨水泥收缩率较大,放热量较高,虽然如此,细磨水泥对混凝土的密实度是有利的。
For all types of aggressiveness, dense and hard gravel, pebbles and crushed stone aggregates should be used. Technical requirements for coarse aggregates (for impervious concrete) (b) Selection of finely milled cement and ensuring the necessary amount of cement The fineness of cement has a great influence on the water permeability of concrete, especially when the water ash is relatively large. Because the kibble cement is more compact than the finely ground cement after the concrete is tamped, this part of the water rises and accumulates between the aggregate particles to form pores. These pores allow the pressure water to penetrate into the concrete body. However, the fine-refining cement has a large shrinkage rate and a high heat release. However, the fine-grinding cement is advantageous for the compactness of the concrete.