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我们知道,细砂往往会给混凝土拌合物和硬化的混凝土带来不良的影响。特别是在用传统的方法预制和浇灌混凝土时,1立方米混凝土的水泥用量,在某些情况下可高达40~60%。由于用水量很大,所以细砂混凝土拌合物常常会产生大量泌水,这就会使混凝土的强度和耐久性降低。在这种情况下,为了改善混凝土的质量,可采用以下几种工艺措施:①正确选择粗、细集料的比例(减少砂子份量);②使用凝结剂;③对混凝
We know that fine sand tends to adversely affect concrete mixes and hardened concrete. Especially when prefabricating and pouring concrete with conventional methods, the cement content of 1 cubic meter of concrete can reach as high as 40-60% in some cases. Due to the large amount of water used, the fine sand concrete mixture often generates a large amount of bleeding water, which will reduce the strength and durability of the concrete. In this case, in order to improve the quality of concrete, the following kinds of technical measures can be used: 1 The correct choice of coarse and fine aggregate ratio (reducing the amount of sand); 2 the use of coagulant; 3 pairs of coagulation