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高强混凝土应用超塑化剂往往使20～30%的水泥不能水化。试图在不消弱强度情况下,将这部分不能水化的水泥,用价格低廉的细矿粉代替。细矿粉包括有粉煤灰,地下电厂的粗粉煤灰,急冷高炉渣和标准砂,代替比例大致为体积的15—30%,验验结果表明细矿粉对高强混凝土现浇起到很好的作用,比一般混凝土用水量有较大的降低.在高强混凝土中用任何细矿粉以15%代替水泥,对于混凝土7天和2年的强度略有降低,同样普通水泥含量的混凝土强度接近予15～20%,细集料用细矿粉代替并
The use of superplasticizers for high-strength concrete often makes 20 to 30% of the cement not hydrated. Trying to replace this part of the non-hydratable cement with inexpensive fine ore without weakening the strength. Fine ore powder includes fly ash, coarse fly ash from underground power plants, quenched blast furnace slag and standard sand, and the substitution ratio is roughly 15-30% of the volume. The inspection results show that the fine ore powder is very useful for cast-in-place of high-strength concrete. Good effect, a greater reduction in water consumption than the average concrete. In high-strength concrete with any fine ore to replace cement with 15%, for the strength of concrete 7 days and 2 years slightly lower, the same concrete content of concrete strength Close to 15 to 20%, fine aggregate is replaced with fine ore and