... concrete bridge 混凝土桥 concrete antifreezer 混凝土防冻剂 concrete grillage 混凝土格床 ...
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A new concept called "liquid water-cement ratio" and its formula are advanced, which can be used to evaluate liquid water amount in the concrete mixed with antifreezer at negative temperature.
在预拌混凝土的生产中混凝土的凝结时间是一项重要的技术指标 ，本文试图讨论用水量、水灰比、粉煤灰和外加剂等因素对混凝土凝结时间的影响。
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