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现在桥梁上广泛采用的混凝土,坍落度大约为8~10cm,强度为200~400kg/cm~2。这些混凝土通常作为预拌混凝土从预拌厂运到工程
Now widely used on the bridge concrete, slump is about 8 ~ 10cm, the intensity of 200 ~ 400kg / cm ~ 2. These concrete are often shipped as ready-mixed concrete from ready-mix plants to work