商品混凝土方兴未艾第二次世界大战以后,随着各国建筑业的复苏,商品混凝土应运而生并得到迅速发展。据有关资料记载:目前,世界各国的商品混凝土产量已占混凝土总产量的70%以上。其中美国起步早,发展快,日本后来居上。日本建筑界把商品混凝土和泵送混凝土工艺的出现称之 Commodity concrete is in the ascendant After the World War II, with the recovery of the construction industry in various countries, commercial concrete emerged and developed rapidly. According to related data, at present, the output of commercial concrete in the world has accounted for more than 70% of the total output of concrete. Among them, the United States started early and developed rapidly. Japan later came to the top. Japanese construction industry calls the emergence of commercial concrete and pumped concrete technology