我国商品混凝土首先是在几个大城市推广应用。实践表明,应用商品混凝土有其明显的社会效益和环境效益,宏观经济效益也是比较好的。近几年来,很多城市也都迫切地要求推广应用商品混凝土,而面临的第一个问题就是如何解决建立搅拌站所需的巨额投资。从我国现有的商品混凝土搅拌站水平看,一个年产10万m~3左 The commercial concrete in China is first popularized and applied in several large cities. Practice has shown that the application of commercial concrete has obvious social and environmental benefits, and the macroeconomic benefits are also relatively good. In recent years, many cities have also urgently demanded the promotion and application of commercial concrete, and the first problem faced is how to solve the huge investment needed to establish a mixing plant. From the level of existing commercial concrete mixing plants in China, an annual output of 100,000 m 3 left