随着我国沿海十四个城市对外开放及经济特区的实施,城市建设和工厂技术改造对混凝土的需求量急剧增加。特别是内联、外联、中外合资项目不断增加,建设项目大多是高层框架结构,工期要求短,现浇混凝土量大,质量要求高,因而混凝土的供需矛盾日益突出,为商品混凝土的发展开辟了良好的途径。 With the opening of the 14 cities along the coast of China and the implementation of special economic zones, the demand for concrete in urban construction and factory technological transformation has increased dramatically. In particular, the inline, outreach, and Sino-foreign joint ventures have continuously increased. Most of the construction projects are high-rise frame structures, requiring short construction time, large quantities of cast-in-place concrete, and high quality requirements. As a result, the contradiction between supply and demand of concrete has become increasingly prominent, opening up for the development of commercial concrete. A good way.