随着经济与社会的发展 ,建设规模的不断扩大 ,作为国民经济建设中用量最大的材料 ,水泥混凝土的用量与日俱增。但是 ,商品混凝土的发展 ,并没有与之同步。除了北京、上海等各大城市外 ,中小城市的施工用混凝土的商品化进程依然不尽人意。这一方面说明商品混凝土的发展受到一些? With the development of economy and society, the scale of construction continues to expand. As the most used material in national economic construction, the amount of cement concrete is increasing day by day. However, the development of commodity concrete has not been synchronized with it. In addition to major cities such as Beijing and Shanghai, the commercialization of concrete for construction in small and medium-sized cities is still not satisfactory. On the one hand that the development of commercial concrete subject to some?