商品混凝土的推广应用业已成为混凝土施工技术发展的必然趋势，在我国的许多大中城市都已经建成了一些商品混凝土搅拌站之类的专业生产企业。混凝土搅拌运输车（下称运输车）成为必不可少的专用设备。２００１年７月１日起实施的建设部《建筑业企业资质规定》在预拌商品混凝土 The promotion and application of commodity concrete has become an inevitable trend in the development of concrete construction technology. In many of China’s large and medium-sized cities, some specialized production enterprises, such as commercial concrete mixing plants, have already been built. Concrete mixer trucks (hereinafter referred to as transport vehicles) become essential special equipment. The “Provisions on the Qualification of Construction Enterprises” of the Ministry of Construction is implemented on July 1, 2001