我国目前正处于基础设施建设的高峰期,工程类型、新的结构型式较多,施工技术也随之有很大的发展,不仅对混凝土需求量一直居高不下,而且对混凝土拌和物和硬化后性能提出了许多新的要求,混凝土工程─从原材料、拌和物试配生产,直到成型工艺施工的全过程所遭遇的困难、问题和挑战也层出不穷,严重影响着工程质量。原材料质量不能适应优质混凝土生产的需要,却大量被消耗,以至于连传统上认为是取之不尽的砂石都变成短缺的 At present, China is at the peak of infrastructure construction. There are more types of projects and new types of structures, and the construction technology has also been greatly developed. Not only the demand for concrete has remained high, but also the concrete mixes and hardened Performance demands many new requirements. Concrete works, ranging from the trial production of raw materials and blends to the entire process of forming process, also encountered numerous problems and challenges, seriously affecting the quality of the project. The quality of raw materials, which can not be adapted to the needs of high-quality concrete production, is drained so much that even gravel, traditionally considered inexhaustible, becomes scarce