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1前言我国的民用建筑和工业建筑，大多采用砖混结构和钢筋砼结构，其质量的好坏，将决定着单位工程主体结构质量的优劣；而主体结构的质量，除与组成钢筋砼构件和结构中的钢材质量有关外，还与起主导作用的砼质量有关。因而，提高砼工程的质量是保证单位工程质量的重要方面，它
1 Introduction China’s civil and industrial buildings mostly use brick-concrete structures and reinforced concrete structures. The quality of these structures will determine the quality of the main structural unit of the unit; and the quality of the main structure, in addition to the composition of the reinforced concrete elements. In addition to the quality of the steel in the structure, it is also related to the quality of the crucible that plays a leading role. Therefore, improving the quality of concrete projects is an important aspect of ensuring the quality of unit projects.