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混凝土是主要建筑材料和主要结构材料,它的质量直接影响建筑物的使用性能和耐久性能,因此一直为人们所关心。以往控制混凝土质量都是事后检验,凭28天强度来评价合格与否。这种方法虽然可以发现质量问题,但不能防止质量问题。因此人们迫切感到事后检验的不足之处,从而产生了由砂石等原材料开始,一直到混凝土制品、结构构件、建筑物的质量管理,甚至包括计划协
Concrete is the main building material and the main structural material, and its quality directly affects the use performance and durability of the building, so it has always been of concern to people. In the past, the control of concrete quality was based on post-mortem inspections, and 28-day strength was used to evaluate whether it was qualified or not. Although this method can find quality problems, it cannot prevent quality problems. Therefore, people are eager to feel the inadequacies of subsequent inspections. This has led to the development of raw materials such as sand and gravel, as well as the quality management of concrete products, structural components, and buildings, and even plans.