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目前在评定混凝土质量时,缺乏一个完善的方法。在国内外的有关规范和质量评定标准中,对混凝土的质量控制都以控制施工控制下限为着眼点,对施工控制上限的控制却少有涉及,因此给混凝土施工质量的控制带来了一些不利影响。下面以我处近几年施工的三项工程的取样资料所作的质量控制图进行分析,并将有关统计特征值计算结果绘于图中。
There is a lack of a sound method to assess the quality of concrete. In the relevant standards and quality assessment standards at home and abroad, the lower limit of control of construction control is the focus of quality control of concrete, and the control of the upper limit of construction control is rarely involved, thus causing some disadvantages to the control of concrete construction quality. influences. The quality control chart made by the sampling data of the three projects constructed by our department in recent years is analyzed, and the calculation results of relevant statistical characteristic values are plotted in the figure.