一般所指混凝土质量检验是属于事后检查,而混凝土的质量控制是生产过程中的检验。虽然二者都是运用数理统计学的概念,根据混凝土试块的抗压极限强度进行统计、分析、判断,但因二者的目的不同,所采用的方式方法也就完全不同。相同条件配制与搅拌的混凝土,经过大量试块强度检验,用数理统计方法分析研究结果,可以证明:对于同一母体所抽取大量混凝土试块的强度值频率曲线是接近正态分布的。因此我们可以根据正态频率曲线 Generally referred to as the quality inspection of concrete belongs to the post-examination inspection, and the quality control of concrete is the inspection during the production process. Although both of them are based on the concept of mathematical statistics, statistics, analysis, and judgment are based on the compressive ultimate strength of the concrete test block. However, because of the different purposes of the two, the methods and methods used are completely different. Concretes prepared and mixed under the same conditions were subjected to a large number of test blocks and the results were analyzed by mathematical statistics. It can be proved that the frequency curves of the strength values ​​of a large number of concrete blocks taken from the same parent body are close to normal distribution. So we can follow the normal frequency curve