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2 应用举例为了便于读者理解和掌握上述各种评定标准,下面通过实例分析来说明各种评定方法在工程实践中的应用。[例1]某预制混凝土构件厂生产的构件,其混凝土强度等级为 C30,前一统计期17批51组试件强度的批极差列于表2.1。试按表2.1中给出的批极差参数,按标准差已知统计方法对目前各批混凝土强度(数据列于表2.1)进行合格评定。
2 Application examples In order to facilitate the reader to understand and master the above-mentioned various assessment criteria, the following examples are used to illustrate the application of various assessment methods in engineering practice. [Example 1] The concrete strength grades of the components produced by a prefabricated concrete component plant were C30. The lot extremes of the 17 batches of 51 specimens in the previous statistical period were listed in Table 2.1. Based on the batch-to-batch parameters given in Table 2.1, the current batch of concrete strengths (data listed in Table 2.1) shall be evaluated for conformity according to known standard deviation statistical methods.