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58问答库 > 混凝土强度检验评定表怎么算标准差？K和fcu分别是什么？

混凝土强度检验评定表怎么算标准差？K和fcu分别是什么？

2025-04-01 18:42:15

推荐回答（1个）

回答（1）：

举例C30的混凝土，强度分别为32,32,33,33,34,34,35,35,36,36.标准差是1.49.
平均值是34，
把1.49和34带入公式就可以了，因为1.49小于2.5，所以带入公式的时候要选定2.5。
因为标准差小于2.5的话取值2.5MPa。
10组λ1取值1.15，λ2取值0.9
这样你还不会算吗？

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