单选题按照标准差已知统计方法评定砼强度时,其强度应同时满足下列要求()A mfcu≥fcu,k+0.7σfcu,min≥fcu,k-0.7σ;B mfcu≥fcu,k+0.8σfcu,min≥fcu,kk-0.8σ;C mfcu≥fcu,k+0.85σfcu,min≥fcu,k-0.85σ;D mfcu≥fcu,k+0.95σfcu,min≥fcu,k-0.95σ。

题目
单选题
按照标准差已知统计方法评定砼强度时,其强度应同时满足下列要求()
A

mfcu≥fcu,k+0.7σfcu,min≥fcu,k-0.7σ;

B

mfcu≥fcu,k+0.8σfcu,min≥fcu,kk-0.8σ;

C

mfcu≥fcu,k+0.85σfcu,min≥fcu,k-0.85σ;

D

mfcu≥fcu,k+0.95σfcu,min≥fcu,k-0.95σ。


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