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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