当混凝土的设计强度等级小于C60时,混凝土的配制强度为( )
A: fcu,o≥fcu,k-1.645σ
B: fcu,o≥fcu,k+1.645σ
C: fcu,o≥fcu,k+0.645σ
D: fcu,o≥fcu,k-0.645σ
A: fcu,o≥fcu,k-1.645σ
B: fcu,o≥fcu,k+1.645σ
C: fcu,o≥fcu,k+0.645σ
D: fcu,o≥fcu,k-0.645σ
举一反三
- 混凝土强度等级是依据 强度值划分的。 A: fcu B: fcp C: fcu,k D: fcu,0
- 混凝土的强度值的大小关系正确的是() A: fc,k>;fcu,k>;fc B: fcu,k>;fc,k>;fc C: fc>;fc,k>;fcu,k D: fc>;fcu,k>;fc,k
- 下列混凝土强度指标,排列正确的是( ) A: fcu,k > ft > fc> ftk B: fcu,k > fc> ft >ftk C: fc> fcu,k >ftk>ft D: fcu,k > fc> ftk > ft
- 按照非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,fcu,min≥0.85fcu,k B: mfcu≥1.05fcu,k,fcu,min≥0.85fcu,k C: mfcu≥fcu,k,fcu,min≥0.95fcu,k D: mfcu≥1.15fcu,k,fcu,min≥0.95fcu,k
- 按照非统计方法评定砼强度时,其强度应同时满足下列要求:() A: Amfcu≥fcu,k,fcu,min≥0.85fcu,k B: Bmfcu≥1.05fcu,k,fcu,min≥0.85fcu,k C: Cmfcu≥fcu,k,fcu,min≥0.95fcu,k D: Dmfcu≥1.15fcu,k,fcu,min≥0.95fcu,k