题目内容
(请给出正确答案)
[单选题]
当采用泵送混凝土时,要求混凝土的坍落度宜为()。mm。
A.40~60;
B.60~100;
C.100~160;
D.100~200
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A.40~60;
B.60~100;
C.100~160;
D.100~200
A.75mm
B.100mm
C.125
D.150mm
E.175mm
A.360kg/m3
B.330kg/m3
C.290kg/m3
D.300kg/m3
A.小于90 mm
B.小于100 mm
C.大于90 mm
D.大于100 mm
A.330,180±10
B.360,210±10
C.330,210±10
D.360,180±10
A.100,180
B.120,180
C.100,160
D.120,160