單項(xiàng)選擇題自密實(shí)混凝土水膠比宜小于()

A.0.40
B.0.42
C.0.45
D.0.50


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1.單項(xiàng)選擇題自密實(shí)混凝土粗骨料振動離析率≤()

A.5%
B.10%
C.15%
D.20%

2.單項(xiàng)選擇題石灰石粉28d活性指數(shù)≥()

A.60%
B.65%
C.70%
D.75%

3.單項(xiàng)選擇題礦渣粉的流動度比≥()

A.90%
B.95%
C.100%
D.105%

4.單項(xiàng)選擇題泵送混凝土的10s時的壓力泌水率不宜大于()

A.30%
B.35%
C.40%
D.45%