题目内容
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[单选题]
粉煤灰的需水量比方法原理:按GB/T2419测定试验胶砂和对比胶砂的流动度,以二者流动度达到()时的加水量之比确定粉煤灰的需水量比。
A.100mm~120mm
B.120mm~140mm
C.130mm~140mm
D.130mm~150mm
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A.100mm~120mm
B.120mm~140mm
C.130mm~140mm
D.130mm~150mm
A.JGJ253-2011
B.GB/T10294-2008
C.GB/T10295-2008
D.GB/T13475-2008
A.2min
B.10min
C.20min
D.30min
A.0.285
B.0.293
C.0.302
D.0.31