![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
已知水胶比为0.35,单位用水量为175kg,砂率为40%,假定每立方米混凝土质量为2400kg,试计算每方混凝土中砂子用量kg
A.438
B.690
C.779
D.1035
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
B、690
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.438
B.690
C.779
D.1035
B、690
A.170kg,242kg,2.90kg
B.170kg,242kg,4.54kg
C.170kg,378kg,2.90kg
D.170kg,378kg,4.54kg
A.保证水胶比不变,增加水泥浆量
B.增加单位用水量
C.减少砂率
D.增加外加剂掺量
A.定量法则
B.水胶比法则
C.恒定用水量法则
D.流动性法则
A.恒定用水量法则
B.工作性法则
C.坍落度法则
D.恒定流动性法则
A.0.35
B.0.40
C.0.55
D.0.60
A.154
B.127
C.181
D.137
A.154
B.127
C.181
D.137
A.285
B.330
C.300
D.360