![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
跨度为6m,混凝土强度为C30的现浇混凝土板,当混凝土强度至少应达到()方可拆除底模
A.15N/mm
B.21N/mm
C.22.5N/mm
D.30N/mm
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
C、22.5N/mm
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.15N/mm
B.21N/mm
C.22.5N/mm
D.30N/mm
C、22.5N/mm
跨度为8m、强度为C30的现浇混凝土梁,当混凝土强度至少应达到21N/mm2时方可拆除梁底模板。()
A.20mm
B.25mm
C.30mm
D.35mm
A.C25
B.C30
C.C35
D.C40
E.C45
A.15N/mm2
B.18N/mm2
C.22.5N/mm2
D.30N/mm2