预制梁施工单项选择题每日一练(2019.01.13)

A、距跨中4m范围≤4mm，其余≤6mm
B、距跨中5m范围≤5mm，其余≤10mm
C、距跨中4m范围≤10mm，其余≤20mm

A、压浆前管道真空度稳定在-0.06～-0.08mpa
B、压浆最大压力不宜超过0.60mpa
C、压浆应在0.5～0.6mpa下持压2min
D、压浆应在0.5～0.6mpa下持压3min

A、C50无收缩砼
B、C50微膨胀砼
C、C50普通砼

A、±15mm
B、+10mm～-5mm
C、±10mm

A.14
B.30
C.56