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【多选题】
采用预制柱及叠合梁的装配整体式框架中，关于柱底接缝处的说法正确的是（ ）。A.
后浇节点区混凝土上表面应设置粗糙面
B.
后浇节点区混凝土表面
C.
柱纵向受力钢筋应贯穿后浇节点区
D.
柱底接缝厚度宜为 20mm ，并应采用灌浆料填实
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