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【单选题】
砖壁抹灰施工要点正确的是()。A.
内壁抹灰前2
B.
墙面扫净，用水洗刷干净，并用铁皮将所有灰缝刮一下，要求凹进l~l.5cm。
C.
应采用325号普通水泥配制水泥砂浆，配合比1：2.5必须称量准确，可掺适量防水粉，拌和要均匀。
D.
在抹第一层底层砂浆时，应用铁板用力将砂浆挤入砖缝内，增加砂浆与砖壁的粘结力。底层灰不宜太厚，一般在5~15mm。第二层将墙面找平，厚度7~12mm。第三层面层进行压光，厚度2~3mm。
E.
外壁抹灰可采用1：3.5水泥砂浆一般操作法。
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