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无粘结预应力混凝土施工时,无须()。

单选题
2022-03-04 16:06
A、预留孔道和灌浆
B、预应力筋铺设就位
C、混凝土浇筑、养护
D、预应力筋的张拉、锚固
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正确答案
A

试题解析
无粘结预应力施工无粘结预应力是近年来发展起来的新技术.其做法是在预应力筋表面涂敷防腐润滑油脂,并外包塑料护套制成无粘结预应力筋后如同普通钢筋一样铺设在支好的模板内;然后.浇筑混凝土。待混凝土强度达到设计要求后再张拉锚固。它的特点是不需预留孔道和灌浆,施工简单等。考点:无粘结预应力施工;

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