为防止导管堵塞,钻孔灌注桩水下混凝土的坍落度合适的值是()cm。A:10B:15C:20D:25

作者: rantiku 人气: - 评论: 0
问题 为防止导管堵塞,钻孔灌注桩水下混凝土的坍落度合适的值是()cm。
选项 A:10 B:15 C:20 D:25
答案 C
解析 钻孔灌注桩水下混凝土要求和易性好,坍落度要控制在18~22cm。

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