楼板允许间断浇筑吗

楼板允许间断浇筑吗
2025-03-15 06:14:02
推荐回答(1个)
回答1:

。。。你指的间断浇筑是什么意思?先浇一部分再浇另一部分?如果是的话,请看以下,来自网络:
1)、若施工间歇时间未超过所采用水泥的初凝时间则可继续浇筑混凝土时,可将新混凝土均匀倾入,盖满先浇好的混凝土,然后用振捣工具穿过新混凝土达到已浇好的混凝土层内5一10cm,将新老混凝土一并捣实,结成整体。
2)、若施工间歇时间超过所采用水泥的初凝时间,则必须等待已浇筑的混凝土强度不小于1.18MPa时,方可继续施工。
3)、 若施工间隔时间较长,已浇筑的混凝土早已硬化,在新浇筑混凝土前应作如下处理:
①清除接缝表面的水泥浮浆、薄膜、松散砂石,软弱混凝土层、油污等;
②将钢筋上的锈斑及浮浆刷净;
③大量实验表明接续面进行粗糙处理可以明显提高接续面粘结强度;
④梁、柱施工缝应与梁、柱轴线垂直,板墙施工缝应与板面、墙面垂直,不宜做成斜坡形;
⑤留梁的竖向施工缝时,应先做一块隔板,放在施工缝的位置上,再浇筑混凝士。隔板应按梁中钢筋位置留出缺口,满插到梁底;若隔板上下不留缺口,板就被钢筋挡住,插不到梁底,混凝土的水泥砂浆就容易从下部流出,使梁底形 成一个强度较低的水泥砂浆层;
⑥做板的竖向的施工缝时,为了避免混凝土收缩裂缝,可采用新加设接头钢筋的办法。接头钢筋一般可采用6-10,其所需截面面 积一般为板截面面积的0.2-0.3%,长度为插入新旧混凝土各30倍直径,两端加弯钩。这种钢筋一般放在板的上面,必要时上下均放。

望采纳,谢谢。

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