发布时间:2025-02-01 01:35:25
一般浇完砼在三天后张能砌砖,如工程急第二天就能干,因为混凝土四小时就开始初凝,但要注意不要有大的振动。
一建市政大跨径空腹式拱桥宜在腹拱横墙完成未砌腹拱圈后卸落拱架
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