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混凝土工程的冬期施工技术管理!

来源: 石家庄市海森化工有限公司  日期:2020-12-12 16:35:16  属于:行业动态
文章摘要:

DANGSHIWAIRIPINGJUNQIWENLIANXU5dWENDINGDIYU5℃JIJINRUDONGQISHIGONG,DANGSHIWAIRIPINGJUNQIWENLIANXU5dGAOYU5℃JIJIECHUDONGQISHIGONG。HUNNINGTUGONGCHENGDONGQISHIGONGYINGZHUYIYIXIASHIXIANG:

(1)混凝土养护期间的温度测量应符合下列规定:

1)CAIYONGXUREFAHUOZONGHEXUREFASHI,ZAIDADAOSHOUDONGLINJIEQIANGDUZHIQIANYINGMEIGE4~6hCELIANGYICI;

2)CAIYONGFUWENYANGHUFASHI,ZAIDADAOSHOUDONGLINJIEQIANGDUZHIQIANYINGMEIGE2hCELIANGYICI;

3)CAIYONGJIAREFASHI,SHENGWENHEJIANGWENJIEDUANYINGMEIGE1hCELIANGYICI,HENGWENJIEDUANMEIGE2hCELIANGYICI;

4)HUNNINGTUZAIDADAOSHOUDONGLINJIEQIANGDUHOU,KETINGZHICEWEN。

(2)拆模时混凝土表面与环境温差大于20℃时,混凝土表面应及时覆盖,缓慢冷却。

(3)冬期施工混凝土强度试件的留置应增设与结构同条件养护试件,养护试件不应少于2组。同条件养护试件应在解冻后进行试验。

(4)冬施浇筑的混凝土,其临界强度应符合下列规定:

1)DANGSHIWAIZUIDIQIWENBUDIYU-15℃SHI,CAIYONGZONGHEXUREFA、FUWENYANGHUFASHIGONGDEHUNNINGTUSHOUDONGLINJIEQIANGDUBUYINGXIAOYU4.0MPa;DANGSHIWAIZUIDIQIWENBUDIYU-30℃SHI,CAIYONGFUWENYANGHUFASHIGONGDEHUNNINGTUSHOUDONGLINJIEQIANGDUBUYINGXIAOYU5.0MPa。

2)DUIQIANGDUDENGJIDENGYUHUOGAOYUC50DEHUNNINGTU,BUYIXIAOYUSHEJIHUNNINGTUQIANGDUDENGJIZHIDE30%。

3)DUIYOUKANGSHENYAOQIUDEHUNNINGTU,BUYIXIAOYUSHEJIHUNNINGTUQIANGDUDENGJIZHIDE50%。

4)DANGSHIGONGXUYAOTIGAOHUNNINGTUDEQIANGDUDENGJISHI,YINGANTIGAOHOUDEQIANGDUDENGJIQUEDINGSHOUDONGLINJIEQIANGDU。


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