混凝土浇筑、振捣施工注意事项.doc
文本预览下载声明
混凝土浇筑、振捣施工注意事项
混凝土浇筑、振捣施工注意事项提要:墙上口找平:混凝土浇筑振捣完毕,将上口甩出的钢筋加以整理,用木抹子按预定标高标线,将墙上表面混凝土找平
资料来自
混凝土浇筑、振捣施工注意事项
1)墙体浇筑混凝土前,在底部接搓处先均匀浇筑5cm厚与墙体混凝土成分相同的减石子砂浆。用铁锹均匀入模,不应用吊斗直接灌入模内。利用混凝土杆检查浇筑高度,一般控制在40cm左右;分层浇筑、振捣。混凝土下料点应分散布置。墙体连续进行浇筑,上下层混凝土之间时间间隔不得超过水泥的初凝时间,一般不超过2h。接槎处应振捣密实。
2)洞口浇筑时,使洞口两侧浇筑高度对称均匀,振捣棒距洞边30cm以上,宜从两侧同时振捣,防止洞口变形。大洞口下部模板应开口,并保证振捣密实。
3)振捣:插入式振捣器移动间距不大于振捣器作用部分长度的倍,一般应小于50cm。每一振点的延续时间,以表面呈现浮浆和不再沉落为达到要求,避免碰撞钢筋、模板、预埋件、预埋管等,发现有变形、移位,各有关工种相互配合进行处理。
4)墙上口找平:混凝土浇筑振捣完毕,将上口甩出的钢筋加以整理,用木抹子按预定标高标线,将墙上表面混凝土找平。
5)拆模养护:混凝土浇筑完毕后,应在12h以内加以覆盖和浇水,常温时混凝土强度大于。保证拆模时,墙体不粘模、不掉角、不裂缝,及时修整墙面、边角。常温时及时喷水养护,养护期一般不少于14d,浇水次数应能保持混凝土有足够的润湿状态。
6)浇筑板混凝土的虚铺厚度应略大于板厚,用平板振捣器垂直浇筑方向来回振捣,厚板可用插入式振捣器顺浇筑方向拖拉振捣,并用钢插尺检查混凝土厚度,振捣完毕后用长木抹子抹平,表面拉毛。
7)浇筑完毕后及时用塑料布覆盖混凝土,并浇水养护。
资料来自
Measures for the routine management of moral education in Middle SchoolsMethod of conventional management of moral education in middle schoolFirst, the guiding ideology:School moral education is an organic whole of the whole education work, always adhere to the school adhere to the moral education, education for this product, and actively promote the quality education, the school building efficient curriculum system of moral education, moral education, improve the sense of attraction and appeal, enhance the moral education work for through and timeliness. Teach everyone, service education and management education, and school moral education work must be with family education and community education closely together, to form a concerted pattern, and strive to create a good atmosphere for education, and to promote the all-round development of students, to establish a scientific moral education full of vigor the For long-term mechanism.Two, the goal of moral education:To guide the students to form the correct world outlook, outlook on life, values, to cultivate students unity and mutual assistance, honest and trustworthy, law-abiding, good quality, hard work, set a good XX students ideological quality, psycholog
显示全部