论文部分内容阅读
近年来,华北、东北和内蒙等地区许多施工单位及建设单位先后使用了T—40钢筋混凝土低温附加剂(以下简称T—40)。为了进一步掌握T—40的使用范围和使用效果以及存在的问题和经验、教训,提出改进方向,我们于1982年6月及1983年6月两次对天津,通辽、阜新、哈尔滨、伊春、齐齐哈尔、扎兰屯、大雁、海拉尔、伊敏等地区的13个施工单位的44项工程作了实地调查,现将调查情况介绍如下: 一、使用情况在民用建筑方面,T—40都用在使用热养护法比较困难或不经济的地方,如多层建筑的基础承台梁、圈梁、现制楼梯、阳台、雨罩、挑檐等处。在工业建筑方面,T—40使用在炼油厂气体分馏框架结构,水池底板抗掺混凝土,5万千瓦发电站主厂房30余米高框架,100米高钢筋混凝土烟囱,
In recent years, many construction units and construction units in North China, Northeast China and Inner Mongolia have used T-40 concrete low-temperature additives (hereinafter abbreviated as T-40). In order to further grasp the scope of use of T-40 and its use effects, as well as existing problems, experiences and lessons, and propose directions for improvement, we applied to Tianjin, Tongliao, Fuxin, Harbin, and Yichun twice in June 1982 and June 1983. A total of 44 projects of 13 construction units in Qiqihar, Zalantun, Dayan, Hailar, Yimin and other areas were investigated on site. The investigation is now described as follows: I. Usage In civil construction, T-40 is used in The use of thermal conservation methods is difficult or uneconomical places such as foundation slab beams, ring beams, existing staircases, balconies, rain covers, and provocations in multi-story buildings. In industrial construction, the T-40 is used in the refinery gas fractionation frame structure, the tank bottom anti-admixed concrete, the 30-kilowatt power station main plant more than 30 meters high frame, 100 meters high reinforced concrete chimney,