【摘要】 国家速滑馆因其特殊的建筑使用和受力要求,涉及多种特种混凝土的制备和施工。针对冰下结构的抗冻、抗裂要求,采用复合型CF50P8F250钢纤维抗冻混凝土;针对超长超大不设分隔缝的结构设计,大面积使用补偿收缩混凝土;针对大截面、倾斜、复杂钢骨节点难以浇筑的问题,采用了C50高强自密实混凝土。分别介绍上述特种混凝土的施工技术。更多还原

【Abstract】 National Speed Skating Oval( NSSO) involved special service and load requirements,which further required many types of special concrete. The CF50 P8 F250 steel fiber-reinforced frost-resistant concrete is utilized under the ice surface to meet the requirements regarding frost-resistance and crackresistance,and it is also the first-time use of this type of concrete in city of Beijing. In addition,NSSO involved many large-sized structures,while no separation joints are allowed. In this regard,a great amount of expansive concrete is used. In order to solve the pouring issues of the inclined rigid structures having large sections,the C50 self-compacting concrete is adopted. The construction techniques are introduced regarding many types of special concrete.更多还原