C60钢纤维自密实混凝土超高层泵送施工技术  

Super High-rise Pumping Technology of C60 Self-compacting Concrete with Steel Fiber

作　　者：刘小刚[1] 余成行 彭明祥[1] 

机构地区：[1]中国建筑股份有限公司央视项目经理部,北京100020 [2]北京市中超混凝土有限责任公司,北京100024

出　　处：《施工技术》2008年第8期85-87,共3页Construction Technology

摘　　要：钢纤维混凝土具有较高的抗拉强度和断裂韧性、抗疲劳等优良性能。CCTV新址工程由于结构特殊,外筒型钢组合柱设计采用C60掺钢纤维自密实混凝土。通过理论计算,确保混凝土泵送能力满足最不利情况下的需要,同时结合实际情况,对钢纤维和模板选用、混凝土工作性能调整及施工要点综合考虑,用高流动性保证混凝土密实度和外观效果。Steel fiber concrete has advantages of high tensile strength and fracture toughness, as well as antifatigue property. C60 self-compacting concrete with steel fiber is used in section-steel columns of external tube in new site of CCTV project. By theoretical calculation, pumping capability of self-compacting concrete under the worst conditions can be satisfied. Then, based on actual projects, some factors are considered comprehensively to ensure concretes compaction and appearance effect, such as selection of steel fiber and formwork, working property adjusting, as well as construction points.

关 键 词：混凝土工程 自密实混凝土 钢纤维 泵送 施工技术 

分 类 号：TU528.53[建筑科学—建筑技术科学]