C50高抛自密实微膨胀钢管混凝土的研究与应用  

Research and engineering application of C50 high fling-self compacting and slight expansion steel pipe concrete

作　　者：牟廷敏[1] 宋晓波[2] 范碧琨[1] 李治强 丁庆军[2] 

机构地区：[1]四川省交通厅公路规划勘察设计研究院,四川成都610041 [2]武汉理工大学材料学院,湖北武汉430070 [3]中铁二十三局集团有限公司,四川成都610072

出　　处：《混凝土》2012年第9期103-105,共3页Concrete

摘　　要：系统研究了胶凝材料组成和用量、砂率、膨胀剂以及含气量对混凝土工作性能、力学性能、体积变形性能的影响,制备出了C50自密实微膨胀钢管混凝土,在此基础上研究了增黏剂组分对C50自密实微膨胀钢管混凝土高位抛落后匀质性能的影响,设计制备出满足干海子特大桥钢管格构桥墩高抛施工要求的C50高抛自密实微膨胀钢管混凝土,工程应用表明,钢管内混凝土均匀密实,钢管与混凝土没有脱空,混凝土力性能满足设计要求。Systematically studied the composition and amount of cementitious material, the influence of the sand ratio, expansion agent and gas content to the concrete＇s performance, mechanical properties, volume expansion properties.Then C50 fling-self compacting and slight expansion steel pipe concrete were prepared.Based on what have done, we studied the impact of the tackifier component to C50 fling-self compacting and slight expansion steel pipe concrete＇s uniformity while it be high throwed, and designed the concrete to meet the requirements of Ganhaizite struc- tural steel bridge piers.The engineering applications indicated that concrete in steel pipe uniformed.Steel tube and concrete was not void and con- crete performance meet the design requirements.

关 键 词：自密实微膨胀钢管混凝土 高抛施工 增黏剂 匀质性 

分 类 号：TU528.059[建筑科学—建筑技术科学]