自密实混凝土在大跨越输电高塔应用中的试验研究  

Experimental Study of Application of Self-Compacting Concrete in High Transmission Towers with Large Span

作　　者：徐建国[1] 叶尹[1] 钱晓倩[2] 朱耀台[2] 钱匡亮[2] 

机构地区：[1]浙江省电力设计院,杭州市310014 [2]浙江大学建筑工程学院,杭州市310027

出　　处：《电力建设》2008年第7期20-24,共5页Electric Power Construction

摘　　要：采用自密实混凝土可以有效解决大跨越输电高塔中钢管内混凝土在施工中难以浇筑的问题。通过原材料、复合外加剂及高掺量粉煤灰的优选和微膨胀技术的应用,并对配合比进行优化设计,配制出符合工程设计要求的具有较好工作性能的自密实混凝土。对所配制混凝土的拌合物流动、力学和变形性能进行了试验测定,并对相应的自密实钢管混凝土试件的界面结合性能进行了试验分析。结果表明采用自密实混凝土可满足钢管内混凝土的浇筑质量,并能确保钢管与混凝土之间共同作用的可靠性。The problem that it is hard to pour concrete into the steel tube of high transmission tower with large span can be effectively solved by using self-compacting concrete. Self-compacting concrete that meets engineering design requirements and has good performance can be produced through following technologies： carefully selecting raw materials, compound additives, and high mixture of pulverized coal, applying micro -expansion technology, and optimizing mixing proportion. Measurements of the flow, mechanics and deformation performances of concrete mixture are performed and the bonding performance between interfaces of self-compacting concrete specimens are also analyzed experimentally. Results show that self- compacting concrete meets quality requirements of concrete-filled steel tube pouring and ensures reliable functioning between steel tube and concrete.

关 键 词：自密实混凝土 钢管混凝土 配合比优化 变形性能 界面结合性能 

分 类 号：TM753[电气工程—电力系统及自动化] TU528.59[建筑科学—建筑技术科学]