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.
出处
《电力建设》
2008年第7期20-24,共5页
Electric Power Construction
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
self-compacting concrete
concrete-filled steel tube （CFST）
mixing proportion optimization
deformation performance
interface bonding performance
