Application Practice of High-Performance Concrete in Supertall Structures
高性能混凝土在超高层结构中的应用实践

摘要

随着城市化发展与土地资源日趋紧张，超高层建筑已成为现代城市建设的重要趋势。高性能混凝土具有强度高、耐久性好、工作性能优良等特点，在超高层建筑工程中得到广泛应用。本文通过对国内外典型超高层建筑案例的分析与总结，探讨了高性能混凝土的应用技术与工程经验。研究表明，高性能混凝土主要用于核心筒、巨柱、转换层等关键受力部位，强度等级可达 C60～C100，能够有效减小构件截面尺寸，提升建筑有效使用面积。通过配合比优化、掺入高效减水剂与矿物掺合料，可显著改善其工作性与耐久性，且泵送高度可达 600 米以上，满足超高层施工需求。虽然其材料价格高于普通混凝土 15%～25%，但凭借减小截面、加快进度、延长使用寿命等优势，整体经济效益突出。本文研究成果可为高性能混凝土在超高层建筑中的工程应用提供参考与指导。

Abstract

With the development of urbanization and the increasing scarcity of land resources, supertall buildings have become an important trend in modern urban construction. High-performance concrete, characterized by high strength, excellent durability, and good workability, has been widely applied in supertall building projects. Through the analysis and summary of typical supertall building cases both in China and abroad, this paper explores the application technologies and engineering experience of high-performance concrete. The study shows that high-performance concrete is mainly used in key load-bearing parts such as core tubes, mega-columns, and transfer stories, with strength grades ranging from C60 to C100, which can effectively reduce the cross-sectional dimensions of structural members and increase the usable floor area of buildings. Through mix proportion optimization and the incorporation of high-range water reducers and mineral admixtures, its workability and durability can be significantly improved, while the pumping height can exceed 600 meters, meeting the construction requirements of supertall buildings. Although its material cost is 15% to 25% higher than that of ordinary concrete, its overall economic benefits are considerable due to the reduction of member dimensions, acceleration of construction progress, and extension of service life. The findings of this study can provide reference and guidance for the engineering application of high-performance concrete in supertall buildings.