摘 要
随着城市化进程的加快和土地资源的日益紧张，超高层建筑逐渐成为现代城市建设的重要组成部分，而高性能混凝土因其优异的力学性能和耐久性成为超高层建筑的核心材料之一本研究以超高层建筑对混凝土材料的特殊需求为背景，旨在探讨高性能混凝土在复杂服役环境下的应用策略及其长期耐久性通过实验室模拟与工程实践相结合的方法，系统分析了不同配合比设计、外加剂种类及施工工艺对高性能混凝土性能的影响，并采用加速老化试验评估其在碳化、氯离子侵蚀和冻融循环等多重耦合因素作用下的耐久性研究表明，优化配合比设计可显著提升混凝土的抗裂性和密实度，同时掺入适量的矿物掺合料和高效减水剂能够有效延缓有害物质的渗透此外，研究还提出了一种基于全生命周期的耐久性预测模型，该模型结合现场监测数据和数值模拟结果，为超高层建筑的长期维护提供了科学依据本研究的创新点在于将材料微观结构调控与宏观性能优化相结合，并首次提出了适用于超高层建筑服役环境的高性能混凝土耐久性评价体系，为相关工程实践提供了理论支持和技术指导主要贡献在于明确了高性能混凝土在复杂环境中的劣化机制，为延长超高层建筑使用寿命奠定了基础
关键词：高性能混凝土；超高层建筑；耐久性评价体系；微观结构调控；长期服役环境
ABSTRACT
With the acceleration of urbanization and the increasing tension of land resources, super-high-rise buildings have gradually become an important part of modern urban construction. High-performance concrete (HPC), due to its excellent mechanical properties and durability, has become one of the core materials for super-high-rise buildings. This study, based on the special requirements of super-high-rise buildings for concrete materials, aims to explore the application strategies of HPC under complex service environments and its long-term durability. By combining laboratory simulations with engineering practices, the study systematically analyzed the effects of different mix designs, types of admixtures, and construction techniques on the performance of HPC. Accelerated aging tests were conducted to evaluate its durability under the coupled effects of carbonation, chloride ion ingress, and freeze-thaw cycles. The results indicate that optimized mix design can significantly enhance the crack resistance and compactness of concrete, while the incorporation of appropriate mineral admixtures and high-efficiency water reducers effectively slows down the penetration of harmful substances. Additionally, this study proposes a durability prediction model based on the entire life cycle, which integrates on-site monitoring data and numerical simulation results, providing a scientific basis for the long-term maintenance of super-high-rise buildings. The innovation of this research lies in the combination of microstructural regulation of materials and macroscopic performance optimization, and it is the first to propose a durability evaluation system for HPC suitable for the service environment of super-high-rise buildings, offering theoretical support and technical guidance for related engineering practices. The main contribution is the clarification of the degradation mechanisms of HPC under complex environments, laying the foundation for extending the service life of super-high-rise buildings.
Keywords: High Performance Concrete; Super High-rise Building; Durability Evaluation System; Microstructure Regulation; Long-term Service Environment
目 录
摘 要 I
ABSTRACT II
第1章 绪论 2
1.1 高性能混凝土应用背景与意义 2
1.2 国内外研究现状分析 2
1.3 本文研究方法与技术路线 3
第2章 高性能混凝土材料特性研究 4
2.1 高性能混凝土的定义与分类 4
2.2 力学性能与工作性分析 4
2.3 耐久性关键指标评估 5
第3章 高性能混凝土在超高层建筑中的应用技术 6
3.1 超高层建筑对混凝土性能的要求 6
3.2 施工工艺与质量控制要点 6
3.3 典型工程案例分析 7
第4章 高性能混凝土耐久性影响因素及优化策略 8
4.1 环境因素对耐久性的影响 8
4.2 材料配比优化与试验验证 8
4.3 提高耐久性的关键技术措施 9
结论 10
参考文献 11
致 谢 12
