| 摘要: |
| 轻集料是一种来源广泛、轻质环保的材料，用于超高性能混凝土可以起到降低自重、减少自收缩等作用，近年来成为国内外的研究热点.然而，超高性能混凝土的设计是基于最大堆积密度理论的，而轻集料强度低且多孔的特性为其性能带来不利因素.为此，对比讨论了不同类型轻集料及其制备技术对超高性能混凝土宏观性能的影响，分析了轻集料在超高性能混凝土中的作用机理和增强机制，并结合现有的研究进展，展望了未来的发展前景. |
| 关键词: 轻集料 超高性能混凝土 制备技术 作用机理 |
| DOI：10.3969/j.issn.1007-9629.2023.08.009 |
| 分类号:TU528.31 |
| 基金项目:国家自然科学基金项目（U21A20149，51878003）；安徽省高校优秀科研创新团队项目（2022AH010017）；安徽建筑大学科研储备库培育项目（2022XMK01） |
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| Lightweight Aggregate in Ultra-high Performance Concrete |
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ZHANG Gaozhan1,2, GUO Kaizheng3, CHENG Huaqiang4, DING Qingjun3
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1.School of Materials and Chemical Engineering， Anhui Jianzhu University， Hefei 230601，China;2.Anhui Province Key Laboratory of Advanced Building Materials， Anhui Jianzhu University， Hefei 230022，China;3.School of Materials Science and Engineering， Wuhan University of Technology， Wuhan 430070 ，China;4.Wuhan Municipal Construction Group Co.， Ltd.， Wuhan 430023 ，China
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| Abstract: |
| As lightweight aggregates are widely used and environment-friendly material that is promising to use in ultra-high performance concrete to reduce self-weight and shrinkage， they have become a hot topic of research at home and abroad in recent years. The design of ultra-high performance concrete is based on the theory of maximum bulk density， and the low strength and porous nature of lightweight aggregates can have a detrimental effect on their performance. The effects of different types of lightweight aggregates and preparation techniques on macroscopic properties are comprehensively discussed and compared， and the mechanisms of lightweight aggregates in ultra-high performance concrete and their enhancement mechanisms are then analysed. |
| Key words: lightweight aggregate ultra-high performance concrete preparation technique mechanism of action |
