高温作用下高强地聚物混凝土力学性能研究

梁冬瑶; 李福昆; 杨青梅; 李春华; 李明晖; 杨海峰

doi:10.3724/j.gyjzG24082707

高温作用下高强地聚物混凝土力学性能研究

doi: 10.3724/j.gyjzG24082707

1. 广西路建集团建筑工程有限公司, 南宁 530004;
2. 广西大学土木建筑工程学院, 南宁 530004;
3. 同济大学土木工程学院, 上海 200092;
4. 中国建筑股份有限公司阿尔及利亚公司, 北京 100125

基金项目:

广西科技重大专项项目（AA23023034）；国家自然科学基金项目（52178123）；广西自然科学基金项目（2023GXNSFAA026178）。

详细信息

作者简介:
梁冬瑶，高级工程师，主要从事技术管理，科技研发与应用，重点研发应用有机硅复合材料、新型混凝土材料，289530378@qq.com。

通讯作者:
杨青梅，博士研究生，主要从事固废资源化利用、新型混凝土材料方面研究，2410569@tongji.edu.cn。

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出版历程
- 收稿日期: 2024-08-27
- 网络出版日期: 2026-07-06

Research on the Mechanical Properties of High-Strength Geopolymer Concrete Exposed to Elevated Temperatures

1. Guangxi Road Construction Group Construction Engineering Co., Ltd., Nanning 530004, China;
2. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China;
3. School of Civil Engineering, Tongji University, Shanghai 200092, China;
4. China State Construction Company Limited Algeria Company, Beijing 100125, China

摘要

摘要: 地聚物作为低碳环保胶凝材料，具备优异的力学性能，是高强混凝土的理想水泥替代品。然而，高温作用会导致混凝土性能退化，影响结构安全。以温度（20，200，400，600 ℃）和混凝土强度（C70、C80）为变量，研究高强地聚物混凝土（HGPC）在单轴受压下的力学性能。结果表明，温度升高，HGPC的破坏模式由贯穿骨料转变为地聚物基体与骨料的界面过渡区破坏，质量和抗压强度显著下降，600 ℃时，质量损失率达 6.8%，fcuT/fcu20降至常温值的 0.39。此外，HGPC 的fcT/fcuT 低于普通混凝土和普通高强混凝土，并随温度升高进一步降低。结合高温后HGPC受压力学演化特征，构建考虑损伤参数的应力-应变本构模型，经验证模型计算结果与试验实测数据一致性较好，可为高温环境下地聚物混凝土结构设计提供理论依据。
- 高强地聚物混凝土 /
- 高温试验 /
- 单轴抗压强度 /
- 轴心抗压强度 /
- 应力-应变本构关系 /
- 质量损失
Abstract: As a low-carbon and eco-friendly cementitious material， geopolymer exhibits excellent mechanical properties and is an ideal substitute for cement in high-strength concrete. However， elevated temperatures degrade the performance of concrete， compromising structural safety. This study investigated the mechanical properties of high-strength geopolymer concrete （HGPC） under uniaxial compression， considering temperature （20 ℃， 200 ℃， 400 ℃， and 600 ℃） and concrete strength grade （C70， C80） as variables. The results indicated that the failure mode of HGPC shifted from aggregate penetration to failure at the interfacial transition zone， accompanied by significant mass and strength loss. At 600 ℃， the mass loss rate reached 6.8%， while fcuT/fcu20 dropped to 0.39 of its room-temperature value. Additionally， fcT/fcuT was lower than that of conventional and high-strength concrete， and it further decreased with increasing temperature. A stress-strain constitutive model incorporating damage parameters was developed， demonstrating strong agreement with experimental data and providing theoretical support for HGPC applications in high-temperature environments.
- high-strength geopolymer concrete /
- high-temperature test /
- uniaxial compressive strength /
- axial compressive strength /
- stress-strain constitutive relation /
- mass loss

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