• 文献检索
  • 文档翻译
  • 深度研究
  • 学术资讯
  • Suppr Zotero 插件Zotero 插件
  • 邀请有礼
  • 套餐&价格
  • 历史记录
应用&插件
Suppr Zotero 插件Zotero 插件浏览器插件Mac 客户端Windows 客户端微信小程序
定价
高级版会员购买积分包购买API积分包
服务
文献检索文档翻译深度研究API 文档MCP 服务
关于我们
关于 Suppr公司介绍联系我们用户协议隐私条款
关注我们

Suppr 超能文献

核心技术专利：CN118964589B侵权必究
粤ICP备2023148730 号-1Suppr @ 2026

文献检索

告别复杂PubMed语法，用中文像聊天一样搜索，搜遍4000万医学文献。AI智能推荐，让科研检索更轻松。

立即免费搜索

文件翻译

保留排版，准确专业，支持PDF/Word/PPT等文件格式，支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述，25分钟生成高质量综述，智能提取关键信息，辅助科研写作。

立即免费体验

高温对超高性能混凝土中预应力钢筋粘结强度的影响

Effect of Elevated Temperature on the Bond Strength of Prestressing Reinforcement in UHPC.

作者信息

Pokorný Petr, Kolísko Jiří, Čítek David, Kostelecká Michaela

机构信息

Klokner Institute, Czech Technical University in Prague, 166 08 Prague, Czech Republic.

出版信息

Materials (Basel). 2020 Nov 5;13(21):4990. doi: 10.3390/ma13214990.

DOI:10.3390/ma13214990
PMID:33167553
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7663915/
Abstract

The study explores the effect of elevated temperatures on the bond strength between prestressing reinforcement and ultra-high performance concrete (UHPC). Laboratory investigations reveal that the changes in bond strength correspond well with the changes in compressive strength of UHPC and their correlation can be mathematically described. Exposition of specimens to temperatures up to 200 °C does not reduce bond strength as a negative effect of increasing temperature is outweighed by the positive effect of thermal increase on the reactivity of silica fume in UHPC mixture. Above 200 °C, bond strength significantly reduces; for instance, a decrease by about 70% is observed at 800 °C. The decreases in compressive and bond strengths for temperatures above 400 °C are related to the changes of phase composition of UHPC matrix (as revealed by X-ray powder diffraction) and the changes in microstructure including the increase of porosity (verified by mercury intrusion porosimetry and observation of confocal microscopy) and development cracks detected by scanning electron microscopy. Future research should investigate the effect of relaxation of prestressing reinforcement with increasing temperature on bond strength reduction by numerical modelling.

摘要

本研究探讨了高温对预应力钢筋与超高性能混凝土（UHPC）之间粘结强度的影响。实验室研究表明，粘结强度的变化与UHPC抗压强度的变化密切相关，并且它们之间的相关性可以用数学方法描述。将试件暴露在高达200℃的温度下不会降低粘结强度，因为温度升高的负面影响被UHPC混合物中硅灰反应活性的热增加的正面影响所抵消。在200℃以上，粘结强度显著降低；例如，在800℃时观察到粘结强度下降约70%。400℃以上温度下抗压强度和粘结强度的降低与UHPC基体相组成的变化（通过X射线粉末衍射揭示）以及微观结构的变化有关，包括孔隙率的增加（通过压汞法和共聚焦显微镜观察验证）和扫描电子显微镜检测到的裂纹发展。未来的研究应通过数值模拟研究预应力钢筋随温度升高的松弛对粘结强度降低的影响。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/fc25d09987e2/materials-13-04990-g019.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/c1f3f5d6caed/materials-13-04990-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/f05dc493ad8f/materials-13-04990-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/dbe44fea4171/materials-13-04990-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/2fda90db150d/materials-13-04990-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/ebfc3e947adb/materials-13-04990-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/3a8f9a14c328/materials-13-04990-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/58cda8eaeee8/materials-13-04990-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/6b3cd470dd6e/materials-13-04990-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/60e3e49abb11/materials-13-04990-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/019a48c0aedb/materials-13-04990-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/077ab18bda77/materials-13-04990-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/d29d1cfbdd55/materials-13-04990-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/1a93f9777593/materials-13-04990-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/547b803a279a/materials-13-04990-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/17654e4f0d1b/materials-13-04990-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/899f500f2b4b/materials-13-04990-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/eb8dab8e938d/materials-13-04990-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/049c276741e1/materials-13-04990-g018.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/fc25d09987e2/materials-13-04990-g019.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/c1f3f5d6caed/materials-13-04990-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/f05dc493ad8f/materials-13-04990-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/dbe44fea4171/materials-13-04990-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/2fda90db150d/materials-13-04990-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/ebfc3e947adb/materials-13-04990-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/3a8f9a14c328/materials-13-04990-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/58cda8eaeee8/materials-13-04990-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/6b3cd470dd6e/materials-13-04990-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/60e3e49abb11/materials-13-04990-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/019a48c0aedb/materials-13-04990-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/077ab18bda77/materials-13-04990-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/d29d1cfbdd55/materials-13-04990-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/1a93f9777593/materials-13-04990-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/547b803a279a/materials-13-04990-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/17654e4f0d1b/materials-13-04990-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/899f500f2b4b/materials-13-04990-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/eb8dab8e938d/materials-13-04990-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/049c276741e1/materials-13-04990-g018.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8172/7663915/fc25d09987e2/materials-13-04990-g019.jpg

相似文献

1
Effect of Elevated Temperature on the Bond Strength of Prestressing Reinforcement in UHPC.高温对超高性能混凝土中预应力钢筋粘结强度的影响
Materials (Basel). 2020 Nov 5;13(21):4990. doi: 10.3390/ma13214990.
2
Comparison of the Mechanical Properties and Crack Expansion Mechanism of Different Content and Shapes of Brass-Coated Steel Fiber-Reinforced Ultra-High-Performance Concrete.不同含量及形状的镀黄铜钢纤维增强超高性能混凝土的力学性能与裂缝扩展机制比较
Materials (Basel). 2023 Mar 11;16(6):2257. doi: 10.3390/ma16062257.
3
Mechanical Properties of Ultra-High Performance Concrete before and after Exposure to High Temperatures.高温作用前后超高性能混凝土的力学性能
Materials (Basel). 2020 Feb 7;13(3):770. doi: 10.3390/ma13030770.
4
A state-of-the-art review of the physical and durability characteristics and microstructure behavior of ultra-high-performance geopolymer concrete.超高性能地质聚合物混凝土的物理和耐久性特性及微观结构行为的最新综述。
Heliyon. 2024 Jan 11;10(2):e24263. doi: 10.1016/j.heliyon.2024.e24263. eCollection 2024 Jan 30.
5
Insight into the Mechanical Performance of the UHPC Repaired Cementitious Composite System after Exposure to High Temperatures.高温作用后超高性能混凝土修复水泥基复合材料系统力学性能洞察
Materials (Basel). 2021 Jul 22;14(15):4095. doi: 10.3390/ma14154095.
6
Microstructure of ultra high performance concrete containing lithium slag.含锂渣的超高性能混凝土微观结构
J Hazard Mater. 2018 Jul 5;353:35-43. doi: 10.1016/j.jhazmat.2018.03.063. Epub 2018 Apr 3.
7
Physical, Mechanical, and Microstructure Characteristics of Ultra-High-Performance Concrete Containing Lightweight Aggregates.含有轻骨料的超高性能混凝土的物理、力学及微观结构特性
Materials (Basel). 2023 Jul 7;16(13):4883. doi: 10.3390/ma16134883.
8
Shear Strength of Ultra-High-Performance Concrete (UHPC) Beams without Transverse Reinforcement: Prediction Models and Test Data.无横向钢筋的超高性能混凝土（UHPC）梁的抗剪强度：预测模型与试验数据
Materials (Basel). 2022 Jul 8;15(14):4794. doi: 10.3390/ma15144794.
9
Bonding Behaviour of Steel Fibres in UHPFRC Based on Alkali-Activated Slag.基于碱激发矿渣的超高性能纤维增强混凝土中钢纤维的粘结行为
Materials (Basel). 2022 Mar 4;15(5):1930. doi: 10.3390/ma15051930.
10
Utilization of sewage sludge ash in ultra-high performance concrete (UHPC): Microstructure and life-cycle assessment.利用污水污泥灰在超高性能混凝土 (UHPC) 中的应用：微观结构和生命周期评估。
J Environ Manage. 2023 Jan 15;326(Pt A):116690. doi: 10.1016/j.jenvman.2022.116690. Epub 2022 Nov 11.

引用本文的文献

1
Comparison of the Mechanical Properties and Crack Expansion Mechanism of Different Content and Shapes of Brass-Coated Steel Fiber-Reinforced Ultra-High-Performance Concrete.不同含量及形状的镀黄铜钢纤维增强超高性能混凝土的力学性能与裂缝扩展机制比较
Materials (Basel). 2023 Mar 11;16(6):2257. doi: 10.3390/ma16062257.

本文引用的文献

1
Study of Toughness and Macro/Micro-Crack Development of Fibre-Reinforced Ultra-High Performance Concrete After Exposure to Elevated Temperature.纤维增强超高性能混凝土在高温作用后韧性及宏观/微观裂缝发展的研究
Materials (Basel). 2019 Apr 12;12(8):1210. doi: 10.3390/ma12081210.
2
Microstructural Investigation of Heat-Treated Ultra-High Performance Concrete for Optimum Production.用于优化生产的热处理超高性能混凝土的微观结构研究
Materials (Basel). 2017 Sep 20;10(9):1106. doi: 10.3390/ma10091106.