高温后钢筋与纳米TiO2混凝土粘结性能演化规律研究

doi:10.16552/j.cnki.issn1001-1625.2024.0693

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (1): 101-111.DOI: 10.16552/j.cnki.issn1001-1625.2024.0693

高温后钢筋与纳米TiO₂混凝土粘结性能演化规律研究

赵燕茹¹, 李环¹, 李玉萍², 贾宗明^3,4, 石磊⁵

1.内蒙古工业大学土木工程学院,呼和浩特 010051;
2.国网内蒙古东部电力有限公司经济技术研究院,呼和浩特 010020;
3.内蒙古工业大学理学院,呼和浩特 010051;
4.内蒙古建筑职业技术学院建筑与规划学院,呼和浩特 010070;
5.翱华工程技术股份有限公司,呼和浩特 010010

收稿日期:2024-06-17 修订日期:2024-10-26 出版日期:2025-01-15 发布日期:2025-01-23
作者简介:赵燕茹(1971—),女,博士,教授。主要从事混凝土力学及耐久性能方面的研究。E-mail:zhaoyanru710523@126.com
基金资助:
国家自然科学基金(12162025);内蒙古自然科学基金(2021LHMS05010)

Evolution Law of Bond Performance Between Steel Bar and Nano-TiO₂ Concrete after High Temperature

ZHAO Yanru¹, LI Huan¹, LI Yuping², JIA Zongming^3,4, SHI Lei⁵

1. College of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;
2. State Grid Inner Mongolia Eastern Electric Power Co., Ltd. Economic and Technological Research Institute, Hohhot 010020, China;
3. College of Science, Inner Mongolia University of Technology, Hohhot 010051, China;
4. College of Architecture and Planning, Inner Mongolia Technical College of Construction, Hohhot 010070, China;
5. Aohua Engineering Technology Co., Ltd., Hohhot 010010, China

Received:2024-06-17 Revised:2024-10-26 Published:2025-01-15 Online:2025-01-23

摘要/Abstract

摘要： 通过中心拉拔试验和高温试验,分析了高温后不同纳米TiO₂掺量对钢筋混凝土粘结性能的影响,讨论了高温后不同纳米TiO₂掺量下钢筋混凝土残余抗压强度与极限粘结应力损伤度的关系。结果表明:高温后,掺入适量的纳米TiO₂可以增强钢筋混凝土的粘结性能,延缓混凝土高温损伤,但当纳米TiO₂掺量超过2%(质量分数)时,钢筋与混凝土的粘结性能削弱;建立了高温后不同纳米TiO₂掺量下钢筋混凝土粘结强度预测公式,试验值与预测值吻合度较好。

关键词: 混凝土, 纳米TiO₂, 钢筋, 高温, 粘结性能

Abstract: Through the central pull-out test and high temperature test, the influence of different nano-TiO₂ content on the bond performance of reinforced concrete after high temperature was analyzed. The relationship between residual compressive strength and ultimate bond stress damage degree of reinforced concrete with different nano-TiO₂ content after high temperature was discussed. The results show that after high temperature, the addition of appropriate amount of nano-TiO₂ can enhance the bond performance of reinforced concrete and delay the high temperature damage of concrete. However, when the content of nano-TiO₂ exceeds 2% (mass fraction), the bond performance between steel bar and concrete is weakened. The prediction formula of bond strength of reinforced concrete with different nano-TiO₂ content after high temperature is established. The experimental value is in good agreement with predicted value.

Key words: concrete, nano-TiO₂, steel bar, high temperature, bond performance

中图分类号:

TU528.1

赵燕茹, 李环, 李玉萍, 贾宗明, 石磊. 高温后钢筋与纳米TiO₂混凝土粘结性能演化规律研究[J]. 硅酸盐通报, 2025, 44(1): 101-111.

ZHAO Yanru, LI Huan, LI Yuping, JIA Zongming, SHI Lei. Evolution Law of Bond Performance Between Steel Bar and Nano-TiO₂ Concrete after High Temperature[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(1): 101-111.

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高温后钢筋与纳米TiO₂混凝土粘结性能演化规律研究

Evolution Law of Bond Performance Between Steel Bar and Nano-TiO₂ Concrete after High Temperature

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