Compressive Performance of Concrete after High Temperature Strengthened with ECC

被引:0
作者
Pengyu Yang
Jialing Che
Haifeng Liu
机构
[1] Ningxia University,Department of Civil Engineering and Hydraulic Engineering
[2] Ningxia Center for Research On Earthquake Protection and Disaster Mitigation in Civil Engineering,undefined
来源
Iranian Journal of Science and Technology, Transactions of Civil Engineering | 2022年 / 46卷
关键词
Concrete; High temperature; Engineered cementitious composites; Compressive performance; Strengthened;
D O I
暂无
中图分类号
学科分类号
摘要
When concrete members are exposed to fire, the compressive performance of the material will be severely reduced. To ensure the safety of the members, it is necessary to analyze the impact of high temperature on the performance of concrete members and strengthen them appropriately. ECC with remarkable tensile strain-hardening characteristics and excellent compression deformation ability is the right choice as a reinforcing material. This experiment analyzes the impact of high temperature on concrete and uses engineered cementitious composite (ECC) to strengthen the heat-damaged concrete. The influence of different conditions such as the thickness of the surface layer, the ECC’s tensile performance, the binder, the schemes of reinforcement, and the different temperatures on the reinforcement effect was compared. The test results showed that ECC can effectively improve the brittle failure characteristics of concrete after high temperature and increase the bearing capacity, ductility, and residual strength. Moreover, the reinforcement effect will improve significantly with the increase in the surface layer’s thickness. For reinforcement materials with similar compressive properties, excellent tensile properties can achieve better effects. Applying binder can delay the peeling of the layer. The surface layer is better than the diagonal reinforcement. Even if the concrete is severely damaged by high temperature, the surface layer can still effectively improve the compression performance of the heat-damaged concrete and maintain it at a high level. In summary, ECC can significantly improve the compressive performance of heat-damaged concrete.
引用
收藏
页码:185 / 199
页数:14
相关论文
共 93 条
[1]  
Arioz O(2007)Effects of elevated temperatures on properties of concrete Fire Saf J 42 516-522
[2]  
Abbass W(2016)Flexural behavior of high-strength concrete beams reinforced with a strain hardening cement-based composite layer Constr Build Mater 125 927-935
[3]  
Khan MI(2015)Strength model for heat-damaged reinforced concrete circular columns confined with carbon fibre reinforced poly-merfabrics J Reinf Plast Compos 34 1833-1855
[4]  
Al-Kamaki YS(2017)Experimental and numerical study of strengthening of heat-damaged RC beams using NSM CFRP strips Constr Build Mater 154 899-913
[5]  
Al-Mahaidi R(2013)Effectiveness of advanced composites in repairing heat-damaged RC columns Mater Struct 46 1843-1860
[6]  
Bennetts L(2015)Strengthening of shear deficient reinforced concrete beams retrofitted with cement-based composites Jordan J Civ Eng 9 59-70
[7]  
Al-Mahaidi R(2011)Strengthening fire-damaged concrete by confinement with fibre-reinforced polymer wraps Eng Struct 33 3381-3391
[8]  
Abdouka K(2013)Factors affecting the ultimate condition of FRP-Wrapped concrete columns J Compos Constr 17 67-78
[9]  
Jadooe A(2015)Bond Properties of GFRP laminate with heat-damaged concrete J Compos Constr 45 1-8
[10]  
Al-Nimry H(2014)Specimen size effect on the residual properties of engineered cementitious composites subjected to high temperatures Cement Concr Compos 37 240-248