Comparison of axial behavior of RC columns using alkali-activated slag-based concrete and OPC concrete during and after fire

被引:2
作者
Liu, Yuzhong [1 ]
Tan, Kang Hai [2 ]
Du, Yunxing [1 ]
Su, Jie [1 ]
Hu, Xiang [1 ]
Mao, Yuguang [1 ]
Shi, Caijun [1 ]
机构
[1] Hunan Univ, Int Sci & Technol Innovat Ctr Green & Adv Civil En, Key Lab Green & Adv Civil Engn Mat & Applicat Tech, Key Lab Bldg Safety & Energy Efficiency,Minist Edu, Changsha 410082, Peoples R China
[2] Nanyang Technol Univ, Dept Civil & Environm Engn, Singapore 639798, Singapore
基金
中国国家自然科学基金;
关键词
Alkali-activated slag-based concrete; Axial capacity; Fire test; RC columns; Thermal response; HIGH-STRENGTH CONCRETE; MECHANICAL-PROPERTIES; GEOPOLYMER CONCRETE; ELEVATED-TEMPERATURE; RESIDUAL STRENGTH; DRYING SHRINKAGE; TRANSIENT CREEP; PERFORMANCE; CALCIUM; ENDURANCE;
D O I
10.1016/j.jobe.2023.107444
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
As no study on fire behavior of RC columns using alkali-activated concrete has been reported so far, this paper presents an experimental program comparatively investigating the thermal response and structural behavior of reinforced columns using alkali-activated slag-based concrete (AAC) and Portland cement-based concrete (PCC) during and after subjecting to the standard fire curve, with concrete strength and fire duration as test parameters. The experimental and analytical studies showed that compared with PCC columns, AAC columns had slightly lower temperature field but faster increase of axial deformation during fire. AAC and PCC columns using normal-strength concrete had equivalent residual axial capacity after exposure to fire. However, AAC columns using high-strength concrete retained greater load-bearing capacity than their PCC counterparts due to the spalling of high-strength PCC columns. AAC columns had lower axial stiffness than PCC columns at ambient temperature due to lower elastic modulus of AAC, but they had similar axial stiffness after exposure to fire of 2 h since PCC underwent more degradation of elastic modulus under high temperature. Furthermore, as concrete strength and fire duration increased, the axial contraction under heating and axial capacity loss after heating of AAC col-umns increased. A numerical method based on finite difference was used to predict the tem-perature field and corresponding residual axial capacity of RC columns after the fire.
引用
收藏
页数:15
相关论文
共 47 条
[1]   Performance of geopolymer high strength concrete wall panels and cylinders when exposed to a hydrocarbon fire [J].
Ali, A. Z. Mohd ;
Sanjayan, Jay ;
Guerrieri, Maurice .
CONSTRUCTION AND BUILDING MATERIALS, 2017, 137 :195-207
[2]   Quantifying transient creep effects on fire response of reinforced concrete columns [J].
Alogla, S. ;
Kodur, V. K. R. .
ENGINEERING STRUCTURES, 2018, 174 :885-895
[3]   Fire spalling behavior of high-strength concrete: A critical review [J].
Amran, Mugahed ;
Huang, Shan-Shan ;
Onaizi, Ali M. ;
Murali, G. ;
Abdelgader, Hakim S. .
CONSTRUCTION AND BUILDING MATERIALS, 2022, 341
[4]  
[Anonymous], 1999, ISO834 ASCE
[5]   Effects of calcium on setting mechanism of metakaolin-based geopolymer [J].
Chen, Xu ;
Sutrisno, Andre ;
Struble, Leslie J. .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2018, 101 (02) :957-968
[6]   Experimental research on post-fire behaviour of reinforced concrete columns [J].
Chen, Yih-Houng ;
Chang, Yun-Fei ;
Yao, George C. ;
Sheu, Maw-Shyong .
FIRE SAFETY JOURNAL, 2009, 44 (05) :741-748
[7]   Evaluation of the mechanical properties of 200 MPa ultra-high-strength concrete at elevated temperatures and residual strength of column [J].
Choe, Gyeongcheol ;
Kim, Gyuyong ;
Gucunski, Nenad ;
Lee, Seonghun .
CONSTRUCTION AND BUILDING MATERIALS, 2015, 86 :159-168
[8]   Effect of pore size distribution on drying shrinkage of alkali-activated slag concrete [J].
Collins, F ;
Sanjayan, JG .
CEMENT AND CONCRETE RESEARCH, 2000, 30 (09) :1401-1406
[9]   Workability and mechanical properties of alkali activated slag concrete [J].
Collins, FG ;
Sanjayan, JG .
CEMENT AND CONCRETE RESEARCH, 1999, 29 (03) :455-458
[10]   Fracture properties of alkali-activated slag and ordinary Portland cement concrete and mortar [J].
Ding, Yao ;
Dai, Jian-Guo ;
Shi, Cai-Jun .
CONSTRUCTION AND BUILDING MATERIALS, 2018, 165 :310-320