1.Beijing Higher Institution Engineering Research Center of Civil Engineering Structure and Renewable Material,Beijing University of Civil Engineering and Architecture, Beijing 100044,China;
2.School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044,China;
3.Beijing Collaborative Innovation Center of Energy Conservation and Emissions Reduction Technology, Beijing 100044,China;
4.School of Civil Engineering, Henan Polytechnic University,Jiaozuo 454000,China
Experimental study was conductedonthe performance deterioration of high strength concrete (HSC, C60) subjected to different heating temperature and time,and comprehensive means of scanning electron microscopy, mercury pressure measurement, ultrasonic detect and Micro hardness tester were used to investigate the microstructure changes of HSC. The changes of color of the specimen, compressive strength, elastic modulus, mass loss, burst mechanism and microstructure of HSCwere analyzed. The results show that the color of HSC is shallow after different high temperature history, and it would be rusty red from one hour of 300℃ to two hours of 300℃, the appearance could be grayish white at 700℃ to 900℃. Moreover, HSC would burst at 500℃, and the cracking temperature is much lower than ordinary concrete. The root causes of the deterioration of macro-mechanical properties are gel molecules, cement hydrates and other thermal decomposition, so that the surface and internal cracks and micro-cracks, high-strength concrete microstructure gradually deteriorated. With the rise of heating temperature and time, the compressive strength, elastic modulus andmass loss of HSC decrease gradually. On this basis, the change of heating temperature is related to the performance degradation of HSC has a greater impact.
赵东拂1,2,3,高海静1,2,贾朋贺1,2,文豪4,杨健辉4. 高强混凝土经不同高温历程后性能劣化研究[J]. 振动与冲击, 2018, 37(4): 240-248.
ZHAO Dongfu1,2,3, GAO Haijing1,2,JIA Penghe1,2,WEN Hao4,YANG Jianhui4. Performance degradation of high strength concrete(HSC) after different high temperature history. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(4): 240-248.
[1] 王志坤,许金余,任韦波,等.高温下地聚合物混凝土损伤演化及动态本构模型研究[J].振动与冲击,2016,35(2): 110-115.
WANGZhikun, XUJinyu, RENWeibo, etal. Damage evolution and dynamic constitutive model of geopolymeric concrete at elevated temperature[J].Journal of Vibration and Shock,2016,35(2):110-115.
[2] 马保国,穆 松,张风臣,等.高温下高强高性能混凝土性能劣化的表征方法[J].铁道科学与工程学报,2007,4(5):40-44.
MABaoguo, MU Song, ZHANGFengchen,etal. Test methods of HSC/HPC deteriorated performance at high temperature [J].Journal of Railway Science and Engineering,2007,4(5):40-44.
[3] 高宇剑.高强混凝土火灾后力学性能退化及高温爆裂机理研究[D].中国矿业大学,2014,5:14-90.
GAOYujian.Study on the mechanical performancedegradation and spalling mechanism of highstrength concrete exposed to fire [D].China University of Mining and Technology,2014,5:14-90.
[4] Noumowe,A.Mechanical properties and microstructure of high strength concrete containing polypropylene fibers exposed to temperatures up to 200℃[J]. Cement and Concrete Research,2005,35(11):2192-2198.
[5] 李丽娟,谢伟峰,等.100 MPa 高强混凝土高温后性能研究[J].建筑材料学报,2008,11(1):100-104.
LILijuan, XIEWeifeng,et al. Performance of 100 MPa high strength concrete(HSC) after high temperature treatment[J].Journal of Building Materials,2008,11(1):100-104.
[6] 柳献,袁勇,叶光,等.高性能混凝土高温微观结构演化研究[J].同济大学学报(自然科学版),2008,36(11):1474-1478.
LIU Xian, YUAN Yong, YEGuang, et al. Study on pore structure evolution of high performanceconcrete with elevated temperatures [J].Journal ofTongji University (Natural Science),2008,36(11):1474-1478.
[7] 赵东拂,尤作凯,刘栋栋.高强混凝土过火温度与微观结构变化关系研究[J].建筑科学,2013,Vol29(3),p50-53.
ZHAODongfu, YOUZuokai, LIUDongdong.Investigation on the relationship between fire temperature and changeof microstructure in high strength concrete [J]. Building Science,2013,29(3):50-53.
[8] Gyu-Yong KIM,Young-Sun KIM,Tae-Gyu LEE.Mechanical properties of high-strengthconcrete subjected to high temperature by stressed test[J]. Transactions of Nonferrous Metals Society of China,2009,19:128-133.
[9] Long T. Phan, Nicholas J. Carino. Fire performance of high strength concrete: research needs[C].Advanced technology in structural engineering, structures congress, 2000:1-8.
[10] 赵东拂,刘梅.高强混凝土高温后剩余强度及无损检测试验研究[J].建筑结构学报,2015,36(2):365-372.
ZHAODongfu, LIU Mei. Experimental study on residual strength and nondestructive testing of high strength concrete after high temperature [J].Journal of Building Structures,2015,36(2):365-372.
[11] Zhenjun He, Wanlin Cao, Jiaxing Zhang.Multiaxial mechanicalpropertiesof plain recycledaggregate concrete[J].Magazine of ConcreteResearch,2014,67(8):401-413.
[12] 吕培印.混凝土单轴、双轴动态强度和变形试验研究[D].大连:大连理工大学,2002,3.
LVPeiyin. Experimental study on dynamic strength and deformation of concrete under uniaxial and biaxial action [D]. Dalian: Dalian University of Technology,2002,3.
[13] 何振军,宋玉普.高温后高强高性能混凝土双轴强度规律与破坏准则[J].工程力学,2009,27(2),124-130.
HEZhenjun, SONGYupu. Strength and failure criterion of plain high-strength high-performance concrete under biaxial compression surviving high temperatures[J].Engineering Mechanics,2009,27(2):124-130.
[14] Dongfu Zhao, Haijing Gao, Huixuan Liu,etal. Fatigue properties of plain concrete under trixial tension-compression-compression cyclic loading[J].Shock and Vibration,Vol.2017,10 pages.
[15] 鞠峰,吴丽雅.提高高强混凝土高温条件下抗爆裂性能的研究[J].混凝土,2003,(3):41-43.
JU Feng, WULiya. The research of improving the spalling resistance of the high strength concrete in the condition of high temperature[J].Concrete,2003,(3):41-43.
[16] 傅宇方,黄玉龙,潘智生,等.高温条件下混凝土爆裂机理研究进展[J].建筑材料学报,2006,9(3):323-329.
FUYufang, HUANGYulong, PANZhisheng, et al. Literature review of study on mechanism of explosive spalling in concrete at elevated temperatures[J]. Journal of Building Materials,2006,9(3):323-329.
[17] D.Bentz. Fibers percolation and spalling of high performance concrete [J]. ACI Material Journal,2000,97(3):351-359.
[18] 宋玉普,赵东拂,覃丽坤.混凝土强度及疲劳寿命试验样本容量分析[J].大连理工大学学报,2002,42(4):464-466.
SONGYupu, ZHAODongfu, TANLinkun. Sample size analyses for tests of concrete strength and fatigue life[J]. Journal of Dalian University of Technology,2002,42(4): 464-466.
[19] 过镇海.混凝土的强度和变形-试验基础和本构关系[M]. 清华大学出版社,1997.
GUO Zhenhai. Concrete strength and deformation test foundation and constitutive relationship [M].Tsinghua University Press,1997.
[20] Gai-Fei Peng.Evaluation of fire damage to high performance concrete[D]. The Hong Kong Polytechnic University,1999.
