高温中钢纤维混凝土抗压强度试验研究
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摘要
综述了国内外混凝土及纤维混凝土高温后及高温中的性能变化规律。研究了3种水胶比混凝土及钢纤维混凝土在20、200、400、600、800℃五个温度段高温中的抗压强度,结果表明:素混凝土及钢纤维混凝土高温中抗压强度都呈先升高再降低趋势,素混凝土和钢纤维混凝土分别在200、400℃时达到峰值,400℃时钢纤维的增强效果最明显。
Reviewed the domestic and foreign change of concrete and fiber reinforced concrete after high temperature and at high temperature.The compressive strength of three kinds of water binder ratio concrete and steel fiber reinforced concrete at the temperature of20、200、400、600 and 800 ℃ were studied.The results showed that the compressive strength of plain concrete and steel fiber reinforced concrete increased at first and then decreased,the plain concrete and steel fiber reinforced concrete up to the maximum strength at the temperature of 200 and 400 ℃,the steel fiber′ senhan cement effect is most obvious when 400 ℃.the higher the concrete strength,the better the fire resistance of concrete and steel fiber reinforced concrete at high temperature.
Reviewed the domestic and foreign change of concrete and fiber reinforced concrete after high temperature and at high temperature.The compressive strength of three kinds of water binder ratio concrete and steel fiber reinforced concrete at the temperature of20、200、400、600 and 800 ℃ were studied.The results showed that the compressive strength of plain concrete and steel fiber reinforced concrete increased at first and then decreased,the plain concrete and steel fiber reinforced concrete up to the maximum strength at the temperature of 200 and 400 ℃,the steel fiber′ senhan cement effect is most obvious when 400 ℃.the higher the concrete strength,the better the fire resistance of concrete and steel fiber reinforced concrete at high temperature.
引文
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[16]胡海涛,董毓利,刘伊琳.高强混凝土在高温中和高温后的抗压强度试验研究[J].混凝土与水泥制品,2004(1):18-20.
[17]王珍,张泽江,黄涛.高温中及冷却后高性能混凝土残余抗压强度试验[J].郑州大学学报(工学版),2010,31(5):78-81.
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[2]李翔宇.高温后纤维矿渣微粉混凝土力学性能研究[D].郑州:郑州大学,2009.
[3]邵莲芬,刘华伟.高温后纤维混凝土力学性能研究[J].新型建筑材料,2016,43(7):38-41.
[4]王义鹏.纤维矿渣微粉混凝土高温损伤和爆裂机理分析[J].混凝土,2016(5):54-58.
[5]高超,杨鼎宜,俞君宝,等.纤维混凝土高温后力学性能的研究[J].混凝土,2013(1):33-36.
[6]CHEN B,LI C L,CHEN L Z.Experimental study of mechanical properties of normal-strength concrete exposed to high temperatures at an early age[J].Fire Safety Journal,2009,44(7):997-1002.
[7]HE Z J,SONG Y P.Multiaxial tensile compressive strengths and failure criterion of plain high-performance concrete before and afterhightemperatures[J].Constructionand Building Materials,2010,24(4):498-504.
[8]CHOI E G,SHIN Y S.The structural behavior and simplified thermal analysis of normal-strength and high-strength concrete beams under fire[J].Engineering Structures,2011,33(4):1123-1132.
[9]金祖权,孙伟,侯保荣,等.混凝土的高温变形与微结构演化[J].东南大学学报(自然科学版),2010,40(3):619-623.
[10]杨淑慧.纤维矿渣微粉混凝土高温性能试验研究[D].郑州:郑州大学,2013.
[11]NASSER K W,NEVILLE A M.Creep of concrete at elevated temperature[J].Journal ACI,1965(10):1567-1579.
[12]冯竟竟,王强,韩松,等.高温诱致水泥浆体微观结构劣化现象的研究[J].电子显微学报,2010,29(6):560-568.
[13]杨淑慧,高丹盈,赵军.高温作用后矿渣微粉纤维混凝土的微观结构[J].东南大学学报,2010,40(增刊):102-106.
[14]元成方,高丹盈.聚丙烯纤维混凝土高温后的孔隙结构特征研究[J].华中科技大学学报,2014,42(4):122-126.
[15]许金余,刘健,李志武,等.高温中与高温后混凝土的冲击力学特性[J].建筑材料学报,2013,16(1):1-5.
[16]胡海涛,董毓利,刘伊琳.高强混凝土在高温中和高温后的抗压强度试验研究[J].混凝土与水泥制品,2004(1):18-20.
[17]王珍,张泽江,黄涛.高温中及冷却后高性能混凝土残余抗压强度试验[J].郑州大学学报(工学版),2010,31(5):78-81.
[18]段旭杰.钢纤维混凝土的高温爆裂行为与渗透性演变特征[D].北京:北京交通大学,2008.