粗骨料取代下的高性能再生混凝土率敏性研究
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摘要
采用分离式霍普金森压杆(SHPB)试验方法对粗骨料取代率为0%、30%、50%和100%的再生混凝土进行冲击试验,研究了应力-应变关系曲线、动态抗压强度、动态弹性模量以及破坏形态受应变率影响的变化规律。试验表明,应力-应变关系曲线开始段呈线性关系,随应变率的增大,线性段斜率增大,持续范围扩大,峰值应力变大;峰值应力具有率敏性,随应变率增大,峰值应力不断增加,取代率对峰值应力的影响差别不明显;动态弹性模量也具有率敏性,呈正相关关系,取代率不同,其率敏性程度有所差异;随着应变率增大,试件破坏程度随之加剧,从完整无裂缝到瞬间崩裂成碎块。
The impact tests on recycled concrete with recycled coarse aggregate replacement ratios of0%,30%,50% and 100% are conducted experimentally by the Split Hopkinson Pressure Bar(SHPB).The change rules of stress-strain curve,dynamic compressive strength,dynamic elastic modulus and failure form of high-performance recycled concrete influenced by the strain rate are studied.The experimental results show that at the beginning stage,the stress-strain curves are approximately linear.The slope and the length of the linear section as well as the peak stress increase with the strain rate increasing.The peak stress is sensitive to the strain rate and increases gradually as the strain rate increases.The difference among the effects of replacement ratios on the peak stress is not obviously obtained.Dynamic elastic modulus also has the property of rate sensitivity and is positively correlated with the strain rate.The degree of strain rate sensitivity is different for different replacement ratios.The degree of specimen damage gets more serious for larger strain rate.The specimen presents a completely uncracked form for low strain rates,while it breaks into pieces in an instant for high strain rate.
The impact tests on recycled concrete with recycled coarse aggregate replacement ratios of0%,30%,50% and 100% are conducted experimentally by the Split Hopkinson Pressure Bar(SHPB).The change rules of stress-strain curve,dynamic compressive strength,dynamic elastic modulus and failure form of high-performance recycled concrete influenced by the strain rate are studied.The experimental results show that at the beginning stage,the stress-strain curves are approximately linear.The slope and the length of the linear section as well as the peak stress increase with the strain rate increasing.The peak stress is sensitive to the strain rate and increases gradually as the strain rate increases.The difference among the effects of replacement ratios on the peak stress is not obviously obtained.Dynamic elastic modulus also has the property of rate sensitivity and is positively correlated with the strain rate.The degree of strain rate sensitivity is different for different replacement ratios.The degree of specimen damage gets more serious for larger strain rate.The specimen presents a completely uncracked form for low strain rates,while it breaks into pieces in an instant for high strain rate.
引文
[1]肖建庄,李佳彬,兰阳.再生混凝土技术研究最新进展与评述[J].混凝土,2003,25(10):17-20(XIAOJianzhuang,LI Jiabin,LAN Yang.Research on recycled aggregate concrete-A review[J].Concrete,2003,25(10):17-20(in Chinese))
[2]Salem R M,Burdette E G.Role of chemical and mineral admixtures on physical properties and frost-resistance of recycled aggregate concrete[J].ACI Materials Journal,1998,95(5):558-563.
[3]冯乃谦.普通混凝土,高强混凝土与高性能混凝土[J].建筑技术,2004,35(1):20-23(FENG Naiqian.Ordinary concrete,high strength concrete and high performance concrete[J].Architecture Technology,2004,35(1):20-23(in Chinese))
[4]Ilker B T,engel S.Properties of concretes produced with waste concrete aggregate[J].Cement&Concrete Research,2004,34(8):1307-1312.
[5]Etxeberria M,Vázquez E,MaríA,et al.Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete[J].Cement&Concrete Research,2007,37(5):735-742.
[6]Belén G F,Fernando M A,Diego C L,et al.Stress-strain relationship in axial compression for concrete using recycled saturated coarse aggregate[J].Construction&Building Materials,2011,25(5):2335-2342.
[7]Bairagi N K,Ravande K,Pareek V K.Behaviour of concrete with different proportions of natural and recycled aggregates[J].Resources Conservation&Recycling,1993,9(1-2):109-126.
[8]肖建庄.再生混凝土单轴受压应力-应变全曲线试验研究[J].同济大学学报(自然科学版),2007,35(11):1445-1449(XIAO Jianzhuang.Experimental investigation on complete stress-strain curve of recycled concrete under uniaxial loading[J].Journal of Tongji University(Nature Science),2007,35(11):1445-1449(in Chinese))
[9]陈宗平,徐金俊,郑华海,等.再生混凝土基本力学性能试验及应力应变本构关系[J].建筑材料学报,2013,16(1):24-32(CHEN Zongping,XU Jinjun,ZHENG Huahai,et al.Basic mechanical properties test and stressstrain constitutive relations of recycled coarse aggregate concrete[J].Journal of Building Materials,2013,16(1):24-32(in Chinese))
[10]胡时胜.Hopkinson压杆实验技术的应用进展[J].实验力学,2005,20(4):589-594(HU Shisheng.The application development of experiment technique of Hopkinson pressure bar[J].Journal of Experimental Mechanics,2005,20(4):589-594(in Chinese))
[11]Tang T X,Malvern L E,Jenkins D A.Dynamic compressive testing of concrete and mortar[C].Engineering Mechanics in Civil Engineering,ASCE,2015.
[12]Liu F,Chen G,Li L,et al.Study of impact performance of rubber reinforced concrete[J].Construction&Building Materials,2012,36(4):604-616.
[13]JGJ55-2011,普通混凝土配合比设计规程[S].北京:中国建筑工业出版社,2011(JGJ55-2011,The design regulation of mix ratio of ordinary concrete[S].Beijing:China Architecture&Building Press,2011(in Chinese))
[14]张亚梅,秦鸿根,孙伟,等.再生混凝土配合比设计初探[J].混凝土与水泥制品,2002(1):7-9(ZHANGYamei,QIN Honggen,SUN Wei,et al.Preliminary study on mix proportion design of recycled aggregate concrete[J].China Concrete and Cement Products,2002(1):7-9(in Chinese))
[15]李勇飞,隋玉明.桥梁勘察中红砂岩单轴抗压强度标准值的计算方法探讨[J].路基工程,2015,6(6):66-69(LI Yongfei,SUI Yuming.Discussion on the calculation method of standard value of red sandstone uniaxial compressive strength in the bridge site survey[J].Subgrade Engineering,2015,6(6):66-69(in Chinese))
[16]肖建庄,李佳彬,孙振平,等.再生混凝土的抗压强度研究[J].同济大学学报(自然科学版),2004,32(12):1558-1561(XIAO Jianzhuang,LI Jiabin,SUN Zhenping,et al.Study on compressive of recycled aggregate concrete[J].Journal of Tongji University(Nature Science),2004,32(12):1558-1561(in Chinese))
[17]Cai Haiyong,Zhang Min,Dang Lingbo.Experimental study on compressive strength of recycled aggregate concrete with different replacement ratios[J].Applied Mechanics and Materials,2012(6):1277-1280.
[18]常彦铮.再生混凝土抗压试验的数值模拟与等效抗压强度折减系数研究[D].西安建筑科技大学,2011:17-21(CHANG Yanzheng.Study on reduction factor of equivalent conpressive strength and numerical simulation of compression test of recycled concrete[D].Xi′an University of Architecture and Technology,2011:17-21(in Chinese))
[19]肖建庄.再生混凝土[M].北京:中国建筑工业出版社,2008(XIAO Jianzhuang.Recycled aggregate concrete[M].Beijing:China Architecture&Building Press,2008(in Chinese))
[20]Skalak R.Longitudinal impact of a semi-infinite circular elastic bar[J].Journal of Applied Mechanics-transactions of the Asme,,1957,24:59-64.
[21]胡功笠,刘荣忠,齐爱东,等.混凝土材料的SHPB试验及动态性能分析[J].南京理工大学学报(自然科学版),2005(4):420-424(HU Gongli,LIU Rongzhong,QI Aidong,et al.SHPB experiment and dynamic properties of concrete[J].Journal of Nanjing University of Science and Technology(Nature Science),2005(4):420-424(in Chinese))
[22]张志刚,孔大庆,宫光明,等.高应变率下混凝土动态力学性能SHPB实验[J].解放军理工大学学报(自然科学版),2007(6):611-618(ZHANG Zhigang,KONG Daqing,GONG Guangmign,et al.Dynamic mechanical behavior of concrete under high strain rate using SHPB[J].Journal of PLA University of Science and Technology(Nature Science),2007(6):611-618(in Chinese))
[23]李龙,肖建庄.再生骨料混凝土动力特性的探讨[C].第三届全国再生混凝土学术交流会,2012(LI Long,XIAO Jianzhuang.Discussion on dynamica behavior of recycled aggregate concrete[C].The 3rd National Recycled Aggregate Concrete Academic Conference,2012(in Chinese))
[24]Rossi P,Toutlemonde F.Effect of loading rate on the tensile behavior of concrete:description of the physical mechanisms[J].Materials and Structures,1996,29:116-118.
[25]Li Q M,Meng H.About the dynamics strength enhancement of concrete like-materials in a split Hopkinson pressure bar test[J].International of Solid sand Structures,2003,40:343-360.
[26]Rossi P,Boulay C.Influence of free water in concrete on the cracking process[J].Magazine of Concrete Research,1990,42:143-146.
[27]Rossi P,van Mier J G M,Boulay C,et al.The dynamie behavior of concrete:influence of free water[J].Materials and Structures,1992,25:509-514.
[28]刘军忠,许金余,吕晓聪,等.冲击压缩荷载下角闪岩的动态力学性能试验研究[J].岩石力学与工程学报,2009,28(10):2113-2120(LIU Junzhogn,XU Jinyu,LV Xiaocong,et al.Experimental study on dynamical properties of amphibolites under impact compressive loading[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(10):2113-2120(in Chinese))
[29]严成,欧卓成,段卓平,等.脆性材料动态强度应变率效应[J].爆炸与冲击,2011,31(4):423-427(YANCheng,OU Zhuocheng,DUAN Zhuoping,et al.Strain-rate effect on dynamic strength of brittle materials[J].Explosion and Shock Waves,2011,31(4):423-427(in Chinese))
[30]宫凤强,陆道辉,李夕兵,等.不同应变率下砂岩动态强度准则的试验研究[J].岩土力学,2013(9):2433-2441,2429(GONG Fengqiang,LU Daohui,LI Xibing,et al.Experimental research of sandstone dynamic strength criterion under different strain rates[J].Rock and Soil Mechanics,2013(9):2433-2441,2429(in Chinese))
[31]John R,Antoun T,Rajendran A M.Effect of strain rate and size on tensile strength of concrete[J].Shock Compression of Condensed Matter,1992,1994:501-504.
[32]Garnier C.Etude du comportement dynamique des structures composites réalisées par LRI:applicationàl′impact etàla fatigue[J].Toulouse Inpt,2011.
[2]Salem R M,Burdette E G.Role of chemical and mineral admixtures on physical properties and frost-resistance of recycled aggregate concrete[J].ACI Materials Journal,1998,95(5):558-563.
[3]冯乃谦.普通混凝土,高强混凝土与高性能混凝土[J].建筑技术,2004,35(1):20-23(FENG Naiqian.Ordinary concrete,high strength concrete and high performance concrete[J].Architecture Technology,2004,35(1):20-23(in Chinese))
[4]Ilker B T,engel S.Properties of concretes produced with waste concrete aggregate[J].Cement&Concrete Research,2004,34(8):1307-1312.
[5]Etxeberria M,Vázquez E,MaríA,et al.Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete[J].Cement&Concrete Research,2007,37(5):735-742.
[6]Belén G F,Fernando M A,Diego C L,et al.Stress-strain relationship in axial compression for concrete using recycled saturated coarse aggregate[J].Construction&Building Materials,2011,25(5):2335-2342.
[7]Bairagi N K,Ravande K,Pareek V K.Behaviour of concrete with different proportions of natural and recycled aggregates[J].Resources Conservation&Recycling,1993,9(1-2):109-126.
[8]肖建庄.再生混凝土单轴受压应力-应变全曲线试验研究[J].同济大学学报(自然科学版),2007,35(11):1445-1449(XIAO Jianzhuang.Experimental investigation on complete stress-strain curve of recycled concrete under uniaxial loading[J].Journal of Tongji University(Nature Science),2007,35(11):1445-1449(in Chinese))
[9]陈宗平,徐金俊,郑华海,等.再生混凝土基本力学性能试验及应力应变本构关系[J].建筑材料学报,2013,16(1):24-32(CHEN Zongping,XU Jinjun,ZHENG Huahai,et al.Basic mechanical properties test and stressstrain constitutive relations of recycled coarse aggregate concrete[J].Journal of Building Materials,2013,16(1):24-32(in Chinese))
[10]胡时胜.Hopkinson压杆实验技术的应用进展[J].实验力学,2005,20(4):589-594(HU Shisheng.The application development of experiment technique of Hopkinson pressure bar[J].Journal of Experimental Mechanics,2005,20(4):589-594(in Chinese))
[11]Tang T X,Malvern L E,Jenkins D A.Dynamic compressive testing of concrete and mortar[C].Engineering Mechanics in Civil Engineering,ASCE,2015.
[12]Liu F,Chen G,Li L,et al.Study of impact performance of rubber reinforced concrete[J].Construction&Building Materials,2012,36(4):604-616.
[13]JGJ55-2011,普通混凝土配合比设计规程[S].北京:中国建筑工业出版社,2011(JGJ55-2011,The design regulation of mix ratio of ordinary concrete[S].Beijing:China Architecture&Building Press,2011(in Chinese))
[14]张亚梅,秦鸿根,孙伟,等.再生混凝土配合比设计初探[J].混凝土与水泥制品,2002(1):7-9(ZHANGYamei,QIN Honggen,SUN Wei,et al.Preliminary study on mix proportion design of recycled aggregate concrete[J].China Concrete and Cement Products,2002(1):7-9(in Chinese))
[15]李勇飞,隋玉明.桥梁勘察中红砂岩单轴抗压强度标准值的计算方法探讨[J].路基工程,2015,6(6):66-69(LI Yongfei,SUI Yuming.Discussion on the calculation method of standard value of red sandstone uniaxial compressive strength in the bridge site survey[J].Subgrade Engineering,2015,6(6):66-69(in Chinese))
[16]肖建庄,李佳彬,孙振平,等.再生混凝土的抗压强度研究[J].同济大学学报(自然科学版),2004,32(12):1558-1561(XIAO Jianzhuang,LI Jiabin,SUN Zhenping,et al.Study on compressive of recycled aggregate concrete[J].Journal of Tongji University(Nature Science),2004,32(12):1558-1561(in Chinese))
[17]Cai Haiyong,Zhang Min,Dang Lingbo.Experimental study on compressive strength of recycled aggregate concrete with different replacement ratios[J].Applied Mechanics and Materials,2012(6):1277-1280.
[18]常彦铮.再生混凝土抗压试验的数值模拟与等效抗压强度折减系数研究[D].西安建筑科技大学,2011:17-21(CHANG Yanzheng.Study on reduction factor of equivalent conpressive strength and numerical simulation of compression test of recycled concrete[D].Xi′an University of Architecture and Technology,2011:17-21(in Chinese))
[19]肖建庄.再生混凝土[M].北京:中国建筑工业出版社,2008(XIAO Jianzhuang.Recycled aggregate concrete[M].Beijing:China Architecture&Building Press,2008(in Chinese))
[20]Skalak R.Longitudinal impact of a semi-infinite circular elastic bar[J].Journal of Applied Mechanics-transactions of the Asme,,1957,24:59-64.
[21]胡功笠,刘荣忠,齐爱东,等.混凝土材料的SHPB试验及动态性能分析[J].南京理工大学学报(自然科学版),2005(4):420-424(HU Gongli,LIU Rongzhong,QI Aidong,et al.SHPB experiment and dynamic properties of concrete[J].Journal of Nanjing University of Science and Technology(Nature Science),2005(4):420-424(in Chinese))
[22]张志刚,孔大庆,宫光明,等.高应变率下混凝土动态力学性能SHPB实验[J].解放军理工大学学报(自然科学版),2007(6):611-618(ZHANG Zhigang,KONG Daqing,GONG Guangmign,et al.Dynamic mechanical behavior of concrete under high strain rate using SHPB[J].Journal of PLA University of Science and Technology(Nature Science),2007(6):611-618(in Chinese))
[23]李龙,肖建庄.再生骨料混凝土动力特性的探讨[C].第三届全国再生混凝土学术交流会,2012(LI Long,XIAO Jianzhuang.Discussion on dynamica behavior of recycled aggregate concrete[C].The 3rd National Recycled Aggregate Concrete Academic Conference,2012(in Chinese))
[24]Rossi P,Toutlemonde F.Effect of loading rate on the tensile behavior of concrete:description of the physical mechanisms[J].Materials and Structures,1996,29:116-118.
[25]Li Q M,Meng H.About the dynamics strength enhancement of concrete like-materials in a split Hopkinson pressure bar test[J].International of Solid sand Structures,2003,40:343-360.
[26]Rossi P,Boulay C.Influence of free water in concrete on the cracking process[J].Magazine of Concrete Research,1990,42:143-146.
[27]Rossi P,van Mier J G M,Boulay C,et al.The dynamie behavior of concrete:influence of free water[J].Materials and Structures,1992,25:509-514.
[28]刘军忠,许金余,吕晓聪,等.冲击压缩荷载下角闪岩的动态力学性能试验研究[J].岩石力学与工程学报,2009,28(10):2113-2120(LIU Junzhogn,XU Jinyu,LV Xiaocong,et al.Experimental study on dynamical properties of amphibolites under impact compressive loading[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(10):2113-2120(in Chinese))
[29]严成,欧卓成,段卓平,等.脆性材料动态强度应变率效应[J].爆炸与冲击,2011,31(4):423-427(YANCheng,OU Zhuocheng,DUAN Zhuoping,et al.Strain-rate effect on dynamic strength of brittle materials[J].Explosion and Shock Waves,2011,31(4):423-427(in Chinese))
[30]宫凤强,陆道辉,李夕兵,等.不同应变率下砂岩动态强度准则的试验研究[J].岩土力学,2013(9):2433-2441,2429(GONG Fengqiang,LU Daohui,LI Xibing,et al.Experimental research of sandstone dynamic strength criterion under different strain rates[J].Rock and Soil Mechanics,2013(9):2433-2441,2429(in Chinese))
[31]John R,Antoun T,Rajendran A M.Effect of strain rate and size on tensile strength of concrete[J].Shock Compression of Condensed Matter,1992,1994:501-504.
[32]Garnier C.Etude du comportement dynamique des structures composites réalisées par LRI:applicationàl′impact etàla fatigue[J].Toulouse Inpt,2011.