CRC混凝土梁钢筋氯离子腐蚀及弯曲开裂性能研究
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摘要
橡胶集料混凝土(CRC)是一种把橡胶微粒作为水泥混凝土的组成材料配制而成的新型混凝土。由于橡胶的加入,使其具有低弹模、大变形、高阻尼、能量耗散多、抗氯离子腐蚀及较好的抗裂性等优点。
本文首次研究了在氯离子电加速腐蚀环境下,橡胶集料混凝土梁中钢筋的锈蚀情况。对0.45和0.55两种水灰比,0 kg/m3、50kg/m3、100 kg/m3、150 kg/m3四种掺量的橡胶集料混凝土梁中钢筋的锈蚀情况进行对比试验,测量了在3.5%NaCl溶液中5d和10d两个时间段中钢筋的电位值、电路中串联电阻的电压值、钢筋锈蚀失重率和混凝土梁腐蚀后的初始裂缝宽度。试验结果表明,随着在混凝土中掺入橡胶集料量的增加明显使混凝土中钢筋的锈蚀情况减轻。
本文对比进行了经过氯离子腐蚀的混凝土梁和没有经过氯离子腐蚀的8组一共24根混凝土梁的四点受弯试验,测量并记录了梁的挠度、下表面的应变和加载过程中裂缝开展的情况。并引入参数k1和k2,k1定义为相同配比下,混凝土梁开裂荷载值与立方体抗压强度值的比值,k2定义为相同配比下,混凝土梁破坏荷载值与立方体抗压强度值的比值,以此定量研究掺入橡胶集料对混凝土梁开裂荷载和破坏荷载的改善情况。试验结果表明,掺入越多的橡胶集料对提高钢筋混凝土梁的抗裂性是越有帮助的,并会使其受弯后裂缝发展越慢。
Crumb Rubber Concrete(CRC) is a new type of concrete mixed with rubber crumbs. As a result of the addition of rubber so that CRC shows the characteristics of low Young’s Modulus, large deformation, high energy dissipation, anti-chloride -corrosion and great crack resistance.
This paper first study on the corrosion of reinforced in Crumb Rubber Concrete beams in the environment of chloride electric accelerated corrosion. The contrast test is done on the corrosion of reinforced in Crumb Rubber Concrete beams with 0.45 and 0.55 water-cement ratio and 0kg/m3, 50kg/m3, 100kg/m3, 150kg/m3 Rubber content. And the electric potential, voltage of series resistance, corrosion rate and initial crack width of concrete beams in 3.5% NaCl solution are measured in 5days and 10days two periods of time. The experimental results show that, with the content of rubber in concrete increased, the corrosion of reinforced concrete is significantly alleviated.
In this paper, a contrastive four-point bending test is done on a total of 8 groups of 24 concrete beams which include the chloride-corrosion ones and the absence of chloride-corrosion ones. And the beam deflection, lower surface of the strain and the process of cracking with load carrying out are measured and recorded. The parameters k1 is introduced to define as the radio of the concrete cracking load values to the cube compressive strength in the same concrete radio. The parameters k2 is introduced to define as the radio of the concrete damaging load values to the cube compressive strength in the same concrete radio. This parameters can be used to make quantitative study on the improved situation of the concrete cracking load values and damaging load values with incorporation of rubber aggregate. The experimental results show that, the more incorporation of rubber aggregate is more helpful for reinforced concrete beams to the crack resistance and make the development of flexural cracks more slower.
本文首次研究了在氯离子电加速腐蚀环境下,橡胶集料混凝土梁中钢筋的锈蚀情况。对0.45和0.55两种水灰比,0 kg/m3、50kg/m3、100 kg/m3、150 kg/m3四种掺量的橡胶集料混凝土梁中钢筋的锈蚀情况进行对比试验,测量了在3.5%NaCl溶液中5d和10d两个时间段中钢筋的电位值、电路中串联电阻的电压值、钢筋锈蚀失重率和混凝土梁腐蚀后的初始裂缝宽度。试验结果表明,随着在混凝土中掺入橡胶集料量的增加明显使混凝土中钢筋的锈蚀情况减轻。
本文对比进行了经过氯离子腐蚀的混凝土梁和没有经过氯离子腐蚀的8组一共24根混凝土梁的四点受弯试验,测量并记录了梁的挠度、下表面的应变和加载过程中裂缝开展的情况。并引入参数k1和k2,k1定义为相同配比下,混凝土梁开裂荷载值与立方体抗压强度值的比值,k2定义为相同配比下,混凝土梁破坏荷载值与立方体抗压强度值的比值,以此定量研究掺入橡胶集料对混凝土梁开裂荷载和破坏荷载的改善情况。试验结果表明,掺入越多的橡胶集料对提高钢筋混凝土梁的抗裂性是越有帮助的,并会使其受弯后裂缝发展越慢。
Crumb Rubber Concrete(CRC) is a new type of concrete mixed with rubber crumbs. As a result of the addition of rubber so that CRC shows the characteristics of low Young’s Modulus, large deformation, high energy dissipation, anti-chloride -corrosion and great crack resistance.
This paper first study on the corrosion of reinforced in Crumb Rubber Concrete beams in the environment of chloride electric accelerated corrosion. The contrast test is done on the corrosion of reinforced in Crumb Rubber Concrete beams with 0.45 and 0.55 water-cement ratio and 0kg/m3, 50kg/m3, 100kg/m3, 150kg/m3 Rubber content. And the electric potential, voltage of series resistance, corrosion rate and initial crack width of concrete beams in 3.5% NaCl solution are measured in 5days and 10days two periods of time. The experimental results show that, with the content of rubber in concrete increased, the corrosion of reinforced concrete is significantly alleviated.
In this paper, a contrastive four-point bending test is done on a total of 8 groups of 24 concrete beams which include the chloride-corrosion ones and the absence of chloride-corrosion ones. And the beam deflection, lower surface of the strain and the process of cracking with load carrying out are measured and recorded. The parameters k1 is introduced to define as the radio of the concrete cracking load values to the cube compressive strength in the same concrete radio. The parameters k2 is introduced to define as the radio of the concrete damaging load values to the cube compressive strength in the same concrete radio. This parameters can be used to make quantitative study on the improved situation of the concrete cracking load values and damaging load values with incorporation of rubber aggregate. The experimental results show that, the more incorporation of rubber aggregate is more helpful for reinforced concrete beams to the crack resistance and make the development of flexural cracks more slower.
引文
[1]朱涵,新型弹性混凝土的研究综述,天津建设科技,2004, 14(2):35~37
[2]Han Zhu, Adding Crumb Rubber into Exterior Wall Materials.Waste Management and Research, 2003, 20: 407~413
[3]Han Zhu, Rubber Crumbs in Concrete, Concrete Technology Today, 2003, 135(8): 30~33
[4]Zhu, H. Crumb Rubber Concrete, Rapra Handbook on Polymers Use in Construction, Rapra Technology, Shawbury, UK, edited Gune Ri AKOVLI, 2004
[5]袁琳,橡胶集料钢筋混凝土构件受弯性能初探:[硕士学位论文],天津;天津大学,2005
[6]许静,朱涵,刘春生,等,橡胶集料混凝土阻尼比的初步试验研究,混凝土,2005(11):40~42
[7]刘春生,朱涵,李志国,张军,袁琳,橡胶细集料水泥砂浆基本性能研究,混凝土,2005,(7):38~42
[8]宋少民,刘娟红,金树新,橡胶粉改性的高韧性混凝土研究,混凝土与水泥制品,1997,(1):10~12
[9]Ground Waste Tire Rubber,Transportation Research Record,1997,1574:80~88
[10]Khatib Z K,Bayomy F M,Rubberized Portland Cement Concrete,Journal of Materials in Civil Engineering,1999,11(3):206~213
[11]Hernandez-Olivares F,Barluenga G,Bollati M,et al,Static and Dynamic Behaviour of Recycled Tyre Rubber-Filled Concrete,Cement and Concrete Research, 2002,32(10):1587~1596
[12]Eldin, Neil & Senouci, A. B. Rubber-tired Particles as Concrete Aggregate, Journal of Materials in Civil Engineering. 1993, 5(4): 478 ~ 496
[13]金伟良,赵羽习,混凝土结构耐久性研究的回顾与展望,浙江大学学报,2002,36(4):371~381
[14]冯乃谦,混凝土及混凝土结构物的耐久性,施工技术,1995,7:35~37
[15]陈肇元,徐有邻,钱稼茹,土建结构工程的安全性与耐久性,建筑技术,2002,33(4):248~253
[16]周新刚,混凝土结构的耐久性与损伤防治.北京:中国建材工业出版社,1999
[17]姚燕,中国混凝土材料耐久性研究的新进展,混凝土与水泥制品,2002,12:39~42
[18]Mehta P K.Concrete durability-fifty years progress.Proc.of 2nd Inter.Conf.on Concrete Durability,ACI SP126~1.1991:1~31
[19]洪乃丰,钢筋混凝土基础设施腐蚀与耐久性,In:陈肇元.土建结构工程的安全性和耐久性,北京:中国建筑工业出版社,2003,76~83
[20]洪乃丰,基础设施腐蚀防护和耐久性问与答,北京:化学工业出版社,2003
[21]蒋元駉,韩素芳,混凝土工程病害与修补加固,北京:海洋出版社,1996,317~347
[22]柯伟,中国腐蚀调查报告,北京:化学工业出版社,2003,118~122
[23]洪定海,混凝土中钢筋的腐蚀与保护,北京:中国铁道出版社,1998
[24]洪乃丰,混凝土中氯盐与钢筋腐蚀的几个相关问题,工业建筑,2003,33(11):39~42,82
[25]Antonio Costa,Julio Appleton.Case studies of concrete deterioration in a marine environment in Portugal.Cement&Concrete Composite.2002,24:167~179
[26]港口工程结构设计使用年限调查专题研究报告,广州四航工程技术研究院,2004,2
[27]张宝兰,卫淑珊,华南海港钢筋混凝土暴露十年试验,水运工程,1999,3:6~13
[28]林宝玉,单国良,南方海港浪溅区钢筋混凝土耐久性研究,水运工程,1998,1:1~15
[29]刘春生,橡胶集料混凝土的研究与应用:[硕士学位论文],天津;天津大学,2005
[30]洪定海,混凝土中钢筋的腐蚀与保护,北京:中国铁道出版社,1998
[31]洪乃丰,混凝土中钢筋腐蚀与防护技术(3),工业建筑,1999,29(10):60~63
[32]富文权,韩素芳,混凝土工程裂缝分析与控制,北京:中国铁道出版社,2002,151~171
[33]金伟良,赵羽习,混凝土结构耐久性,北京:科学出版社,2002
[34]牛荻涛,混凝土结构耐久性与寿命预测,北京:科学出版社,2003:34~94
[35]Shamsad Ahmad.Reinforcement corrosion in concrete structures,its monitoring and service life prediction-a review.Cement and Concrete Composites.2003,25:459~471
[36]富文权,韩素芳,混凝土工程裂缝分析与控制,北京:中国铁道出版社,2002:151~171
[37]樊云昌,曹兴国,陈怀荣,混凝土中钢筋腐蚀的防护与修复,北京:中国铁道出版社,2001
[38]Krikpatrick T J,Weyers R E,Anderson-Cook C M,Sprinkel M M.Probabilistic model for the chloride induced corrosion service life of bridge decks.Cement and Concrete Research.2002,32:1943~1960
[39]王立成,氯盐环境条件下混凝土氯离子侵蚀模型及其研究进展,水运工程,2004,363(4):5~9
[40]赵铁军,朱金铨,钢筋混凝土的氯离子腐蚀与耐久性设计,施工技术,1995,11:37-38
[41]S J Williamson,L A Clark.An Investigation of the Amount of Corrosion Required to Cause Cracking.Report from School od Civil Engineering,The University of Brimingham.
[42]张伟平,混凝土结构钢筋腐蚀损伤识别及其耐久性:[博士学位论文],上海:同济大学土木工程系,1999
[43]戴靠山,李果,蒋德稳.钢筋混凝土人工气候加速腐蚀的试验研究.淮海工学院学报,2002,11(4):60~63
[44]Rasheeduzzafar.Corrosion Cracking in Relation to Bar Diameter,Cover and Concrete Quality.Journal of Materials in Civil Eng.1992,4:327~342
[45]Clark L A.Effect of Corrosion on Reinforcement Bond Strength.Proceeding of 5th International Conference on Structural Faults and Repair.1993,3
[46]G J Al-Sulaimaini,M Kaleemullah,L A Basunbul and Rasheeduzzafar. Influence of Corrosion and Cracking on Bond Behavior and Strength of Reinforce Concrete Members.ACI Structural Journal.1990,87:220~231
[47]徐善华,牛荻涛,陈新孝,钢筋混凝土结构锈胀寿命分析,建筑科学,2002,18(5):32~35
[48]徐善华,牛荻涛,王庆霖,钢筋混凝土结构碳化耐久性分析,建筑技术开发,2002,29(8):8~10
[49]沈德建,李祖阳,吴胜兴,环境温度对混凝土中钢筋腐蚀率的影响,建筑技术开发,2002,29(3):34~36
[50]王建业,徐家文,电解加工原理及应用,北京:国防工业出版社,2001.3~9
[2]Han Zhu, Adding Crumb Rubber into Exterior Wall Materials.Waste Management and Research, 2003, 20: 407~413
[3]Han Zhu, Rubber Crumbs in Concrete, Concrete Technology Today, 2003, 135(8): 30~33
[4]Zhu, H. Crumb Rubber Concrete, Rapra Handbook on Polymers Use in Construction, Rapra Technology, Shawbury, UK, edited Gune Ri AKOVLI, 2004
[5]袁琳,橡胶集料钢筋混凝土构件受弯性能初探:[硕士学位论文],天津;天津大学,2005
[6]许静,朱涵,刘春生,等,橡胶集料混凝土阻尼比的初步试验研究,混凝土,2005(11):40~42
[7]刘春生,朱涵,李志国,张军,袁琳,橡胶细集料水泥砂浆基本性能研究,混凝土,2005,(7):38~42
[8]宋少民,刘娟红,金树新,橡胶粉改性的高韧性混凝土研究,混凝土与水泥制品,1997,(1):10~12
[9]Ground Waste Tire Rubber,Transportation Research Record,1997,1574:80~88
[10]Khatib Z K,Bayomy F M,Rubberized Portland Cement Concrete,Journal of Materials in Civil Engineering,1999,11(3):206~213
[11]Hernandez-Olivares F,Barluenga G,Bollati M,et al,Static and Dynamic Behaviour of Recycled Tyre Rubber-Filled Concrete,Cement and Concrete Research, 2002,32(10):1587~1596
[12]Eldin, Neil & Senouci, A. B. Rubber-tired Particles as Concrete Aggregate, Journal of Materials in Civil Engineering. 1993, 5(4): 478 ~ 496
[13]金伟良,赵羽习,混凝土结构耐久性研究的回顾与展望,浙江大学学报,2002,36(4):371~381
[14]冯乃谦,混凝土及混凝土结构物的耐久性,施工技术,1995,7:35~37
[15]陈肇元,徐有邻,钱稼茹,土建结构工程的安全性与耐久性,建筑技术,2002,33(4):248~253
[16]周新刚,混凝土结构的耐久性与损伤防治.北京:中国建材工业出版社,1999
[17]姚燕,中国混凝土材料耐久性研究的新进展,混凝土与水泥制品,2002,12:39~42
[18]Mehta P K.Concrete durability-fifty years progress.Proc.of 2nd Inter.Conf.on Concrete Durability,ACI SP126~1.1991:1~31
[19]洪乃丰,钢筋混凝土基础设施腐蚀与耐久性,In:陈肇元.土建结构工程的安全性和耐久性,北京:中国建筑工业出版社,2003,76~83
[20]洪乃丰,基础设施腐蚀防护和耐久性问与答,北京:化学工业出版社,2003
[21]蒋元駉,韩素芳,混凝土工程病害与修补加固,北京:海洋出版社,1996,317~347
[22]柯伟,中国腐蚀调查报告,北京:化学工业出版社,2003,118~122
[23]洪定海,混凝土中钢筋的腐蚀与保护,北京:中国铁道出版社,1998
[24]洪乃丰,混凝土中氯盐与钢筋腐蚀的几个相关问题,工业建筑,2003,33(11):39~42,82
[25]Antonio Costa,Julio Appleton.Case studies of concrete deterioration in a marine environment in Portugal.Cement&Concrete Composite.2002,24:167~179
[26]港口工程结构设计使用年限调查专题研究报告,广州四航工程技术研究院,2004,2
[27]张宝兰,卫淑珊,华南海港钢筋混凝土暴露十年试验,水运工程,1999,3:6~13
[28]林宝玉,单国良,南方海港浪溅区钢筋混凝土耐久性研究,水运工程,1998,1:1~15
[29]刘春生,橡胶集料混凝土的研究与应用:[硕士学位论文],天津;天津大学,2005
[30]洪定海,混凝土中钢筋的腐蚀与保护,北京:中国铁道出版社,1998
[31]洪乃丰,混凝土中钢筋腐蚀与防护技术(3),工业建筑,1999,29(10):60~63
[32]富文权,韩素芳,混凝土工程裂缝分析与控制,北京:中国铁道出版社,2002,151~171
[33]金伟良,赵羽习,混凝土结构耐久性,北京:科学出版社,2002
[34]牛荻涛,混凝土结构耐久性与寿命预测,北京:科学出版社,2003:34~94
[35]Shamsad Ahmad.Reinforcement corrosion in concrete structures,its monitoring and service life prediction-a review.Cement and Concrete Composites.2003,25:459~471
[36]富文权,韩素芳,混凝土工程裂缝分析与控制,北京:中国铁道出版社,2002:151~171
[37]樊云昌,曹兴国,陈怀荣,混凝土中钢筋腐蚀的防护与修复,北京:中国铁道出版社,2001
[38]Krikpatrick T J,Weyers R E,Anderson-Cook C M,Sprinkel M M.Probabilistic model for the chloride induced corrosion service life of bridge decks.Cement and Concrete Research.2002,32:1943~1960
[39]王立成,氯盐环境条件下混凝土氯离子侵蚀模型及其研究进展,水运工程,2004,363(4):5~9
[40]赵铁军,朱金铨,钢筋混凝土的氯离子腐蚀与耐久性设计,施工技术,1995,11:37-38
[41]S J Williamson,L A Clark.An Investigation of the Amount of Corrosion Required to Cause Cracking.Report from School od Civil Engineering,The University of Brimingham.
[42]张伟平,混凝土结构钢筋腐蚀损伤识别及其耐久性:[博士学位论文],上海:同济大学土木工程系,1999
[43]戴靠山,李果,蒋德稳.钢筋混凝土人工气候加速腐蚀的试验研究.淮海工学院学报,2002,11(4):60~63
[44]Rasheeduzzafar.Corrosion Cracking in Relation to Bar Diameter,Cover and Concrete Quality.Journal of Materials in Civil Eng.1992,4:327~342
[45]Clark L A.Effect of Corrosion on Reinforcement Bond Strength.Proceeding of 5th International Conference on Structural Faults and Repair.1993,3
[46]G J Al-Sulaimaini,M Kaleemullah,L A Basunbul and Rasheeduzzafar. Influence of Corrosion and Cracking on Bond Behavior and Strength of Reinforce Concrete Members.ACI Structural Journal.1990,87:220~231
[47]徐善华,牛荻涛,陈新孝,钢筋混凝土结构锈胀寿命分析,建筑科学,2002,18(5):32~35
[48]徐善华,牛荻涛,王庆霖,钢筋混凝土结构碳化耐久性分析,建筑技术开发,2002,29(8):8~10
[49]沈德建,李祖阳,吴胜兴,环境温度对混凝土中钢筋腐蚀率的影响,建筑技术开发,2002,29(3):34~36
[50]王建业,徐家文,电解加工原理及应用,北京:国防工业出版社,2001.3~9
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