搅拌方式对水泥稳定碎石混合料抗压强度的影响
|
摘要
为了提高水泥稳定碎石混合料的搅拌均匀性,改善抗压强度,采用正交试验的方法,对水泥质量比(用量,下文同)为4%的悬浮密实型混合料,通过分析振动搅拌条件下不同位置混合料的7d无侧限抗压强度及其变异系数,确定搅拌时间、湿拌时间、振动频率和搅拌速度的合理取值与匹配,并在此基础上对3%、4%和5%水泥用量的悬浮密实型和骨架密实型混合料,开展振动搅拌与普通搅拌的对比试验,分析振动搅拌对水泥稳定碎石混合料抗压强度的影响。结果表明:在振动搅拌条件下,搅拌时间对混合料抗压强度的影响最大,振动频率和搅拌速度次之,湿拌时间的影响最小,并且随着各搅拌参数取值的增大,抗压强度增加且变异系数降低;在选用合理搅拌参数的基础上,振动搅拌能够显著提升混合料的强度指标,但随着水泥用量增加,振动搅拌混合料的强度提高率降低;与普通强制搅拌相比,振动搅拌悬浮密实型混合料的强度平均提高20.7%,骨架密实型混合料的强度平均提高16.1%,强度变异系数降低约40%;在相同的水泥用量下,振动搅拌和普通强制搅拌的骨架密实型混合料强度都明显高于悬浮密实型,但振动搅拌对悬浮密实型混合料更为敏感,强度提升幅度更大。
To improve mixing uniformity of cement stabilized macadam and its compressive strength,for suspended dense mixture with 4% cement content,7 dunconfined compressive strength and its variation coefficient from different locations in the same batch under vibratory mixing(VM)conditions were analyzed to get the reasonable mixing time,wet-mixing time,vibration frequency and mixing speed by orthogonal test method.On this bases,the comparative test of VM and conventional compulsory mixing(CM)was conducted on unconfined compressive strength of suspended dense mixture and skeleton dense mixture with the cement content of 3%,4%,5%,respectively.The influence of VM on compressive strength of cement stabilized macadam was analyzed.The results show that mixing parameters affect the compressive strength under vibratory condition.The most influence factor is mixing time,followed by vibration frequency and mixing speed,whilst the least effect factor is wet-mixing time.The compressivestrength of the mixture increases,and its variation coefficient decreases with the increase of the mixing parameters.VM can significantly improve the strength of the mixture based on the reasonable parameters,but the strength gets less promotion by VM with the increase of cement content.The compressive strength of suspended dense mixture and skeleton dense mixture under vibratory conditions increase by 20.7% and 16.1% respectively,on average.And the variation coefficient decreases by 40%,compared with CM.The compressive strength of skeleton dense mixture under VM and CM is significantly higher than that of suspended dense mixture with the same amount of cement,but VM is more sensitive to the suspended dense type with greater promotion.
To improve mixing uniformity of cement stabilized macadam and its compressive strength,for suspended dense mixture with 4% cement content,7 dunconfined compressive strength and its variation coefficient from different locations in the same batch under vibratory mixing(VM)conditions were analyzed to get the reasonable mixing time,wet-mixing time,vibration frequency and mixing speed by orthogonal test method.On this bases,the comparative test of VM and conventional compulsory mixing(CM)was conducted on unconfined compressive strength of suspended dense mixture and skeleton dense mixture with the cement content of 3%,4%,5%,respectively.The influence of VM on compressive strength of cement stabilized macadam was analyzed.The results show that mixing parameters affect the compressive strength under vibratory condition.The most influence factor is mixing time,followed by vibration frequency and mixing speed,whilst the least effect factor is wet-mixing time.The compressivestrength of the mixture increases,and its variation coefficient decreases with the increase of the mixing parameters.VM can significantly improve the strength of the mixture based on the reasonable parameters,but the strength gets less promotion by VM with the increase of cement content.The compressive strength of suspended dense mixture and skeleton dense mixture under vibratory conditions increase by 20.7% and 16.1% respectively,on average.And the variation coefficient decreases by 40%,compared with CM.The compressive strength of skeleton dense mixture under VM and CM is significantly higher than that of suspended dense mixture with the same amount of cement,but VM is more sensitive to the suspended dense type with greater promotion.
引文
[1]王旭东,张蕾,曾峰,等.《公路路面基层施工技术细则》实施手册[M].北京:人民交通出版社,2015.WANG Xu-dong,ZHANG Lei,ZENG Feng,et al.Application Handbook of Technical Guidelines for Construction of Highway Roadbases[M].Beijing:China Communications Press,2015.
[2]刘洪海,焦生杰,沈晓龙.水泥稳定碎石施工设备匹配技术研究[J].筑路机械与施工机械化,2010,27(1):75-78.LIU Hong-hai,JIAO Sheng-jie,SHEN Xiao-long.Research on Reasonable Matching Technology for Construction Equipment of Cement Stabilized Macadam[J].Road Machinery&Construction Mechanization,2010,27(1):75-78.
[3]冯忠绪,王卫中,姚运仕,等.搅拌机合理转速研究[J].中国公路学报,2006,19(2):116-120.FENG Zhong-xu,WANG Wei-zhong,YAO Yun-shi,et al.Study of Mixer Rational Rotation Speed[J].China Journal of Highway and Transport,2006,19(2):116-120.
[4]冯忠绪,赵利军,姚运仕,等.搅拌机低效区及其消除方法[J].长安大学学报:自然科学版,2005,25(6):82-85.FENG Zhong-xu,ZHAO Li-jun,YAO Yun-shi,et al.Mixing Inefficient Zone of Concrete Mixer and Its Eliminating Methods[J].Journal of Chang’an University:Natural Science Edition,2005,25(6):82-85.
[5]曹源文,肖伟,王凡宇,等.PVA纤维束双卧轴搅拌器的数值模拟[J].筑路机械与施工机械化,2016,33(11):84-87.CAO Yuan-wen,XIAO Wei,WANG Fan-yu,et al.Numerical Simulation of PVA Fiber Bundles in Double-shaft Mixer[J].Road Machinery&Construction Mechanization,2016,33(11):84-87.
[6]DILS J,DE SCHUTTER G,BOEL V.Influence of Mixing Procedure and Mixer Type on Fresh and Hardened Properties of Concrete:A Review[J].Materials and Structures,2012,45(11):1673-1683.
[7]FERRARIS C F.Concrete Mixing Methods and Concrete Mixers:State of the Art[J].Journal of Research of the National Institute of Standards and Technology,2001,106(2):391-399.
[8]CHANG P K,PENG Y N.Influence of Mixing Techniques on Properties of High Performance Concrete[J].Cement and Concrete Research,2001,31(1):87-95.
[9]徐世林,焦生杰,闫玉奎,等.MOH材料最佳搅拌时间的试验研究[J].筑路机械与施工机械化,2017,34(3):34-38.XU Shi-lin,JIAO Sheng-jie,YAN Yu-kui,et al.Experimental Research on Optimum Mixing Time of MOH Materials[J].Road Machinery&Construction Mechanization,2017,34(3):34-38.
[10]YAO Y Y,FENG Z X,CHEN S B,et al.A Doubleblade Mixer for Concrete with Improved Mixing Quality[J].Arabian Journal for Science and Engineering,2016,41(12):4809-4816.
[11]HEMALATHA T,SUNDAR K R R,MURTHY A R,et al.Influence of Mixing Protocol on Fresh and Hardened Properties of Self-compacting Concrete[J].Construction and Building Materials,2015,98:119-127.
[12]冯建生,冯忠绪,王博.振动搅拌对不同配合比混凝土性能的影响[J].广西大学学报:自然科学版,2015,40(3):636-642.FENG Jian-sheng,FENG Zhong-xu,WANG Bo.Effects of Vibratory Mixing on the Performance of Concrete with Different Mixing Proportions[J].Journal of Guangxi University:Natural Science Edition,2015,40(3):636-642.
[13]王正浩,尹晓明,刘大任.小型振动搅拌机的混沌特性[J].沈阳建筑大学学报:自然科学版,2009,25(1):175-178.WANG Zheng-hao,YIN Xiao-ming,LIU Da-ren.Chaotic Characteristics of Small Concrete Vibratory Mixer[J].Journal of Shenyang Jianzhu University:Natural Science,2009,25(1):175-178.
[14]SHEN H,DUAN Z S,LI F.The Evaluation About Vibratory Mixing Methods[J].Applied Mechanics and Materials,2012,217-219:2678-2682.
[15]李汝凯,洛桑慈成,王火明,等.振动搅拌水泥稳定砂砾强度性能对比研究[J].重庆交通大学学报:自然科学版,2017,36(11):33-36.LI Ru-kai,LUOSANG Ci-cheng,WANG Huo-ming,et al.Comparative Study on Strength Performance of Cement Stabilized Gravel Mix Under Vibration Stirring[J].Joural of Chongqing Jiaotong University:Natural Science Edition,2017,36(11):33-36.
[16]冯忠绪.混凝土搅拌理论与设备[M].北京:人民交通出版社,2001.FENG Zhong-xu.Concrete Mixing Theory and Equipment[M].Beijing:China Communications Press,2001.
[17]付昌会,冯忠绪,张磊.搅拌方式对混凝土含气量及孔结构的影响[J].郑州大学学报:工学版,2011,32(2):42-45.FU Chang-hui,FENG Zhong-xu,ZHANG Lei.Effects of Mixing Method on Concrete Air Content and Pore Distribution[J].Journal of Zhengzhou University:Engineering Science Edition,2011,32(2):42-45.
[18]赵利军,翁军良,冯忠绪.引气及搅拌作用对混凝土性能的影响[J].建筑科学与工程学报,2013,30(1):32-37.ZHAO Li-jun,WENG Jun-liang,FENG Zhong-xu.Effects of Air Entraining and Mixing on Concrete Performance[J].Journal of Architecture and Civil Engineering,2013,30(1):32-37.
[19]赵利军,杜占领,冯忠绪.新型振动搅拌装置的试验研究[J].中国公路学报,2005,18(2):120-122.ZHAO Li-jun,DU Zhan-ling,FENG Zhong-xu.Experimental Research on New Vibratory Mixer[J].China Journal of Highway and Transport,2005,18(2):120-122.
[20]韩恒梅,李军.水泥稳定碎石路面基层的强度性能试验研究[J].筑路机械与施工机械化,2016,33(10):41-45.HAN Heng-mei,LI Jun.Experimental Study on Strength Properties of Cement Stabilized Aggregate Base[J].Road Machinery&Construction Mechanization,2016,33(10):41-45.
[21]张振兴,张良奇.振动搅拌技术在路面水稳基层施工中的应用[J].筑路机械与施工机械化,2016,33(6):31-36.ZHANG Zhen-xing,ZHANG Liang-qi.Application of Vibratory Mixing Technology in Construction of Cement-stabilized Base Course[J].Road Machinery&Construction Mechanization,2016,33(6):31-36.
[22]赵悟,王博,赵利军,等.改善搅拌过程提高混凝土强度[J].长安大学学报:自然科学版,2015,35(1):148-153.ZHAO Wu,WANG Bo,ZHAO Li-jun,et al.Improving Concrete Strength Based on the Mixing Process[J].Journal of Chang’an University:Natural Science Edition,2015,35(1):148-153.
[23]冯忠绪,王卫中.增强混凝土界面粘结强度的方法[J].长安大学学报:自然科学版,2009,29(1):91-94.FENG Zhong-xu,WANG Wei-zhong.Reinforcement Methods of Concrete Interfacial Bond Strength[J].Journal of Chang’an University:Natural Science Edition,2009,29(1):91-94.
[24]胡龙泉,蒋应军,陈忠达,等.骨架密实型水泥稳定碎石路用性能[J].交通运输工程学报,2001,1(4):37-40.HU Long-quan,JIANG Ying-jun,CHEN Zhong-da,et al.Road Performance of Cement Stabilized Aggregate of Dense Framework Structure[J].Journal of Traffic and Transportation Engineering,2001,1(4):37-40.
[25]张良奇,冯忠绪.混凝土搅拌过程及其评价[J].长安大学学报:自然科学版,2011,31(2):101-105.ZHANG Liang-qi,FENG Zhong-xu.Process of Concrete Mixing and Its Evaluation[J].Journal of Chang’an University:Natural Science Edition,2011,31(2):101-105.
[2]刘洪海,焦生杰,沈晓龙.水泥稳定碎石施工设备匹配技术研究[J].筑路机械与施工机械化,2010,27(1):75-78.LIU Hong-hai,JIAO Sheng-jie,SHEN Xiao-long.Research on Reasonable Matching Technology for Construction Equipment of Cement Stabilized Macadam[J].Road Machinery&Construction Mechanization,2010,27(1):75-78.
[3]冯忠绪,王卫中,姚运仕,等.搅拌机合理转速研究[J].中国公路学报,2006,19(2):116-120.FENG Zhong-xu,WANG Wei-zhong,YAO Yun-shi,et al.Study of Mixer Rational Rotation Speed[J].China Journal of Highway and Transport,2006,19(2):116-120.
[4]冯忠绪,赵利军,姚运仕,等.搅拌机低效区及其消除方法[J].长安大学学报:自然科学版,2005,25(6):82-85.FENG Zhong-xu,ZHAO Li-jun,YAO Yun-shi,et al.Mixing Inefficient Zone of Concrete Mixer and Its Eliminating Methods[J].Journal of Chang’an University:Natural Science Edition,2005,25(6):82-85.
[5]曹源文,肖伟,王凡宇,等.PVA纤维束双卧轴搅拌器的数值模拟[J].筑路机械与施工机械化,2016,33(11):84-87.CAO Yuan-wen,XIAO Wei,WANG Fan-yu,et al.Numerical Simulation of PVA Fiber Bundles in Double-shaft Mixer[J].Road Machinery&Construction Mechanization,2016,33(11):84-87.
[6]DILS J,DE SCHUTTER G,BOEL V.Influence of Mixing Procedure and Mixer Type on Fresh and Hardened Properties of Concrete:A Review[J].Materials and Structures,2012,45(11):1673-1683.
[7]FERRARIS C F.Concrete Mixing Methods and Concrete Mixers:State of the Art[J].Journal of Research of the National Institute of Standards and Technology,2001,106(2):391-399.
[8]CHANG P K,PENG Y N.Influence of Mixing Techniques on Properties of High Performance Concrete[J].Cement and Concrete Research,2001,31(1):87-95.
[9]徐世林,焦生杰,闫玉奎,等.MOH材料最佳搅拌时间的试验研究[J].筑路机械与施工机械化,2017,34(3):34-38.XU Shi-lin,JIAO Sheng-jie,YAN Yu-kui,et al.Experimental Research on Optimum Mixing Time of MOH Materials[J].Road Machinery&Construction Mechanization,2017,34(3):34-38.
[10]YAO Y Y,FENG Z X,CHEN S B,et al.A Doubleblade Mixer for Concrete with Improved Mixing Quality[J].Arabian Journal for Science and Engineering,2016,41(12):4809-4816.
[11]HEMALATHA T,SUNDAR K R R,MURTHY A R,et al.Influence of Mixing Protocol on Fresh and Hardened Properties of Self-compacting Concrete[J].Construction and Building Materials,2015,98:119-127.
[12]冯建生,冯忠绪,王博.振动搅拌对不同配合比混凝土性能的影响[J].广西大学学报:自然科学版,2015,40(3):636-642.FENG Jian-sheng,FENG Zhong-xu,WANG Bo.Effects of Vibratory Mixing on the Performance of Concrete with Different Mixing Proportions[J].Journal of Guangxi University:Natural Science Edition,2015,40(3):636-642.
[13]王正浩,尹晓明,刘大任.小型振动搅拌机的混沌特性[J].沈阳建筑大学学报:自然科学版,2009,25(1):175-178.WANG Zheng-hao,YIN Xiao-ming,LIU Da-ren.Chaotic Characteristics of Small Concrete Vibratory Mixer[J].Journal of Shenyang Jianzhu University:Natural Science,2009,25(1):175-178.
[14]SHEN H,DUAN Z S,LI F.The Evaluation About Vibratory Mixing Methods[J].Applied Mechanics and Materials,2012,217-219:2678-2682.
[15]李汝凯,洛桑慈成,王火明,等.振动搅拌水泥稳定砂砾强度性能对比研究[J].重庆交通大学学报:自然科学版,2017,36(11):33-36.LI Ru-kai,LUOSANG Ci-cheng,WANG Huo-ming,et al.Comparative Study on Strength Performance of Cement Stabilized Gravel Mix Under Vibration Stirring[J].Joural of Chongqing Jiaotong University:Natural Science Edition,2017,36(11):33-36.
[16]冯忠绪.混凝土搅拌理论与设备[M].北京:人民交通出版社,2001.FENG Zhong-xu.Concrete Mixing Theory and Equipment[M].Beijing:China Communications Press,2001.
[17]付昌会,冯忠绪,张磊.搅拌方式对混凝土含气量及孔结构的影响[J].郑州大学学报:工学版,2011,32(2):42-45.FU Chang-hui,FENG Zhong-xu,ZHANG Lei.Effects of Mixing Method on Concrete Air Content and Pore Distribution[J].Journal of Zhengzhou University:Engineering Science Edition,2011,32(2):42-45.
[18]赵利军,翁军良,冯忠绪.引气及搅拌作用对混凝土性能的影响[J].建筑科学与工程学报,2013,30(1):32-37.ZHAO Li-jun,WENG Jun-liang,FENG Zhong-xu.Effects of Air Entraining and Mixing on Concrete Performance[J].Journal of Architecture and Civil Engineering,2013,30(1):32-37.
[19]赵利军,杜占领,冯忠绪.新型振动搅拌装置的试验研究[J].中国公路学报,2005,18(2):120-122.ZHAO Li-jun,DU Zhan-ling,FENG Zhong-xu.Experimental Research on New Vibratory Mixer[J].China Journal of Highway and Transport,2005,18(2):120-122.
[20]韩恒梅,李军.水泥稳定碎石路面基层的强度性能试验研究[J].筑路机械与施工机械化,2016,33(10):41-45.HAN Heng-mei,LI Jun.Experimental Study on Strength Properties of Cement Stabilized Aggregate Base[J].Road Machinery&Construction Mechanization,2016,33(10):41-45.
[21]张振兴,张良奇.振动搅拌技术在路面水稳基层施工中的应用[J].筑路机械与施工机械化,2016,33(6):31-36.ZHANG Zhen-xing,ZHANG Liang-qi.Application of Vibratory Mixing Technology in Construction of Cement-stabilized Base Course[J].Road Machinery&Construction Mechanization,2016,33(6):31-36.
[22]赵悟,王博,赵利军,等.改善搅拌过程提高混凝土强度[J].长安大学学报:自然科学版,2015,35(1):148-153.ZHAO Wu,WANG Bo,ZHAO Li-jun,et al.Improving Concrete Strength Based on the Mixing Process[J].Journal of Chang’an University:Natural Science Edition,2015,35(1):148-153.
[23]冯忠绪,王卫中.增强混凝土界面粘结强度的方法[J].长安大学学报:自然科学版,2009,29(1):91-94.FENG Zhong-xu,WANG Wei-zhong.Reinforcement Methods of Concrete Interfacial Bond Strength[J].Journal of Chang’an University:Natural Science Edition,2009,29(1):91-94.
[24]胡龙泉,蒋应军,陈忠达,等.骨架密实型水泥稳定碎石路用性能[J].交通运输工程学报,2001,1(4):37-40.HU Long-quan,JIANG Ying-jun,CHEN Zhong-da,et al.Road Performance of Cement Stabilized Aggregate of Dense Framework Structure[J].Journal of Traffic and Transportation Engineering,2001,1(4):37-40.
[25]张良奇,冯忠绪.混凝土搅拌过程及其评价[J].长安大学学报:自然科学版,2011,31(2):101-105.ZHANG Liang-qi,FENG Zhong-xu.Process of Concrete Mixing and Its Evaluation[J].Journal of Chang’an University:Natural Science Edition,2011,31(2):101-105.