混凝土表层区域特征及耐久性研究进展
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摘要
阐述了混凝土近表层区域特性及其与混凝土内部间的异同,总结了国内外在混凝土表层区域特性、微细观结构损伤和劣化机理及过程等方面研究成果。分析表明,混凝土表层区域明显有别与混凝土内部本体,主要体现为组成、微观结构和性能等方面。然而,现有研究多忽视混凝土表层区域特性且将其等同于混凝土内部本体,从而导致混凝土耐久性预测结果与实际情况偏差较大。此外,有关混凝土耐久性研究还应考虑混凝土表层区域的环境荷载效应和离子传输机理及模式等。
The similarities and differences between concrete surface cover and internal body were elaborated.Simultaneously,the research achievements of concrete surface cover,including surface characteristic,micro structure,deterioration mechanism,were concluded.The results manifest that there are plenty of similarities and differences between surface cover and internal body of concrete.However,the existing researches mostly regard the both as the same,which results the predicting outcomes of concrete durablity diverging the real facts.Moreover,the environmental load effect and medium transmission mechanism need to be investigated in more detail.
The similarities and differences between concrete surface cover and internal body were elaborated.Simultaneously,the research achievements of concrete surface cover,including surface characteristic,micro structure,deterioration mechanism,were concluded.The results manifest that there are plenty of similarities and differences between surface cover and internal body of concrete.However,the existing researches mostly regard the both as the same,which results the predicting outcomes of concrete durablity diverging the real facts.Moreover,the environmental load effect and medium transmission mechanism need to be investigated in more detail.
引文
[1]王强,石梦晓.养护方式对混凝土表层渗透性的影响[J].清华大学学报,2015,55(2):150-155.
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[12]朱方之,赵铁军,张鹏,等.冻融后表层混凝土的孔结构劣化与损伤特性研究[J].公路,2011(12):1-5.
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[14]姜福香,万小梅,赵铁军,等.轴拉荷载作用下混凝土耐久性损伤及自愈合机理研究[J].混凝土,2011(9):8-11.
[15]WANG X S,WU B S,WANG Q Y.Online SEM investigation of microcrack characteristics of concretes at various temperatures[J].Cement and Concrete Research,2005,35(7):1385-1390.
[16]曾强,李克非.冻融情况下降温速率对水泥基材料变形和损伤的影响[J].清华大学学报,2008,48(9):1390-1394.
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[19]MUCTEBA U.The influence of coarse aggregate type on mechanical properties of fly ash additive self-compacting concrete[J].Construction and Building Materials,2012,37(12):533-540.
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[24]HANS J,BERT B,JAN C.Conservative modeling of the moisture and heat transfer in building components under atmospheric excitation[J].International Journal of Heat and Mass Transfer,2007,50(5):1128-1140.
[25]李春秋.干湿交替下表层混凝土中水分与离子传输过程研究[D].北京:清华大学,2009.
[26]NILSSON L O.Long-term moisture transport in high performance concrete[J].Materials and Structures,2002,35(10):641-649.
[27]金伟良,鄢飞,张亮.考虑混凝土碳化规律的钢筋锈蚀率预测模型[J].浙江大学学报,2000,34(2):158-166.
[28]李荣涛,李锡夔.混凝土中化学-热-湿-力耦合过程的数值方法[J].力学学报,2006,38(4):471-479.
[29]SAITO M,ISHIMORI H.Chloride permeability of concrete under static and repeated compressive loadings[J].Cement and Concrete Research,1995,25(4):803-808.
[30]牛荻涛,肖前慧.混凝土冻融损伤特性分析及寿命预测[J].西安建筑科技大学学报,2010,42(3):319-328.
[31]梅迎军,李志勇,梁乃兴,等.水-温-荷耦合作用下沥青混凝土疲劳寿命[J].湖南大学学报,2011,38(2):13-18.
[32]邢锋,冷发光,冯乃谦,等.长期持续荷载对素混凝土氯离子渗透性的影响[J].混凝土,2004(5):3-8.
[2]刘鹏.人工模拟和自然氯盐环境下混凝土氯盐侵蚀相似性研究[D].长沙:中南大学,2013.
[3]杨海波,周建生.混凝土温度裂缝的成因及防治[J].科学技术与工程,2007,7(20):5434-5437.
[4]BODDY A,BENTZ E,THOMAS M D A,et al.An overview and sensitivity study of a multi-mechanistic chloride transport model[J].Cement and Concrete Research,1999,29(6):827-837.
[5]BITRAF M,MOHAMMADI S.Analysis of chloride diffusion in concrete structures for prediction of initiation time of corrosion using a new meshless approach[J].Construction and Building Materials,2008,22(4):546-556.
[6]BE95-1347 DuraCrete:Rapid chloride migration method(RCM),compliance testing for probabilistic design purposes[S].The European Union-Brite EuRam III,1999.
[7]TANG L,NILSSON L O.Service life prediction for concrete structures under seawater by a numerical approach[J].Durability of Building Materials and Components,1996,7(1):97-106.
[8]黄河,杨华彬,危文爽,等.温度突降条件下大体积混凝土表层温度计算[J].武汉大学学报,2004,37(5):58-63.
[9]刘军,谢友均,邢锋,等.氯离子对粉煤灰混凝土表层渗透性的影响[J].中南大学学报,2014,45(11):4000-4005.
[10]郭晔,吴佳晔,黄新.基于Hertz接触理论的混凝土表层性能的检测方法[J].混凝土,2008(1):49-52.
[11]杨永敢,张云升,杨林,等.高性能混凝土表层硬度与强度的相关性[J].东南大学学报,2016,46(3):599-606.
[12]朱方之,赵铁军,张鹏,等.冻融后表层混凝土的孔结构劣化与损伤特性研究[J].公路,2011(12):1-5.
[13]LIU P,CHEN Y,GUO F Q,et al.Study on the distribution of coarse aggregate in concrete[C].10th Asia Pacific Transportation Development Conference,2014:663-70.
[14]姜福香,万小梅,赵铁军,等.轴拉荷载作用下混凝土耐久性损伤及自愈合机理研究[J].混凝土,2011(9):8-11.
[15]WANG X S,WU B S,WANG Q Y.Online SEM investigation of microcrack characteristics of concretes at various temperatures[J].Cement and Concrete Research,2005,35(7):1385-1390.
[16]曾强,李克非.冻融情况下降温速率对水泥基材料变形和损伤的影响[J].清华大学学报,2008,48(9):1390-1394.
[17]OSTOJA S M.Damage in a random microstructure:size effects,fractals and entropy maximization[J].Applied Mechanics Reviews,1989,42(11):5202-5212.
[18]THOMPSON A H,KATZ A J,KROHN C E.The microgeometry and transport properties of sedimentary rock[J].Advances in Physics,1987,36(5):625-629.
[19]MUCTEBA U.The influence of coarse aggregate type on mechanical properties of fly ash additive self-compacting concrete[J].Construction and Building Materials,2012,37(12):533-540.
[20]徐晓鹏,彭瑞东,谢和平,等.基于SEM图像分维估算的脆性材料细观结构演化方法研究[J].岩石力学与工程学报,2004,2(21):3600-3603.
[21]HASSANI B,HINTON E.A review of homogenization and topology optim izmion II-analytical and numerical solution of homogenization equations[J].Computers and Structures,1998,69(6):719-738.
[22]ANDRADE C,SARRIA J,ALONSO C.Relative humidity in the interior of concrete exposed to natural and artificial weathering[J].Cement and Concrete Research,1999,29(8):1249-1259.
[23]王补宣,方肇洪.含湿毛细多孔体介质的传热与传质和热湿迁移特性测定方法的探讨[J].工程热物理学报,1985,6(1):60-62.
[24]HANS J,BERT B,JAN C.Conservative modeling of the moisture and heat transfer in building components under atmospheric excitation[J].International Journal of Heat and Mass Transfer,2007,50(5):1128-1140.
[25]李春秋.干湿交替下表层混凝土中水分与离子传输过程研究[D].北京:清华大学,2009.
[26]NILSSON L O.Long-term moisture transport in high performance concrete[J].Materials and Structures,2002,35(10):641-649.
[27]金伟良,鄢飞,张亮.考虑混凝土碳化规律的钢筋锈蚀率预测模型[J].浙江大学学报,2000,34(2):158-166.
[28]李荣涛,李锡夔.混凝土中化学-热-湿-力耦合过程的数值方法[J].力学学报,2006,38(4):471-479.
[29]SAITO M,ISHIMORI H.Chloride permeability of concrete under static and repeated compressive loadings[J].Cement and Concrete Research,1995,25(4):803-808.
[30]牛荻涛,肖前慧.混凝土冻融损伤特性分析及寿命预测[J].西安建筑科技大学学报,2010,42(3):319-328.
[31]梅迎军,李志勇,梁乃兴,等.水-温-荷耦合作用下沥青混凝土疲劳寿命[J].湖南大学学报,2011,38(2):13-18.
[32]邢锋,冷发光,冯乃谦,等.长期持续荷载对素混凝土氯离子渗透性的影响[J].混凝土,2004(5):3-8.