Dynamic mechanical thermo-analysis of Portland cement paste hydrated for 45 years

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• 作者：P. Pourbeik ; J. J. Beaudoin ; R. Alizadeh ; L. Raki
• 关键词：Dynamic mechanical thermo ; analysis ; Old cement paste ; Ageing effects ; Structural models ; Porosity
• 刊名：Materials and Structures
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：49
• 期：1-2
• 页码：329-340
• 全文大小：1,500 KB
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  11.Viehland D, Li J-F, Yuan L-J, Xu Z (1996) Microstructure of calcium silicate hydrate (C–S–H) gels in Portland cement paste: short-range ordering, nanocrystallinity and local compositional order. J Am Ceram Soc 79(7):1731–1744CrossRef
  12.Chen JJ, Sorelli L, Vandamme M, Ulm F-J, Chanvillard G (2010) Coupled grid-indentation/SEM–EDX study on low water/cement ratio Portland cement paste: evidence for C–S–H nanocomposites. J Am Ceram Soc 93(5):1484–1493
  13.Soroka I, Sereda PJ (1968) The structure of cement–stone and use of compacts as structural models. In: Proceedings of 5th international symposium on the chemistry of cement, vol. 3, Tokyo, pp 67–73
  14.Feldman RF (1972) Factors affecting the Young’s modulus-porosity relation of hydrated Portland cement compacts. Cem Concr Res 2(4):375–386CrossRef
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  16.Beaudoin JJ (1983) Comparison of mechanical properties of compacted calcium hydroxide and Portland cement paste systems. Cem Concr Res 13:319–324CrossRef
  17.Sereda PJ, Feldman RF, Swenson EG (1966) Effect of sorbed water on some mechanical properties of hydrated Portland cement pastes and compacts, Highway Research Board, Special Report 90, pp 58–73
  18.Menard KP (1999) Dynamic mechanical analysis—a practical introduction. CRC Press LLC, Boca RatonCrossRef
  19.Alizadeh R, Beaudoin JJ, Raki L (2011) Mechanical properties of calcium silicate. Mater Struct 44:13–28CrossRef
  20.Alizadeh R (2009) Nanostructure and engineering properties of basic and modified calcium–silicate–hydrate systems, PhD thesis, Department of Civil Engineering, University of Ottawa, pp 231
  21.Pourbeik P, Alizadeh R, Beaudoin JJ, Nguyen D-T, Raki L (2013) Microindentation creep of 45 year old hydrated Portland cement paste. Adv Cem Res 25(5):301–306. doi:10.​1680/​adcr.​12.​00058 CrossRef
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• 作者单位：P. Pourbeik (1)
  J. J. Beaudoin (1)
  R. Alizadeh (2)
  L. Raki (1)
  
  1. National Research Council Canada, Construction Portfolio, 1200 Montreal Rd., Ottawa, ON, K1A 0R6, Canada
  2. Giatec Scientific Inc., Ottawa, ON, Canada
  
• 刊物类别：Engineering
• 刊物主题：Structural Mechanics
  Theoretical and Applied Mechanics
  Mechanical Engineering
  Operating Procedures and Materials Treatment
  Civil Engineering
  Building Materials
  
• 出版者：Springer Netherlands
• ISSN：1871-6873

文摘

The effect of prolonged hydration of Portland cement paste on engineering behavior was investigated using dynamic mechanical thermo-analysis (DMTA) methods. Specimens ranged in age from 3 days to 45 years. Compacts of hydrated cement powders and normally hydrated paste specimens were tested. Age dependent nanostructural characteristics of C–S–H were shown to influence the mechanical response of cement paste. Evidence was provided to support the use of compacts as structural models for hydrated cement paste. Details of ageing effects on the DMTA parameters (storage modulus and internal friction) as a function of temperature and porosity are reported.