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Surface Area and Pore Structure of Low-Porosity Cement Pastes

  • R. Sh. Mikhail
  • S. A. Abo-El-Enein
  • G. A. Oweimreen

Abstract

Low-porosity portland cement pastes were prepared by two methods; by reducing the water/cement ratio to 0.23 and by prehydration compression at 5, 10, 30 and 70 atmospheres3 followed by hydration in liquid water at 25° C for about two years. The thickness of the produced tobermorite sheets was found to differ in the two methods of preparation3 and for the pressed samples to depend on the pressure used in the pre-hydration compression. Changes in the degrees of hydration3 specific surface areas3 and pore structures are reflected in the compressive strength values measured for the various pastes3 and possible interpretations are offered.

Keywords

Compressive Strength Cement Paste Cement Content Layer Sheet Harden Cement Paste 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    M. Yudenfruend, I. Odler, S. Brunauer, Cement and Concrete Research 2 313 (1972), and refs. cited there.Google Scholar
  2. 2.
    M. Yudenfruend, I. Skalny, R.Sh. Mikhail, S. Brunauer, Cement and Concrete Res. 2 331 (1972).Google Scholar
  3. 3.
    E.W. Roberts, L.F.W. Leese, Patent Spec. No. 181, 745, London Patent Office (21 March 1921 ).Google Scholar
  4. 4.
    E. Freyssinet, Concrete and Constructional Engineering 31 209 (1936); Patent Spec. No. 431 (9 July 1935), and Patent Spec. No. 453–555 ( 14 Sept. 1936 ), London Patent Office.Google Scholar
  5. 5.
    Svenska Enterprenad Aktiebologet Sentab-London, Patent Spec. No. 906, 573 ( 26 Sept. 1962 ) London Patent Office.Google Scholar
  6. 6.
    T. Kluz, F. Leconner, Insynieria i Budownictwo 117 204 (1960).Google Scholar
  7. 7.
    G. Wischers, Schriftenreihe der Zementiridustrie 28 117 (1961).Google Scholar
  8. 8.
    C.D. Larence, Cement and Concrete Association Research Report 19, p. 21 (1969).Google Scholar
  9. 9.
    T.C. Powers, T.L. Brownyard, Res. Lab. Portl and Cement Assoc. Bull. 22 (1948).Google Scholar
  10. 10.
    I. Odler, J. Hagymassy, M. Yudenfruend, K.M. Hanna, S. Brunauer, J. Colloid Interface Sci. 38 265 (1972).Google Scholar
  11. 11.
    R. Sh. Mikhail, S.A. Abo-El-Enein, Cement and Concrete Res. 2: 401 (1972).CrossRefGoogle Scholar
  12. 12.
    E.E. Pressler, S. Brunauer, D.L. Kantro, C. Weise, Anal. Chem. 33 877 (1961).Google Scholar
  13. 13.
    L.E, Copeland, D.L. Kantro, G. Verbeck, Proc. of the 4th Int. Symp. on Chem. of Cement, Wash. 1960-NBS Monog. 43 I 429.Google Scholar
  14. 14.
    I.W. McBain, A.M. Baker, J. Am. Chem. Soc. 48 690 (1926).Google Scholar
  15. 15.
    R. Sh. Mikhail, L.E. Copeland, S. Brunauer, Canadian J. Chem. 42 426 (1964).Google Scholar
  16. S. Brunauer, S.A. Greenberg, 4th Int. Symp. on Chem. of Cement, Wash. 1960, NRS Monog. 43 3 149-50.Google Scholar
  17. 17.
    R. Sh. Mikhail, S. Brunauer, E.E. Bodor, J. Colloid Interface Sci. 26 45 (1968).Google Scholar
  18. 18.
    S. Brunauer, R. Sh. Mikhail, E.E. Bodor, J. Colloid Interface Sci. 24 451 (1967).Google Scholar
  19. 20.
    S. Brunauer, private communication.Google Scholar
  20. 21.
    A.A. Griffith, Phil. Trans. R. Soc. A221 163 (1920).Google Scholar

Copyright information

© Plenum Press, New York 1974

Authors and Affiliations

  • R. Sh. Mikhail
    • 1
    • 2
  • S. A. Abo-El-Enein
    • 1
    • 2
  • G. A. Oweimreen
    • 1
    • 2
  1. 1.Department of Chemistry, Faculty of ScienceAin Shams UniversityCairoEgypt
  2. 2.Department of Materials Engineering and Physical SciencesThe American University in CairoEgypt

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