Water Sorption and Dessiccation in a Portland Cement Paste: Positron Annihilation Results

• Authors: G. Consolati , G. Dotelli , F. Quasso
• Languages of publication: EN

Abstracts

EN

Positron annihilation experiments were carried out on a Portland cement paste one year aged, which was subjected to cycles of dessiccation and subsequent water resaturation, in order to study possible changes of the porosity. Analysis of the annihilation time spectra suggests that drying and rewetting treatments do not induce irreversible modifications in the configuration of the finest gel pores.

Keywords

EN

78.70.Bj; 71.60.+z; 81.05.Rm

Discipline

• 71.60.+z: Positron states(for positron annihilation, see 78.70.Bj)
• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 81.05.Rm: Porous materials; granular materials(for granular superconductors, see 74.81.Bd)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 99
• Issue: 3-4
• Pages: 345-349

Dates

published

2001-03/04

received

2000-09-18

Contributors

author

G. Consolati

• Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Politecnico di Milano, 20133 Milan, Italy

author

G. Dotelli

• Dipartimento di Chimica Industriale ed Ingegneria Chimica "G. Natta", Politecnico di Milano, 20133 Milan, Italy

author

F. Quasso

• Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Politecnico di Milano, 20133 Milan, Italy

References

• 1. K.J. Hung, C.C. Huang, D.C. Huang, P.K. Tseng, W.F. Huang, Mater. Sci. Forum, 255-257, 299, 1997
• 2. Y. Kobayashi, K. Takeuchi, Mater. Sci. Forum, 175-178, 703, 1995
• 3. K. Ciesielski, A.L. Dawidowicz, T. Goworek, B. Jasińska, J. Wawryszczuk, Chem. Phys. Lett., 289, 41, 1998
• 4. T. Rybka, C. Rybka, T. Goworek, R. Wasiewicz, J. Wawryszczuk, Cem. Concr. Res., 12, 747, 1982
• 5. R. Myllyla, M. Karras, Appl. Phys., 7, 303, 1975
• 6. I. Odler, in: Lea's Chemistry of Cement and Concrete, 4th ed., Ed. P.C. Hewlett, Arnold Publishers, London 1998, p. 241
• 7. B. Marchese, in: Advances in Cement Technology, Ed. S.N. Ghosh, Pergamon Press, Oxford 1983, p. 441
• 8. G. Consolati, G. Dotelli, F. Quasso, Mater. Sci. Eng. A, 262, 304, 1999
• 9. G. Consolati, G. Dotelli, F. Quasso, J. Appl. Phys., 86, 4225, 1999
• 10. G. Consolati, G. Dotelli, F. Quasso, Radiat. Phys. Chem., 58, 727, 2000
• 11. J.J. Thomas, H.M. Jennings, A.J. Allen, Concr. Sci. Eng., 1, 45, 1999
• 12. J. Kansy, Nucl. Instrum. Methods Phys. Res. A, 374, 235, 1996
• 13. C.D. Lawrence, in Ref. [6], p. 400
• 14. H. Koster, I. Odler, Cem. Concr. Res., 16, 207, 1986
• 15. I. Odler, H. Koster, Cem. Concr. Res., 16, 893, 1986
• 16. I. Odler, H. Koster, Cem. Concr. Res., 21, 975, 1991

Identifiers

DOI

10.12693/APhysPolA.99.345