SELF-DESICCATION SHRINKAGE IN LOW POROSITY CEMENT-SILICA MORTAR . NORDIC CONCRETE RESEARCH. PUBLICATION NO 8

It is a well known fact that the hydration reactions of sealed portland cement paste with a low w/c-ratio may cause various self-desiccation phenomena. Above a certain degree of hydration the chemical reactions are accompanied by: (1) a decrease in the internal relative humidity in the cement paste; and (2) a volume shrinkage of the cement paste matrix. This paper presents the results from a laboratory investigation of self-desiccation shrinkage mechanisms in hardening low porosity fibre-reinforced cement-silica mortar. The experimental work carried out included measurements of: (a) the isothermal selfdesiccation shrinkage of sealed specimens; (b) the coefficient of thermal expansion at different hardening ages; and (c) the thermal activation energy of self-desiccation shrinkage. Parameterization of shrinkage curves has been carried out, using the Dispersion Model, suggested by T Knudsen, in a paper entitled 'The dispersion model for hydration of Portland cement' published in Cement and Concrete Research vol 14 1984. For the covering abstract see IRRD 828653.

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  • Corporate Authors:

    NORDIC CONCRETE FEDERATION

    KRONPRINSENSGT 17
    Oslo 2,   Norway 
  • Authors:
    • Hansen, P F
    • Jensen, O M
  • Publication Date: 1989-12

Language

  • English

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Filing Info

  • Accession Number: 00604978
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Feb 28 1991 12:00AM