Abstract
Nine different fly ashes have been used in a study of autoclaved (216° C) cement-fly ash mixtures containing 50% fly ash (by weight). Paste samples for each fly ash were prepared at water-solid ratios of 0.22 to 0.45 and mechanical property-porosity relations were determined. The autoclaved products were characterized by several techniques. Linear correlations with a composition term, C/(S + A)−kF, were obtained for logarithms of zero-porosity modulus of elasticity and microhardness values. A linear correlation for modulus of elasticity of the porous solid and the composition term, 2 - C/S + A−kF, was also obtained for each water-solid ratio. Correlations for microhardness of the porous solid with a composition term, 2−C/S + A are reported, a different curve for each water-solid ratio. Impregnation of the porous products resulted in increased values for modulus of elasticity and microhardness and provided an alternate means of estimating zero-porosity values of these properties.
Similar content being viewed by others
References
E. E. Berry, CANMET Report 76-25 (1976) p. 60.
R. C. Valore, Laboratory evaluation of fly ash and other pozzolans for use in concrete products, Proceedings, Second Ash Utilization Symposium, Pittsburgh (US Department of the Interior, Washington DC, 1970) p. 171.
F. Massazza,I1 Cemento 1 (1976) 3.
J. J. Beaudoin andR. F. Feldman,Cem. Concr. Res. 5 (1975) 103.
Z. Sauman, Study of reactions between CaO or 3CaO-SiO2 andβ-2CaO-SiO2 and power station fly ashes under hydrothermal conditions, Fifth International Symposium on the Chemistry of Cement, Tokyo, Paper IV-17 (Cement Association of Japan, Tokyo, 1968) p. 122.
R. F. Feldman andJ. J. Beaudoin, Structure and properties of porous cement systems and their modification by impregnants, Proceedings, Conference on Hydraulic Cement Pastes: Their Structure and Properties, Sheffield (Cement and Concrete Association, Wexham Springs, Slough, 1976) p. 150.
R. F. Feldman,Cem. Concr. Res. 4 (1973) 1.
Idem, ibid. 1 (1971) 285.
Idem, Cement Technol. 3 (1972) 5.
P. J. Sereda, R. F. Feldman andE. G. Swenson, Effect of sorbed water on some mechanical properties of hydrated Portland cement pastes and compacts, Highway Research Board, Washington, Special Report 90 (1966) p. 58.
J. J. Beaudoin andP. J. Sereda,Powder Technol. 13 (1976) 49.
J. M. Crennan, S. A. S. El-Hemaly andH. F. W. Taylor,Cem. Concr. Res. 7 (1977) 493.
R. F. Feldman andJ. J. Beaudoin,ibid. 8 (1978) 273.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Beaudoin, J.J., Feldman, R.F. Partial replacement of cement by fly ash in autoclaved products — theory and practice. J Mater Sci 14, 1681–1693 (1979). https://doi.org/10.1007/BF00569291
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00569291