Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Patent
1995-06-07
1996-11-12
Bell, Mark L.
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
106735, 106736, 106772, 106709, 106DIG1, C04B 704, C04B 713, C04B 2804
Patent
active
055735886
ABSTRACT:
Class C fly ash containing cementitious mixtures for producing concretes that are resistant to sulfate-containing environments. Class C fly ash is intergound with portland cement clinker and gypsum to produce a cementitions mixture, which, when combined with water and an aggregate produces a hardened concrete that is resistant to sulfate environments. Alternatively, portland cement clinker and gypsum are first interground and the resultant mixture is admixed with Class C fly ash to produce a cementitious mixture. This cementitious mixture, in combination with water and an aggregate, produces a hardened concrete that has improved resistance to sulfate environments. In other aspects, a concrete that is stable in sulfate environments is produced by admixing portland cement, Class C fly ash and water containing a source of ions selected from the group consisting of sulfate and hydroxyl anions. The resultant concrete is capable of hardening in sulfate environments without the formation of such quantities of volume-expanding compositions in the hardened concrete as would cause the hardened concrete to undergo stress failure.
REFERENCES:
patent: 2837436 (1958-06-01), Chapman, Jr. et al.
patent: 3565648 (1971-02-01), Mori et al.
patent: 3782985 (1974-01-01), Gebhardt
patent: 4240952 (1980-12-01), Hulbert et al.
patent: 4306912 (1981-12-01), Forss
patent: 4419136 (1983-12-01), Rice
patent: 4470850 (1984-09-01), Bloss
patent: 4715896 (1987-12-01), Berry
patent: 4756761 (1988-07-01), Philip et al.
Kovach, R., "The Use of Thermal Power Station Pulverized Fuel Ash in the Manufacture of Cement in Hungary", Ankara Turkey Symposium, Nov. 1970.
Davis, R., et al., "Properties of Cements and Concretes Containing Fly Ash" Journal of the American Concrete Institute, vol. 33, May-Jun. 1937, pp. 577-612.
"Use of Fly Ash in Concrete", American Concrete Institute Committee 226 (1987)(no month).
Odler, I., "The Possibilities of Increasing SO.sub.3 Content in Cement", Proceedings: Advances in Cement Manufacture and Use, Engineering Foundation Conferences, Jul. 1988, pp. 303-310.
Hobbs, D. W., "The Influence of SO.sub.3 Content on the Behavior of Portland Cement Mortars", World Cement, vol. 8, No. 3, 1977, pp. 75-85 (no month).
Mehta, P. K., "Investigations on Energy Saving Cement", World Cement Technology, 1980, pp. 166-177 (no month).
Tezuka, Y., et al, "Hydration Characteristics and Properties of Mixtures of Cement and High Content of Calcium Sulfate", Proceedings of the 8th International Conference on Cement Chemistry, vol. III, 1986, pp. 323-329 (no month).
Marusin, S. L., "Microstructure of Fly Ash Concrete, Part I: Effects of Calcium Sulfite and Calcium Sulfate" (date unknown).
Lea, F. M. Section on "Supersulfated Cement", The Chemistry of Cement and Concrete, Chemical Publishing Company, Inc., 1970, pp. 481-485 (no month).
Byfors, K., et al., "Durability of Concrete Made with Alkali Activated Slag", Fly Ash, Silica Fume, Slag and Natural Pozzolans in Concrete, American Concrete Institute, SP-114, 1989, pp. 1429-1466 (no month).
Van Aardt, J. H. P. and Visser, S., "Influence of Alkali on the Sulfate Resistance of Ordinary Portland Cement Mortars", Cement and Concrete Research, vol. 15, 1985, pp. 485-494 (no month).
Malone, P. G., Randall, C. A., and Kirkpatrick, T., "Potential Applications of Alkali-Activated Alumino-Silicate Binders in Military Operations", Miscellaneous Paper GL-85-15, Geotechnical Laboratory, Waterways Experiment Station, 1985, pp. 1-39 (no month).
Talling, B. and Brandstetr, J., "Present State and Future of Alkali-Activated Slag Concretes", Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete, American Concrete Institute, SP-114, 1989, pp. 1519-1545 (no month).
Kosmatka et al. "Design & Control of Concrete Mixtures" Thirteenth Edition, PCA, 1988. pp 1,64,68,69,70,71,72. (no month).
Bell Mark L.
Board of Regents , The University of Texas System
Marcheschi Michael
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