Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Patent
1995-01-27
1997-11-25
Macantoni, Paul
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
106738, 106742, 106752, 106817, 106820, 264333, 264 43, C04B 2206
Patent
active
056907290
ABSTRACT:
A method of reinforcing cement/concrete mixtures with alkali-intolerant reinforcements and/or aggregate, such as uncoated, common glass filament, plastic filament, fabric and roving made therefrom by reducing the pH of the mixture while in its plastic state, and/or after it has set and cured, to about 7. With a neutral pH, the alkali-intolerant reinforcements need not be coated to protect them from degradation. In the absence of alkalinity, the reinforcement and/or aggregate material bonds with the cement mixture to form a relatively stronger mixture, which can be shaped as desired, made part of permanently poured structures, cement boards and many other small and large products. By selecting appropriate and, if desired, different materials for the reinforcements and/or aggregate, the strength, flexibility, etc. characteristics of the product can be readily changed to adapt the product to the intended use. The pH is reduced by migrating such materials as CO.sub.2 and/or CO and O.sub.3 into the cement after it has cured and, if desirable, also during curing. The CO.sub.2 and/or CO and O.sub.3 for the chemical reactions to reduce the pH are most suitably obtained from flue gases of independent combustion processes which would otherwise be discharged as atmospheric pollutants.
REFERENCES:
patent: 4069063 (1978-01-01), Ball
patent: 5043020 (1991-08-01), Lerke et al.
patent: 5307876 (1994-05-01), Cavan
patent: 5358676 (1994-10-01), Jennings et al.
Concrete Technology and Practice Taylor (1965) pp. 439-441.
Japan Patent Abstract--"Production of High Strength Cured Cement Material Utilizing Carbonation Reaction" Suzuki et al. JP 06-263562 (Sep. 20, 1994).
Japan Patent Abstract "Production of High Oil Resistant Cement Hardened Body" Suzuki et al. JP 06-10749 (Apr. 19, 1994).
Japan Patent Abstract "Mineral Aggregate Resistant to Reacton with Base & Method for Suppressing Base-Aggregate Reacton" Tsuyuki et al. JP 04-74740 (Mar. 10, 1992).
"Environmental Protection for Concrete", Stanfield Pigment & Resin Technology (United Kingdom) (1987) 16, (10) 8-13 See Abstract.
"Study of the Endogeneous Carbonation of Concrete and of its Application to the Precast Concrete Industry" Estoup et al. Thesis--Univ. of Paris (1987)--See Abstract--.
"Plasma Treated Ultra High Strength Polyethylene Fibers Improved Fracture Toughness of Polymethymethacrafatic" Hild et al. J. of Mat'ls Science V4 N5 (1993).
Cement and Concrete Research, Perez-Pena, M., et al. (1994), "Mechanical Properties of Fiber Reinforced Lightweight Concrete Composites", pp. 1121-1132.
Cement and Concrete Research, Wang, Shao-Dong, et al. (1994), "Factors Affecting the Strength of Alkali-Activated Slag", pp. 1033-1043.
Magazine of Concrete Research, Loo, Y.H., et al. (1994), "A carbonation prediction model for accelerated carbonation testing of concrete", pp. 191-200.
American Concrete Institute, Bentur, A. (1990), "Improvement of the Durability of GFRC by Silica Fume Treatments", pp. 215-222, 225-231.
American Concrete Institute (1989), "Cold Weather Concreting", pp. 306R-1, 4, 19.
Concrete Technology and Design, Swamy, R.N. (1988), "Natural Fibre Reinforced Cement and Concrete", pp. 170-172.
Prestressed Concrete Institute (1987), "Recommended Practice for Glass Fiber Reinforced Concrete Panels", Ch. 3, p. 8, Ch. 1, p. 1.
Manual fo Concrete Practice, ACI Committee 544 (1986), "State-of-the-Art Report on Fiber Reinforced Concrete", pp. 544.1R-1-22.
Swedish Cement and Concrete Research Institute, Gram, H-E (1983), "Durability of natural fibres in concrete", pp. 98-131, 174-181.
American Concrete Institute, An International Symposium: Fiber Reinforced Concrete (1974), article entitled "Some Properties of Glass Fiber Reinforced Concrete", pp. 93-111.
Americna Concrete Institute, An International Symposium: Fiber Reinforced Concrete (1974), article entitled "Glass Fiber Reinforced Cement Base Materials", pp. 248-264.
American Concrete Institute, an International Symposium: Fiber Reinforced Concrete (1974), article entitled "Glass Fiber Reinforned Cement Base Materials", pp. 350-362.
Taylor, W.H. (1965), "Concrete Technology and Practice", pp. 178-180, Ch. 10, p.1.
Macantoni Paul
Materials Technology Limited
LandOfFree
Cement mixtures with alkali-intolerant matter and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cement mixtures with alkali-intolerant matter and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cement mixtures with alkali-intolerant matter and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2103059