Static structures (e.g. – buildings) – With component having discrete prestressing means – Beam – girder – or truss construction
Patent
1979-10-09
1981-12-22
Pavelko, Thomas P.
Static structures (e.g., buildings)
With component having discrete prestressing means
Beam, girder, or truss construction
5230912, 264 451, 264 51, 264228, 264DIG7, 428327, 428402, 428407, 4283124, 4283135, 4283191, 428446, B28B 2300, B28B 2304
Patent
active
043063950
ABSTRACT:
An improved lightweight cementitious product consisting essentially of an aqueous cementitious mixture and reclaimed polystyrene beads in which the reclaimed polystyrene beads are bonded to the cementitious material. The cementitious product is prepared by dispensing reclaimed polystyrene beads in an aqueous cementitious mixture, such as hydraulic cement and water, to form a resulting mixture, placing the resulting mixture in a mold, and compressing the resulting mixture in the mold until setting of the resulting composition occurs. The volume of the resulting mixture in the mold is reduced during compression by approximately fifteen percent of the original volume and substantially no water is exuded from the resulting mixture during compression. The reclaimed polystyrene beads are substantially spherical in configuration and have a particle size substantially larger than "virgin" polystyrene beads.
REFERENCES:
patent: 3247294 (1966-04-01), Sabouni
patent: 3338848 (1967-08-01), Hamilton
patent: 3492384 (1970-01-01), Motthews
patent: 3697366 (1972-10-01), Harlock
patent: 3867503 (1975-02-01), Shoe
patent: 3974024 (1976-08-01), Yano
patent: 4100242 (1978-07-01), Leach
The Chemistry of Cement & Concrete, F. M. Lea, Edward Arnold (Publishers) Ltd., London, 1956, pp. 339-340.
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