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IPC

(21) (22)

Application

98100835/03, 1998-01-22

(22)

Actual filing date

1998-01-22

(45)

Published

1999-07-10

(72)

Inventor

Rakhmanov V.A.Melikhov V.I.Devjatov V.V.Shumilin V.I.

(73)

Holder

Aoot Vserossijskij Federal'Nyj Golovnoj Tekhnologicheskij Institut Vniizhelezobeton

METHOD OF FABRICATING POLYSTYRENE-CONCRETE PRODUCTS Russian patent published in 1999 - IPC

Abstract RU 2132836 C1

FIELD: manufacture of building materials. SUBSTANCE: method of fabricating shaped polystyrene-concrete products consists in preparing and placing molding mixture (in the form of polystyrene foam granules with loose density 7 to 25 kg/cu.m) into heat-insulated mold with electrodes, and heating mixture by industrial-frequency current to 50-65 C with rate 0.002-0.008 C/s. Voltage gradient is maintained between 80 and 280 V/m in current direction. When voltage is switched off, mold with product is kept for 8-20 hr before dismantling. Cavities in product are formed by electrically driven emptiness-formers made from material with resistivity lower than that of polystyrene-concrete mixture. EFFECT: reduced production expenses and increased volume homogeneity of physico-mechanical characteristics. 2 cl, 1 dwg, 1 tbl

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RU 2 132 836 C1

Authors

Rakhmanov V.A.

Melikhov V.I.

Devjatov V.V.

Shumilin V.I.

Dates

1999-07-10—Published

1998-01-22—Filed

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