METHOD FOR PRODUCING CHEMICALLY PRESTRESSED CONCRETE PRODUCT, HIGH-TEMPERATURE, HIGH-PRESSURE UNDERWATER CONCRETE PRODUCT CURING DEVICE SUITABLY USED FOR THE METHOD AND CURING METHOD FOR CONCRETE PRODUCT USING THE CURING DEVICE

Title:

Document Type and Number:

WIPO Patent Application WO/1999/062843

Kind Code:

A1

Abstract:

A method for producing a high-strength concrete product large in chemically prestressed quantity and small in loss by the prestress, a high-temperature, high-pressure underwater concrete product curing device excellent in energy/production efficiency and safety and reusing curing water, and a curing method for the concrete product. The method for producing a chemically prestressed concrete product comprising molding concrete in which a cement component containing cement and expansive admixture is mixed and curing the molded concrete underwater at temperatures higher than 100 °C. The curing device provided with a plurality of pressure containers (4A, 4B), each pressure container having a curing water supply means (6), a compressed air supply means (8), a heater (12) and a deaeration means (10), and with high-temperature, high-pressure water transfer pipes (16A, 16B) installed below relative containers and communicating with non-relative containers, each pressure container being connected to each other by the transfer pipes soas to form a circulating path, wherein curing water immediately after curing is gradually transferred, using a high pressure in one pressure container, to the other pressure container on standby at atmospheric pressure and is used repeatedly.

Inventors:

TAZAWA EIICHI (JP)
HORI AKIHIRO (JP)

Application Number:

PCT/JP1999/002997

Publication Date:

December 09, 1999

Filing Date:

June 04, 1999

Export Citation:

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Assignee:

DENKI KAGAKU KOGYO KK (JP)
TAZAWA EIICHI (JP)
HORI AKIHIRO (JP)

International Classes:

B28B11/24; C04B40/02; (IPC1-7): C04B40/00; B28B11/00

Foreign References:

JPS5132644B1	1976-09-14
JPS4414834B1	1969-07-02
JPH02307877A	1990-12-21

Other References: