Directed cracking in concrete panel manufacture

Details Directed cracking in concrete panel manufacture Directed cracking in concrete panel manufacture

1981-03-02

1983-11-22

Parrish, John A.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Forming continuous work followed by cutting

264160, 264333, B28D 126

Patent

active

044168420

ABSTRACT:
A method of manufacture in which the formation of unsightly stress cracks in sandwich-like panels of prestressed concrete are prevented by the formation of a "contraction joint" at selected locations in the panel's outer layer of concrete during its manufacture.

REFERENCES:
patent: 3050810 (1962-08-01), Lindbloom
patent: 4176572 (1979-12-01), Pennington
patent: 4186166 (1980-01-01), Hight
patent: 4213550 (1980-07-01), Bonoddio
patent: 4340557 (1982-07-01), Groso

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