Method for manufacturing light-weight shaped concrete articles,

Details Method for manufacturing light-weight shaped concrete articles, Method for manufacturing light-weight shaped concrete articles,

1984-03-30

1985-10-15

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264109, 264DIG7, B28B 300, B28C 520

Patent

active

045473315

ABSTRACT:
Loose, substantially sphere-shaped particles of a foamed plastic material, e.g., polystyrene, are blended with a binder consisting of a solution of 75-85% by weight of coal-tar pitch having a ring and ball softening point of 50.degree.-65.degree. C. in 15-25% by weight of phenol-free coal-tar oil having a distillation range of 150.degree.-275.degree. C. and 20-35% by volume of an epoxy resin. The resulting sticky mass is then blended with dry cement to produce a mass of loose particles of foamed plastic material coated with a film of dry cement. A second portion of dry cement and sufficient water to harden the cement are added and the moist mixture is pressed into the desired shape.

REFERENCES:
patent: 3251916 (1966-05-01), Newnham et al.
patent: 3354099 (1967-11-01), Stegeman
patent: 3725315 (1973-04-01), Bauer
patent: 3764357 (1973-10-01), Bowles et al.
patent: 3836617 (1974-09-01), Lankheet

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