Process for manufacturing a lightweight aggregate

Details Process for manufacturing a lightweight aggregate Process for manufacturing a lightweight aggregate

1986-10-06

1988-09-13

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

264117, 264118, 264234, 264345, 264DIG35, 264DIG49, 106118, 106120, 106DIG1, C04B 1802, C04B 4002

Patent

active

047708310

ABSTRACT:
Lightweight aggregate for use in the building industry is produced by pelletizing or granulating pulverized fuel ash or other siliceous material with a binder comprising lime in an amount less than 5% by weight based on the weight of the mixture of lime and siliceous material and curing the pellets or granules at a temperature within the range of from 35.degree. C. to 100.degree. C. in an atmosphere saturated with water vapor. The amount of lime added as binder is preferably within the range of from 1 to 4.5% by weight and curing temperature is preferably within the range of from 50.degree. to 85.degree. C. Preferably the pelletizing process is also carried out at an elevated temperature within the range of from 35.degree. C. to 100.degree. C.

REFERENCES:
patent: 2564690 (1951-08-01), Havelin et al.
patent: 3192060 (1965-06-01), Tilsen
patent: 3854968 (1974-12-01), Minnick et al.
patent: 4018619 (1977-04-01), Webster et al.
patent: 4105463 (1978-08-01), Angelbeck
patent: 4313762 (1982-02-01), Pound
patent: 4377414 (1983-03-01), Buschmann
patent: 4490178 (1984-12-01), Loggers et al.
Chemical Abstracts, vol. 92, No. 6, 2/80, Abstract No. 46437a.

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