Process for forming a light-weight aggregate
AssigneeResource Technology, Inc.
InventorRobert W. Styron
Life of this patent
Estimating the term…
Abstract
A process is disclosed for forming lightweight aggregate pellets having a density of less than about 60 lbs./ft..sup.2. The first step of the process is to form an admixture which includes fly ash, cement and filler. By weight percent of the admixture formed, the admixture includes greater than 60% fly ash, 1-25% cement and 1-10% filler. Water and a chemical accelerator are added to the admixture in a pelletizing device. By weight percent of the aggregate formed, about 1 to 18% water is added and between about 0 and 3% chemical accelerator is added by weight of the cement used in the admixture. The aggregate pellets are then removed from the pelletizing device and cured with an oxygen containing gas, such as air, at a temperature of less than about 300.degree. F.
Claims20
A process for forming light-weight aggregate pellets having a density of less than about 60 lbs./ft..sup.3 comprising:
- (a) forming an admixture comprising, by weight-percent of said admixture, about
- greater than 60% fly ash,
- 1 to 25% cement, and
- 1 to 10% filler selected from the group consisting of cenospheres, silica fume dust, and perlite,
- (b) in a pelletizing device, adding to said admixture, by weight percent of the total aggregate, about
- 1to 18% water, and
- 0 to 3% (by weight of the cement percent) chemical accelerator to form aggregate pellets of a predetermined size range,
- (c) removing said aggregate pellets from said pelletizing device, and
- (d) curing said aggregate pellets with an oxygen containing gas at a temperature less than about 300.degree. F.
A process for forming lightweight aggregate pellets having a density of less than about 60 lbs./ft..sup.3 comprising:
- (a) forming an admixture comprising greater than 60 parts fly ash, 1 to 25 parts cement, and 1 to 10 parts of a silica fume dust filler,
- (b) in a pelletizing device, adding to said admixture about
- 1 to 18 parts water, and
- 0.0025-0.75 parts accelerator to form aggregate pellets of a predetermined size range,
- (c) removing said aggregate pellets from said pelletizing device, and
- (d) curing said aggregate pellets with an oxygen containing gas at a temperature less than about 300.degree. F.
Dependencies are inferred from the claim text.