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US4120738A
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US
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Light weight aggregate and method for making same
Assignee: Champion International Corp
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Filing: 1977-10-11
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Granted: 1978-10-17
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Expires: 1997-10-11
Abstract
Abstract A light weight aggregate is described which is formed of fly ash and solids derived from the caustic extract filtrate produced in a kraft pulping process. In a method for producing the light weight aggregate caustic extract filtrate produced in a kraft pulping process is concentrated to a desired level. The concentrated filtrate is then mixed with water and fly ash to produce a green agglomerate which is extruded into discrete pellets. The pellets are then burned to produce a light weight high strength aggregate.
Inventors
- 👤 Dan C. Tate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:23
CPC Classifications
C; C08; C08L; C08L97/00; C08L97/005; C04; C04B; C04B18/00; C04B18/02; C04B18/027; C04B20/00; C04B20/02; C04B20/04; C04B20/06; C04B20/068; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
52 words
A method for producing a light weight aggregate comprising the steps of composing a mixture of caustic extract filtrate obtained from a kraft pulping process with fly ash and water to produce a wet agglomerate; forming the wet agglomerate into discrete bodies; and burning said bodies to form said light weight aggregate.
Claim 2
Independent Claim
52 words
A method for producing a light weight aggregate comprising the steps of composing a mixture of caustic extract filtrate obtained from a kraft pulping process with fly ash and water to produce a wet agglomerate; forming the wet agglomerate into discrete bodies; and burning said bodies to form said light weight aggregate.
Claim 3
Dependent Claim
20 words
The method as set forth in claim 1 wherein the forming step consists of extruding the wet agglomerate into pellets.
Claim 4
Dependent Claim
31 words
The method as set forth in claim 1 wherein the composing step includes the step of evaporating liquid from the caustic extract filtrate to obtain a desired concentraton of solids therein.
Claim 5
Dependent Claim
34 words
The method as set forth in claim 3 wherein the evaporating step provides a caustic extract filtrate having a concentration of solids in the range of from about 30.0% to about 45.0% by weight.
Claim 6
Dependent Claim
20 words
The method as set forth in claim 4 wherein the caustic extract filtrate has a concentration of about 31.5% solids.
Claim 7
Dependent Claim
82 words
The method as set forth in claim 1 wherein the composing step includes the mixture of water in an amount from about 15.0% to about 20.0% by weight of the fly ash and wherein the caustic extract filtrate is present in an amount of from about 1.0% to about 1.5% by weight of the fly ash with a concentration of solids in said caustic extract filtrate being in the amount of from about 30.0% to about 45.0% by weight in said filtrate.
Claim 8
Dependent Claim
13 words
A light weight aggregate made in accordance with the method of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |