# US 4,374,743 A · Method of preparing snow and ice control compositions

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- Number: US 4,374,743 A
- Document ID: US4374743A
- Status: Granted
- Kind: A
- Application number: 06/203,642
- Filed: 1980-11-03
- Granted: 1983-02-22
- Earliest claimed: 1979-05-14
- Inventors: Richard F. Stockel
- Web page: https://patentgrep.com/patent/US4374743A

## CPC

- C09K 3/185: {Thawing materials}
- C09K 3/149: {Antislip compositions}
- Y10S 106/01: Fly ash
- Y10S 264/49: Processes of using fly ash
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A method of preparing a snow and ice control composition to improve traction on ice and snow covered surfaces. The composition comprises coal ash, binder, a melting depressant and enough water to form a dough-like mixture with said mixture pelletized by extrusion through a die and cured to form particles ranging in size from 1/16 th to 11/2 inches. The resulting said pellets have excellent strength and can be formulated to be environmentally acceptable.

## Claims

### Claim 1

A method of preparing a snow and ice control composition comprising the steps of combining a coal ash material, a salt and/or organic material for lowering the melting point of snow or ice, a silicate finding agent having a silica/alkali metal oxide ratio of 3.50 to 2.00 and enough water to form a dough-like workable mixture; pelletizing said mixture and heating said pellets to form shaped particles having excellent crush resistance.

### Claim 2 (depends on 1)

The method of claim 1 wherein said pelletized snow and ice control particle is heated at a temperature of 100.degree. C. or above to cause polymerization of said silicate binder.

### Claim 3 (depends on 1)

The method of claim 1 wherein the coal ash material is fly ash.

### Claim 4 (depends on 1)

The method of claim 1 wherein the coal ash material is bottom ash.

### Claim 5 (depends on 1)

The method of claim 1 wherein the coal ash material is boiler slag.

### Claim 6 (depends on 1)

The method of claim 1 wherein the binding agent is sodium or potassium silicate with a silica/alkali metal oxide ratio from 3.50 to 2.00, containing from 15%-35% by weight of the silicate based on the weight of the coal ash.