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An alternative cover for landfill may be formed from a slurry mixture of water, cementitious binder, adhesion enhancing admixture and fiber. These constituents may be mixed and applied to cover landfilled wastes, granular material piles or for soil erosion control. The cover will harden to minimize water infiltration, wind blown dust, odor and affinity to birds, flies and other insects. The water may include tap water, landfill leachate and wastewater. The binder may include Portland cement, blended cement, cement kiln dust, class C fly ash, and/or calcium sulphate hemihydrate. The adhesion enhancing admixture includes water-dispersible polymers. The fibers may comprise shredded paper or wood or plastic fibers.

Titel:	Composition and method for forming a sprayable materials cover
Autor/in / Beteiligte Person:	Shi, Caijun ; Wu, Yanzhong
Link:	View record in USPTO Patent Grants (Volltext)
Veröffentlichung:	2007
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Grants Sprachen: English Patent Number: 7,284,930 Publication Date: October 23, 2007 Appl. No: 10/689415 Application Filed: October 20, 2003 Assignees: CJS Technology, Inc. (Ontario, CA) Claim: 1. A bulk material cover, which comprises: (a) about 30 to about 70 weight percent liquid; (b) about 5 to about 60 weight percent cementitious material; (c) about 0.1 to 5 weight percent water-dispersible polymer comprising a member selected from the group consisting of water-based paint and paint sludge; (d) up to about 60 weight percent inert filler; and (e) up to about 20 weight percent fiber, wherein the indicated weight percents are based on total weight of the material. Claim: 2. The cover according to claim 1 , wherein the liquid is selected from the group consisting of landfill leachate, water and wastewater. Claim: 3. The cover according to claim 1 , wherein the cementitious material is selected from the group consisting of portland cement, blended cement, masonry cement, calcium aluminate, slag cement, alkali-activated slag cement, coal fly ash, cement kiln dust, calcined gypsum, and any mixture thereof. Claim: 4. The cover according to claim 1 wherein the water-based paint is waste water-based paint. Claim: 5. The cover according to claim 1 wherein the powder filler is selected from the group consisting of clay, ground recycled glass, shredded construction debris, demolition debris, sand, crushed stone dust, and any mixture thereof. Claim: 6. The cover according to claim 1 , wherein the fiber is selected from the group consisting of shredded paper, shredded wood, polyethylene terephthalate, chopped straw, hay, and any mixture thereof. Claim: 7. The cover of claim 1 containing up to about 3% thickening agent. Claim: 8. The cover according to claim 7 , wherein the thickening agent is selected from the group consisting of methyl cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose, and mixtures thereof. Claim: 9. The cover of claim 1 containing up to about 3% pigment. Claim: 10. The cover of claim 1 containing a chemical odor control additive. Current U.S. Class: 4051/291 Patent References Cited: 3466873 September 1969 Present ; 3635409 January 1972 Brewer ; 4002171 January 1977 Taft ; 4028130 June 1977 Webster et al. ; 4076862 February 1978 Kobeski et al. ; 4297810 November 1981 Hansford ; 4374672 February 1983 Funston et al. ; 4421788 December 1983 Kramer ; 4432666 February 1984 Frey et al. ; 4519338 May 1985 Kramer et al. ; 4790691 December 1988 Freed ; 4834300 May 1989 Wojciechowski et al. ; 4909667 March 1990 DeMello ; 4927317 May 1990 Acosta ; 4950426 August 1990 Markowitz et al. ; 5024770 June 1991 Boyd et al. ; 5040920 August 1991 Forrester ; 5054962 October 1991 Bahnmuller et al. ; 5082500 January 1992 Nachtman et al. ; 5096616 March 1992 Kittle ; 5133991 July 1992 Norman et al. ; 5161915 November 1992 Hansen ; 5181803 January 1993 Smith et al. ; 5215786 June 1993 Kittle ; 5244311 September 1993 Galante ; 5275508 January 1994 Hansen ; 5320450 June 1994 Smith ; 5385607 January 1995 Kiesewetter et al. ; 5416133 May 1995 Garcia et al. ; 5516830 May 1996 Nachtman et al. ; 5525009 June 1996 Hansen ; 5536116 July 1996 Lamers et al. ; 5556033 September 1996 Nacthman ; 5696174 December 1997 Chao et al. ; 5849364 December 1998 Nachtman et al. ; 5853050 December 1998 Kittle ; 5855664 January 1999 Bielecki et al. ; 5975801 November 1999 Burns, Sr. et al. ; 6096373 August 2000 Nachtman et al. ; 6110271 August 2000 Skaggs et al. ; 6264400 July 2001 Gent ; 6435770 August 2002 Shi ; 6550750 April 2003 Kalkstein et al. ; 6558079 May 2003 Kozak et al. ; 6558080 May 2003 Kozak ; 6579570 June 2003 Lang et al. ; 6586529 July 2003 Mumick et al. Other References: Answer 8 of 15 Chemical Abstracts on STN□□□□WO 9964368 Jeszensky et al. (Dec. 16, 1999) abstract only. cited by examiner ; Answer 64 of 83 Chemical Abstracts on STN□□□□EP 537999 Colegrave et al. (Apr. 21, 1993) abstract only. cited by examiner ; Answer 77 of 135 Chemical Abstracts on STN□□□□CA 2184047 Trieu (Feb. 25, 1997) abstract only. cited by examiner ; Airtrol Geobinder; “Despite steep slopes and heavy rainfall, AIRTORL is effective in preventing soil erosion”. cited by other ; Cement and Concrete Composites 20 (1998) p. 171-188; Kamal H. Khayat; “Viscosity-Enhancing Admixtures for Cement-Based Materials-An Overview”. cited by other ; Wisconsin Statewide Waste Characterization Study Summary 2002. cited by other ; Earth Tech Canada, Inc.; “Waste Latex Paint Re-Use Project”; The Waste Diversion Organization and the City of London; Final Report—Jun. 22, 2001. cited by other ; 1999 Coal Combustion Product (CCP) Production and Use (Short Tons) American Coal Ash Association (ACAA). cited by other ; Integrated Waste management Board; “Drywall Recycling”; 7-pages. cited by other ; Southwest Environment Services, Inc.—Alternate Daily Cover for Landfills; 4-Pages. cited by other Primary Examiner: Marcantoni, Paul Attorney, Agent or Firm: Nields & Lemack

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Composition and method for forming a sprayable materials cover