FLY ASH-CEMENT MIXTURES FOR SOLIDIFICATION AND DETOXIFICATION OF OIL AND GAS WELL SLUDGES
Oil and gas well sludges usually consist of drill mud and formation cuttings, as well as various hydrocarbons. They are in a semiliquid state and vary widely in composition. The present environmental regulations in Canada and the United States require these sludges to be disposed of in an environmentally sound manner. Laboratory studies were conducted to determine the feasibility of solidifying and stabilizing oil and gas well sludges using portland cement, fly ash, lime, and sodium silicate mixtures. Oil well sludge samples from a site in Alberta, Canada, were mixed with various proportions and different combinations of the solidifying agents. Compressive strength tests were conducted to determine an optimum formulation of cement and fly ash that may be used to solidify the sludge. Hydraulic conductivity and microtoxicity tests were conducted on the solidified samples. The test results indicate that oil and gas well sludges in a semiliquid state with a solid content greater than 30% and having moderate toxicity can be effectively solidified using cement and fly ash mixtures with 15% of each by weight of solids in the sludge. Addition of 1% sodium silicate by weight of cement accelerates the strength development. Solidification also reduces the toxicity of sludges.
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- Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1486, Environmental Testing and Evaluation of Stabilized Wastes, Performance of Stabilized Materials, and New Aggregate Tests. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
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Authors:
- Joshi, R C
- Lohtia, R P
- Achari, G
- Publication Date: 1995
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 35-41
- Monograph Title: Environmental testing and evaluation of stabilized wastes, performance of stabilized materials, and new aggregate tests
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Serial:
- Transportation Research Record
- Issue Number: 1486
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Calcium oxide; Compression tests; Fly ash; Laboratory studies; Oil wells; Permeability coefficient; Portland cement; Sludge (Deposit); Sodium silicate; Soil stabilization; Solidification; Toxicity; Waste disposal
- Uncontrolled Terms: Stabilization
- Old TRIS Terms: Compressive strength tests; Sludge disposal; Test results
- Subject Areas: Geotechnology; Highways; Materials; I35: Miscellaneous Materials;
Filing Info
- Accession Number: 00713585
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Nov 22 1995 12:00AM