Production of flyash-based structural materials. Period of performance: December 1965--February 1972. Final report

Technical Report ·

OSTI ID:7366774

Cockrell, C F; Humphreys, K K; Leonard, J W; McFadden, C R; Shafer, Jr, H E; Slonaker, J F

When pulverized coal is fired in an electric utility boiler, about 70-80 percent of the coal ash is collected by mechanical or electrical means to prevent emission of the particulate matter to the atmosphere. Capital investment required to collect flyash and the resulting operating costs often add substantially to the cost of using coal as a fuel. In addition, large costs are incurred in disposing of the flyash. In some instances, disposal costs have been in excess of $2.00 per ton of ash. Although various uses have been developed for flyash (lightweight aggregate, soil stabilizer, concrete additives, etc), poor public acceptance, and industrial and governmental restrictions on its chemical and physical properties have greatly limited its use. In 1970, for example, only 8 percent of the total U. S. flyash production was sold. The magnitude of the problem is apparent from the fact that in 1970 electric power stations in the United States produced over 26 million tons of flyash, and the tonnage is increasing annually. In an effort to develop new and expanded uses for flyash, a basic process was developed to produce high-quality, dry-pressed, flyash-based brick and other materials which could utilize virtually any flyash without undue regard to its physical and chemical properties. The process has high economic potential and holds the promise of providing a major new use for waste coal ash. Now, a second contract has resulted in the development of the process to the point that commercial success appears highly probable. (auth)

• Research Organization: West Virginia Univ., Morgantown (USA). Coal Research Bureau
• OSTI ID: 7366774
• Report Number(s): OCR-69
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010900* -- Coal
Lignite
& Peat-- Environmental Aspects
ADDITIVES
AEROSOL WASTES
ALKALI METAL COMPOUNDS
BINDERS
BRICKS
BUILDING MATERIALS
CHEMICAL COMPOSITION
ECONOMICS
FABRICATION
FLY ASH
MATERIALS
OXYGEN COMPOUNDS
SILICATES
SILICON COMPOUNDS
SODIUM COMPOUNDS
SODIUM SILICATES
USES
WASTES