Performance of lignite and subbituminous fly ash in concrete: a progress report

Technical Report · Thu Jan 01 00:00:00 EST 1976

OSTI ID:7125799

Dunstan, Jr, E R

Vast reserves of subbituminous and lignite coal will be used in power production in the United States in the years to come. A byproduct, fly ash, collected from the flue gases of coal burning powerplants will be produced in large quantities. Since bituminous coal fly ash has been used in concrete to considerable advantage for several years now, it is quite likely that similar use could be made of lignite and subbituminous coal fly ashes. If so, this material could provide a plentiful supply of a potentially low cost cementing medium for use with portland cement in concrete. Fly ashes were obtained from five Western United States powerplants. A complete chemical and physical analysis of each lignite and subbituminous ash was made and none were found to meet all requirements for a Class F pozzolan according to Federal Specification SS-P-570B. Concrete mixes were made with 15 and 25% replacement of cement, by weight, with these fly ashes, and compared to a mix containing no fly ash and to mixes containing 15 and 25% replacement of fly ash meeting the requirements for a Class F pozzolan. The resulting hardened concrete was found to have adequate compressive strength, reduced drying shrinkage, and satisfactory freeze-thaw durability, but, in some cases, drastically reduced resistance to sulfate attack. (GRA)

• Research Organization: Bureau of Reclamation, Denver, CO (USA). Engineering and Research Center
• OSTI ID: 7125799
• Report Number(s): PB-253010; REC-ERC-76-1
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CONCRETES
FLY ASH
CHEMICAL ANALYSIS
USES
COAL
COMBUSTION
COST
FLUE GAS
FOSSIL-FUEL POWER PLANTS
LIGNITE
MOISTURE
PHYSICAL PROPERTIES
SOLID WASTES
SUBBITUMINOUS COAL
WASTE DISPOSAL
AEROSOL WASTES
BROWN COAL
BUILDING MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASEOUS WASTES
MANAGEMENT
MATERIALS
OXIDATION
POWER PLANTS
THERMAL POWER PLANTS
WASTE MANAGEMENT
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
010500 - Coal
Lignite
& Peat- Products & By-Products
010600 - Coal
Lignite
& Peat- Properties & Composition