Fly ash and fly ash concrete

Technical Report · Tue May 01 00:00:00 EDT 1984

OSTI ID:6450107

Dunstan, Jr, E R

Fly ash is a residue that results from the combustion of ground or powdered coal. Historically, fly ash has been referred to as a pozzolan and is used to reduce the amount of portland cement in concrete. However, in many Western States fly ashes have cementitious properties as well as pozzolanic properties, and they are capable of producing good strengths without portland cement. This study discusses test results of several ashes according to ASTM: C 618, Standard Specification for Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixture in Portland Cement Concrete. Many changes are suggested. The replacement of 15 to 25 percent by mass of portland cement in concrete is examined. A few highly cementitious ashes were used to make concrete without portland cement. A new cement was developed that consists of over 90-percent fly ash and anhydrous CaSO4. Test data for most concretes include: mix proportions, compressive strength, elasticity, drying shrinkage, sulfate resistance, and freeze-thaw durability. Other results included are adiabatic temperature rise, alkali-aggregate reaction, and modulus of rupture.

• Research Organization: Bureau of Reclamation, Denver, CO (USA). Engineering and Research Center
• OSTI ID: 6450107
• Report Number(s): PB-84-222496
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CONCRETES
WASTE PRODUCT UTILIZATION
FLY ASH
CEMENTS
SERVICE LIFE
AEROSOL WASTES
ASHES
BUILDING MATERIALS
MATERIALS
RESIDUES
WASTES
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management