Testing and correlation of fly ash properties with respect to pozzolanic behavior. Final report
This report contains the results of an investigation of 11 fly ashes, obtained from pulverized-coal-fired furnaces of various designs and located in different parts of the United States. Seven of the fly ashes were the combustion products of bituminous coals; three fly ashes came from subbituminous coal; and the remaining specimen from lignite coal. The calcium oxide content of the fly ashes from bituminous coals was less than 7%; that of the other fly ashes varied from about 15 to 27%. The silicon dioxide/aluminum oxide ratio in the 11 fly ashes ranged from 1.45 to 2.80. The purpose of this investigation was to obtain complete physical-chemical characterization data on the fly ashes and to correlate these characteristics with (1) the coal source and furnace type, and (2) the performance of the fly ash in portland cement-fly ash mortars. The performance of a given fly ash in portland cement-fly ash mixtures was found to be independent of the coal source and furnace design. The calcium content and particle size distribution of the fly ash were judged the two most important parameters determining the relative reactivity of the fly ashes. ASTM procedures for classifying fly ashes and testing their pozzolanic activity did not prove useful in evaluating the performance characteristics of the fly ash in portland cement mortars. New test procedures are recommended for assessing the relative reactivity of different fly ashes when a fly ash is to be used as mineral admixture in portland cement concrete. 4 references, 19 figures, 8 tables.
- Research Organization:
- California Univ., Berkeley (USA). Dept. of Civil Engineering
- OSTI ID:
- 5370118
- Report Number(s):
- EPRI-CS-3314; ON: DE84920302
- Country of Publication:
- United States
- Language:
- English
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AEROSOL WASTES
ASHES
BITUMINOUS COAL
BLACK COAL
BROWN COAL
BUILDING MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL PROPERTIES
COAL
COAL FINES
COMBUSTION PRODUCTS
COMPRESSION STRENGTH
CONCRETES
CORRELATIONS
DATA
DESIGN
ENERGY SOURCES
EXPERIMENTAL DATA
FLY ASH
FOSSIL FUELS
FUELS
FURNACES
INFORMATION
LIGNITE
MATERIALS
MECHANICAL PROPERTIES
MINERALOGY
MORTARS
NUMERICAL DATA
PARTICLE SIZE
PHYSICAL PROPERTIES
RESIDUES
SIZE
SUBBITUMINOUS COAL
SURFACE AREA
SURFACE PROPERTIES
WASTE PRODUCT UTILIZATION
WASTES