Properties of high fly ash content cellular concrete

Journal Article · Fri Apr 01 04:00:00 EST 1994 · Journal of Energy Engineering; (United States)

DOI:https://doi.org/10.1061/(ASCE)0733-9402(1994)120:1(35)· OSTI ID:7260454

Neufeld, R D; Vallejo, L E; Hu, W; Latona, M; Carson, C; Kelly, C ^[1]

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1. Univ. of Pittsburgh, PA (United States). Dept. of Civil and Environmental Engineering

High fly ash content autoclaved cellular concrete is produced by adding calibrated quantities of aluminum powder to a mixture of fly ash (60% wt/wt), cement, and water. The foamed product is hardened in an autoclave with pressurized steam at about 180 C. Block material for samples tested originated from a mobile pilot plant that toured sites of United States-based electric utilities. Compressive strengths of the foamed product were controlled to the range of 300--600 psi, with dry weight densities on the order of 32--37 lb/cu ft. Heavy metal concentrations in TCLP, ASTM, and synthetic acid rain leachates were on the order one to 10 times that found in Pittsburgh tap water, and never approached 100 times drinking water standards. Organic contents of leachates were not detectable. Controlling pore distributions appears to influence density, moisture accumulation rates, and mechanical/physical properties that are significant for construction.

• OSTI ID: 7260454
• Journal Information: Journal of Energy Engineering; (United States), Journal Name: Journal of Energy Engineering; (United States) Vol. 120:1; ISSN JLEED9; ISSN 0733-9402
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600 -- Coal
Lignite
& Peat-- Properties & Composition
010800* -- Coal
Lignite
& Peat-- Waste Management
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
360606 -- Other Materials-- Physical Properties-- (1992-)
AEROSOL WASTES
ASHES
BUILDING MATERIALS
BULK DENSITY
CHEMICAL COMPOSITION
COMBUSTION PRODUCTS
COMPRESSION STRENGTH
CONCRETES
DENSITY
DISSOLUTION
ELEMENTS
FLY ASH
LEACHING
MATERIALS
MECHANICAL PROPERTIES
METALS
PHYSICAL PROPERTIES
RESIDUES
SEPARATION PROCESSES
WASTE PRODUCT UTILIZATION
WASTES