Solidification/stabilization of spent abrasives and use as nonstructural concrete

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Waste Management; (United States)

DOI:https://doi.org/10.1016/0956-053X(93)90062-2· OSTI ID:5524894

Brabrand, D J; Loehr, R C ^[1]

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1. Univ. of Texas, Austin, TX (United States)

Tons of spent abrasives result each year from the removal of old paint from bridges. Because the spent abrasives contain metals from the paint, some spent abrasives may be considered hazardous by the Toxicity Characteristic (TC) criteria. Incorporation of the spent blasting abrasives in nonstructural concrete (rip-rap, dolphins) offers an opportunity to recycle the spent abrasives while immobilizing potentially leachable metals. This study focused on the Portland Cement Solidification/Stabilization (S/S) of spent blasting abrasives taken from a bridge located in Southeast Texas. The study examined (a) the cadmium, chromium, and lead concentrations in extracts obtained by using the Toxicity Characteristic Leaching Procedure (TCLP) and (b) the compressive strengths of Portland Cement mixes that contained different amounts of the spent abrasives. Performance was measured by meeting the TC criteria as well as the requirements for compressive strength. Study results indicated that considerable quantities of these spent abrasives can be solidified/stabilized while reducing the leachability of cadmium, chromium, and lead and producing compressive strengths over 6,895 kN/m[sup 2] (1,000 psi).

• OSTI ID: 5524894
• Journal Information: Waste Management; (United States), Journal Name: Waste Management; (United States) Vol. 13:4; ISSN WAMAE2; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
ABRASIVES
BUILDING MATERIALS
CADMIUM
CHROMIUM
COATINGS
CONCRETES
DISSOLUTION
ECOLOGICAL CONCENTRATION
ELEMENTS
LEACHING
LEAD
MATERIALS
METALS
PAINTS
PHASE TRANSFORMATIONS
RECYCLING
SEPARATION PROCESSES
SOLIDIFICATION
STABILIZATION
TRANSITION ELEMENTS