Use of MWC combined ash for highway embankment application
A field study was conducted to demonstrate the suitability of using municipal waste combustor (MWC) combined ash in high way embankment applications. The ash embankment was constructed using conventional techniques and was evaluated for the geotechnical properties and environmental acceptability. Field evaluation of the geotechnical performance of the embankment included specifically California Bearing Ratios (CBR), infiltration, pressuremeter, and cone penetrometer. Environmental analysis determined the ash embankment's leachate and runoff concentrations of As, Ba, Cd, Cr, Pb, Hg, Ag, and Se over time for comparison with drinking water and toxicity standards. Findings of the study indicated that combined ash could be sued as highway fill using conventional construction equipment and methods. The percent of the eight elemental metals in the ash lost to leachate or runoff after one year of exposure to natural rainfall was determined to be less than 0.01% and 0.005%, respectively, of their original weight in the ash. This indicates that greater then 99.99% of each of the eight elemental metals were retained in the ash. Concentrations of the eight EPA listed elemental metals in runoff and leachate from the ash embankment were below the EPA TCLP criteria and drinking water criteria. Results of the one-year monitoring study indicated that, based on the elemental metals examined, WMC combined ash is considered to be environmentally acceptable for highway fill materials applications.
- Research Organization:
- Florida Inst. of Tech., Melbourne (US)
- OSTI ID:
- 20017375
- Resource Relation:
- Conference: 6th Annual Waste-to-Energy Conference, Miami Beach, FL (US), 05/11/1998--05/13/1998; Other Information: PBD: 1998; Related Information: In: 6th annual waste-to-energy conference, 328 pages.
- Country of Publication:
- United States
- Language:
- English
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