Geoenvironmental impacts of using high carbon fly ash in structural fill applications : [research summary].

Details

• Creators:
  Aydilek, Ahmet
• Corporate Creators:
  University of Maryland (College Park, Md.). Department of Civil and Environmental Engineering
• Subject/TRT Terms:
  • Fly ash
  • Admixtures
  • Concrete
  • Environmental impacts
  • Leaching
  • Embankments
  • Laboratory tests
  • Toxicity
  • Metals
  • Fly ash--Leaching
  More +
• Publication/ Report Number:
  SP909B4P
• Resource Type:
  Tech Report
• Geographical Coverage:
  Maryland
• Corporate Publisher:
  Maryland. State Highway Administration
• Abstract:
  Coal power plants generate approximately 50% of the electricity in the ; United States. As a result, large amounts of coal combustion byproducts, ; especially fly ash, are produced annually. Only 40% of the fly ash ; (mainly C and F-type classifications) can be successfully reused in ; applications such as cement, concrete production, and soil stabilization. ; The rest of these materials contain significant amounts of unburned ; carbon and cannot be used as a concrete additive. As a result, they are ; largely disposed of in landfills. ; There have been significant efforts to reuse high-carbon fly ash (HCFA) ; in highway applications such as highway base layers and embankments ; because it is a geomechancially strong material. However, the potential ; for leaching heavy metals to groundwater is the key concern that ; currently prevents reuse for these applications.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25789/dot_25789_DS1.pdf
• File Type:
  [PDF - 60.83 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:0f674681ef74885892d688bf90c7ee45029a9f7ba8f55a0a538d56a652603855f19d53b42ff9a6a830e792603108da9e6b54b8ab3228c508f819094cedad8f6e