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Assessing Environmental Impacts Associated with Bases and Subgrades Stabilized with Coal Combustion Products (CCPs)

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 Final Report
March 2008
June 2008
September 2008 		   
Project ID: CFIRE 01-03
Title Assessing Environmental Impacts Associated with Bases and Subgrades Stabilized with Coal Combustion Products (CCPs)
PIs:

Tuncer Edil & Craig Benson
Department of Civil and Environmental Engineering
University of Wisconsin - Madison

Project Objectives:

The objectives of project CFIRE 01-03:

  • Determine groundwater impacts of pavement materials stabilized with CCPs.

  • Analyze how different pH conditions affect leaching from CCP materials.

  • Prepare a report describing the findings from the leaching tests and the modeling efforts.
Project Abstract: Conventional construction materials are becoming increasingly expensive as demands on resurces intensify. In addtion, concerns regarding energy use and greenhouse gas emission associated with manufacturing and delivering conventional construction materials has led to significant interest in exploring alternative materials such as recycled materials. Stabilizing bases and subgrades with coal combustion products (CCPs) represents a way to uprade highway infrastructure while utilizing recycled materials. This project will use WiscLEACH to assess groundwater impacts caused by the leaching of trace elements from pavement materials stabilized with CCPs.
Task Descriptions:
  1. Select three fly ashes that represent a range of conditions in the Midwest.
  2. Observe leaching over a range of pH conditions that bracket conditions typically observed in the field.
  3. Use analytical solutions to predict groundwater concentrations beneath a highway and compliance with water quality standards.
  4. Evaluate potential impacts on groundwater with WiscLEACH using the data collected from leaching process.
Duration, Dates:

12 months; November 15, 2007 - December 31, 2008

Budget:

$49,542
Modal Orientation: Energy and Environment
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