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Solidification/stabilization of used abrasive media for non-structural concrete using Portland cement
Solidification/stabilization of hazardous blast sand
Center for Transportation Research, University of Texas
Available through the National Technical Information Service
Highway bridges in the United States are painted to resist corrosion and to help maintain the structural integrity of the bridge. Periodically, it is necessary to remove the existing paint so that the surface can be repainted. Most often the removal process consists of blasting the surface with an abrasive such as sand or slag. The blast media then contains elements present in the paint, such as cadmium, chromium and lead. The Texas Department of Transportation (TxDOT) has begun to recycle spent abrasive media in portland cement-based concrete using solidification/stabilization (S/S) techniques. This technology is designed to immobilize the metals, while recycling the spent abrasive media as a component in non-structural concrete. This study has revealed the effectiveness of portland cement-based S/S systems in recycling contaminated spent abrasive media in portland cement-based concrete. The long-term leaching behavior of metals from these concrete products was examined using sequential extraction leaching tests.
Summary -- Introduction -- Literature review -- Materials and methods -- Results -- Discussion -- Conclusions -- Appendices.
"Conducted for the Texas Department of Transportation in cooperation with the U.S. Department of Transportation, Federal Highway Administration by the Center for Transportation Research, Construction Materials Research Group, Bureau of Engineering Research, the University of Texas at Austin."
Includes bibliographical references (pages 199-202).
Research report (University of Texas at Austin. Center for Transportation Research) ; no. 1315-2