Evaluation of concrete grinding residue (CGR) slurry application on vegetation and soil responses along Nebraska State HWY 31.

Details

• Creators:
  Mamo, Martha ; McCallister, Dennis ; Schacht, Walter ; Wingeyer, Ana
• Corporate Creators:
  University of Nebraska--Lincoln. Dept. of Agronomy and Horticulture
• Subject/TRT Terms:
  • Diamond grinding
  • Concrete pavements
  • Slurry
  • Pollutants
  • Environmental impacts
  • Runoff
  • Soil chemistry
  • Cost effectiveness
  • Evaluation
• Publication/ Report Number:
  SPR-P1(13)M335
• Resource Type:
  Tech Report
• Geographical Coverage:
  Nebraska
• Corporate Publisher:
  Nebraska. Dept. of Roads
• Abstract:
  Diamond grinding is a concrete pavement restoration technique that corrects irregularities ; such as faulting and roughness on old concrete pavements and extends the life of pavement. ; Cooling water used during the diamond grinding of concrete pavement highways generates ; slurry consisting of water, concrete and aggregate residue (CGR). Recently, disposal of CGR in ; Nebraska changed from unregulated roadside discharge to a National Pollutant Discharge ; Elimination System (NPDES) permit (NDEQ, 2010). The permit is designed to control pollutant ; levels being land applied as a result of the spreading of CGR slurry. According to NPDES ; permit, the CGR primary pollutant is its alkalinity and the amount of CGR that can be roadside ; applied is restricted to 5 dry tons/acre or the agronomic liming rate whichever is lower. ; The Nebraska Department of Roads (NDOR) is concerned that existing agronomic rate ; calculation methods were developed to minimize the active ingredient (lime) application, as such, ; there is also need to evaluate maximum discharge rate of CGR for cost efficiency. Therefore, this ; research was established to evaluate rates that will maximize the CGR discharge rate without ; adverse effects on roadside vegetation and soil.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29490/dot_29490_DS1.pdf
• File Type:
  [PDF - 1.01 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:ba87c5248e1de657281cc95caab043444db0fe66bee1064dd7e3af82c5c6668d