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:
  Concrete Pavements Cost Effectiveness Diamond Grinding Environmental Impacts Evaluation Pollutants Runoff Slurry Soil Chemistry
• 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:ba87c5248e1de657281cc95caab043444db0fe66bee1064dd7e3af82c5c6668d
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29490/dot_29490_DS1.pdf
• File Type:
  [PDF - 1.01 MB ]