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

Mamo, Martha; McCallister, Dennis; Schacht, Walter; Wingeyer, Ana

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

2015-10-01
By Mamo, Martha ; McCallister, Dennis ; Schacht, Walter ; ...

File Language:

English

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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 ]

File Language:

English

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