Runoff from agricultural activities can adversely affect the environment; however, little research has been conducted to determine the performance of pervious concrete for use in agriculture. Pervious concrete, with its unique infiltration properties, could be beneficial when used as a solid/liquid separation material for animal feeding pads, manure, or compost storage pads. Laboratory tests were conducted on replicated samples of pervious concrete made from two aggregate sources (river gravel and limestone) with two size fractions from each aggregate. Water was filtered through composted beef cattle manure and bedding (compost) that was placed on top of the pervious concrete specimens. T-tests indicated that the mass of compost retained on the surface of the pervious concrete specimens was significantly greater when smaller aggregate sizes (#8 river gravel) were used (p=0.012). Nutrient analyses were conducted on the effluent from the compost on pervious concrete and compared to values from an identical test performed by filtering water through compost on an 80 grade wire mesh screen. Filtering the compost effluent through pervious concrete resulted in significant reductions in total nitrogen, soluble phosphorus, and total phosphorus compared to the wire screen; however, no consistently significant differences were found with respect to the other analytes (e.g. dissolved organic carbon, ammonium, nitrate, and nitrite). The use of different aggregate types (river gravel or limestone) or different additives (fly ash or fibres) did not have any significant effect on analyte levels. This suggests that combinations of these materials in pervious concrete mixtures will not affect the performance of pervious concrete in this type of application.
|Number of pages||8|
|State||Published - Jul 2008|
Bibliographical noteFunding Information:
Successful completion of all laboratory tests would not have been possible without the technical assistance of Tiffany Graham, Laura Steinmetz, Ann Freytag, Kelly Silva, Josiane Oliveira, Tami Smith, and Jim Crutchfield. This project was completed with assistance from the Kentucky Ready Mixed Concrete Association and funding from the Portland Cement Association. The authors would also like to acknowledge the support and collaboration of the Department of the Interior, US Geological Survey and the University of Kentucky Research Foundation, under Grant Number 06HQGR0087.
ASJC Scopus subject areas
- Control and Systems Engineering
- Food Science
- Agronomy and Crop Science
- Soil Science