pervious

Metals Recovery From Acid Mine Drainage Using Pervious Concrete: A Brief Examination of Using Pervious Concrete to Economically Remove Metals from Acid ... Waste Streams for Resale on the Open Market
$63.00
Pervious concrete has grown in popularity as an alternative infrastructure medium to enhance the quality of surface water in developed geographical areas. Previous studies have shown that pervious concrete structures and the subgrade layer that supports them are effective at significantly reducing the concentrations of common pollutants such as soap, motor oil, brake fluid, brake dust, and roof shingle particles from rain water and snow melt. Studies thus far have shown enough promise to encourage growing use of pervious concrete in infrastructure categories such as storm channels, sidewalks and parking lots. This paper examines the use of pervious concrete to remove metals and neutralize pH from a synthetic solution simulating acid mine drainage (AMD). In addition, destructive testing of cores taken from pre-filtration and post filtration filters were used to evaluate the potential lifespan of a pervious concrete filter when exposed to the prolonged flow of polluted water. The dimensions of the filter allow for ease of handling by manual labor or the use of machinery that can be transported by standard off-road vehicles.

Permeability predictions for sand-clogged Portland cement pervious concrete pavement systems [An article from: Journal of Environmental Management]
$10.95
This digital document is a journal article from Journal of Environmental Management, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Pervious concrete is an alternative paving surface that can be used to reduce the nonpoint source pollution effects of stormwater runoff from paved surfaces such as roadways and parking lots by allowing some of the rainfall to permeate into the ground below. This infiltration rate may be adversely affected by clogging of the system, particularly clogging or covering by sand in coastal areas. A theoretical relation was developed between the effective permeability of a sand-clogged pervious concrete block, the permeability of sand, and the porosity of the unclogged block. Permeabilities were then measured for Portland cement pervious concrete systems fully covered with extra fine sand in a flume using simulated rainfalls. The experimental results correlated well with the theoretical calculated permeability of the pervious concrete system for pervious concrete systems fully covered on the surface with sand. Two different slopes (2% and 10%) were used. Rainfall rates were simulated for the combination of direct rainfall (passive runoff) and for additional stormwater runoff from adjacent areas (active runoff). A typical pervious concrete block will allow water to pass through at flow rates greater than 0.2cm/s and a typical extra fine sand will have a permeability of approximately 0.02cm/s. The limit of the system with complete sand coverage resulted in an effective system permeability of approximately 0.004cm/s which is similar to the rainfall intensity of a 30min duration, 100-year frequency event in the southeastern United States. The results obtained are important in designing and evaluating pervious concrete as a paving surface within watershed management systems for controlling the quantity of runoff.

Source Control Using Constructed Pervious Surfaces: Hydraulic, Structural and Water Quality Performance Issues
$329.00
This title discusses the critical issues that should be considered when designing and constructing pervious pavements that are to be used as a technique for stormwater source control. It details the types of surfaces available and provides examples of developments that have used these techniques. It explores the issues you need to consider relating to the hydraulic, structural and water quality performance of pervious surfaces. Finally, the book provides a design framework, which includes detailed recommendations for methods where necessary. To assist the reader in finding the relevant sections when using this design framework, key sections of text have been highlighted throughout the book. The book is intended for use by developers, landscape architects, consulting engineers, local authorities, architects, highway authorities, environmental regulators, planners, sewerage undertakers, contractors and other organisations involved in the provision or maintenance of surface water drainage to new and existing developments.

My Less Than Pervious Eye
$0.89