Strength and Permeability of Pervious Concrete
Record Type: DOT
The use of pervious concrete to-date is limited to sidewalks and to low volume and low speed traffic, such as parking areas. These structures are not subjected to traditional design wheel loads. However, the trend is in favor of using pervious concrete in alleyways and lightly travelled city streets and neighborhoods. Fully loaded trash trucks, over time, can stress alley pavements, and may cause early pavement failures. Thus, pervious concrete pavements need to be designed structurally (like ordinary rigid and flexible pavements) to handle some level of loading and for an anticipated lifetime. It appears that the design strength parameters are not readily obtainable. The objective of the study is, thus, to investigate and develop procedures for making pervious concrete cylinders, in order to determine properties of pervious concrete, such as strength (compressive and modulus of rupture), void ratio, permeability, and freeze-thaw characteristics. Once these procedures are developed, standardized methods for the placement of pervious concrete can be refined, and performance can be predicted, through calibration with laboratory scale methods and strength parameters established for design purposes. The research will investigate the above characteristics on various mixes proportioned with varying amounts of single-size coarse aggregate, fine aggregate and modifying agents.
Start date: 2012/10/1
End date: 2013/9/30
Total Dollars: 85000
Source Organization: District of Columbia Department of Transportation
Date Added: 08/16/2012
Index Terms: Pervious concrete, Concrete strength, Strength of materials, Permeability, Materials tests, Concrete pavements,
Howard University Transportation Research Center
2366 6th Street
Washington, DC 20059
Arhin, Stephen A.