Design For Pervious Concrete
Design for Pervious Concrete (DPC)
One day course (6-7 hrs training)
Purpose: To familiarize Engineers, Architects and Designers with pervious concrete as a green paving alternative. To discuss issues affecting successful design with PC, including mix design, sizing, hydrology, siting, site preparation and post placement landscaping, layout, all aspects of placement execution, and long term care and maintenance.
1. Introdction (1/2 hr) 8:30
· History
· Benefits of PC
· Example Applications
2. Construction (1/2 hr) 9:00
· Layout
· Excavation
· Formwork
· Geotextile
· Subbase
· Placement
· Strike-off
· Compression
· Jointing & Edging
· Curing
· Backfill
3. Design Issues (1-1/2 hrs ) 9:30
· Siting
· Hydrologic
· Structural
· Mix Design & Testing
· Materials – aggregates, geotextile, admixtures, SCM, curing
· Quality Assurance
4. Design Exercise (1 hr) 11:00
· Participants in teams of 2 or 3 design a PC pavement
5. LUNCH (1 hr)
6. Demonstration Placement (1 hr) 1:00
· Live or slides and video
7. Maintenance (1/2 hr) 2:00
· Infiltration Testing
· Clogging and cleaning
8. Review, Conclusions & Recommendations (1/2 hr) 2:30
9. Test & Survey (1 hr) 3:00
3. Design Issues (1-1/2 hrs ) 9:30
o Siting
§ Appropriate use
· Parking vs. driving lanes (Auburn Condo)
· Passenger car & light truck
§ Elevation
· Low – Duck Samford - contamination
· High – arboretum walkways
· Flush - arboretum parking
§ Boundary conditions
· contamination (Duck Samford)
· Swales (Arboretum)
· Asphalt paving (Salvation Army Parking lot, Auburn)
· Arboretum pavilion entrance (Brick banding)
· Concrete curb (parking lots)
§ Slope
· min/max
· Detention structures
o Arboretum parking lot
o Arboretum cells
· Cross-slope (arboretum trails)
o Hydrologic
§ Passive mitigation
§ Active mitigation
§ Water infiltration
§ Water storage – estimating runoff
§ Water detention
§ Overflow piping
§ Adjacent structures
· Bioswale
· Rain garden
o Structural
§ Strength
· w/cm
· admixtures
· PC thickness – rule of thumb
· Compression
· Fiber
· Curing
§ Subbase material
§ thickness
§ Edge support – new arboretum trails
§ Formwork
o Mix Design & Testing
§ Materials – w/cm, aggregates, geotextile, admixtures, SCM, curing
· Water
· cm – Portland I, II
· w/cm = approx. 0.30
· SCM
· Example Mix Proportions
· Aggregates
o Minimum fine aggregate
o Uniformly graded coarse aggregate
o Reliable Aggregate supply
· Geotextile
o Thickness, weight – examples – recycled plastic fibers
o Coverage – bottom, sides
· Admixtures
o Hydration Stabilizer
o MWRA
o
o Quality Assurance
§ Unit weight test
§ Infiltration test
§ Strength testing research
Reference Links:
Florida
Georgia Storm Water Management Manual http://www.georgiastormwater.com/
EPA Storm Water Management Model(SWMM5): http://www.epa.gov/nrmrl/wswrd/wq/models/swmm/
PCSWMM 2011, Stormwater Management, Wastewater and Watershed Modeling Software:
Pervious Concrete Pavements: http://www.perviouspavement.org/index.html
Portland Cement Association PCA, Southeast Region - http://www.pervious.info/