Pervious Pavement Webinar Speaker: Christy Martin, Executive - - PowerPoint PPT Presentation

Pervious Pavement Webinar

Speaker:

Christy Martin, Executive Director Concrete Promotional Group, Inc.

Moderator:

Ryan Hamel Small Business Environmental Assistance Program Kansas State University

Funding provided in part through U.S. EPA Section 319 Nonpoint Source Pollution Control Grant No. C9007405-08 administered by the Kansas Department of Health and Environment – Bureau of Water

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Kansas Small Business Environmental Assistance Program

Environmental compliance assistance

 Multimedia (air, waste, water, energy, GHG

inventory and reporting, EMS)

 WRAPS service provider  Free to small- and medium- sized

businesses (KDHE funded)

 Confidential  Staff located throughout the state

Contact Information: Web site: www.sbeap.org Hotline: 1-800-578-8898 Email: sbeap@ksu.edu

How it all fits… Kansas State University

College of Engineering

Engineering Extension

Pollution Prevention Institute (PPI)

• Small Business Environmental Assistance Program (SBEAP)

Pervious Concrete Pavements for Stormwater Mitigation

Soil Subbase Gravel Base Pervious Concrete Rain, Snow, Ice Geotextile Fabric

Pervious Concrete Pavement System

• Pervious concrete is a mixture of coarse aggregate, Portland cement, water,

and little to no sand. A typical pervious concrete pavement has a 15-25% void structure and allows 3-8 gallons of water per minute to pass through each square foot.

• Carefully controlled amounts of water and cementitious materials are used to

create a paste that forms a thick coating around aggregate particles. Using just enough paste to coat the particles maintains a system of interconnected voids.

• The result is a very high permeability concrete that drains quickly. Due to the

high void content, pervious concrete is also lightweight, 100 to 120 lb/ft3.

• After placement, pervious concrete resembles popcorn. Its low paste content

and low fine aggregate content make the mixture coarse, with a very low slump. The compressive strength of pervious concrete is limited since the void content is so high. However, compressive strengths of 2000 psi to 4000 psi are typical and sufficient for most applications.

What is Pervious Concrete?

• EPA, Phase II Directives, NPDES
• Vertical Drainage vs. Horizontal Run-Off
• Best Management Practice (BMP)
• Drain Invert Filtration Systems – ELIMINATED
• First Flush Pollution Mitigation – 90% of pollutants typically

in Run-Off from the first ½” of rainfall

• Add’l land purchase for detention ponds – NOT NEEDED
• Air & Water get to tree roots & other vegetation
• Pervious Concrete is a sustainable – green product
• PC assists in gaining up to 3 LEED credit points
• Parking Lot serves 3 purposes:

1) Parking Lot 2) Temporary Detention 3) Water Filtration

Why Use Pervious Concrete Pavements?

Pervious Concrete water passes at 3 - 5 gallons per min. per sq. ft.

• r

270 - 450 in. per hr.

Water Disappears Quickly

• Parking Areas
• Driveways
• Sidewalks
• Roadways
• Swales & Ditches
• Erosion Control
• Slope Protection
• More

Pervious Concrete Applications

Freeze/Thaw Concerns ?

Why do water pipes burst in cold weather? Freeze/Thaw Study What will happen to these water bottles if left in a freezer a little longer? What would happen if the lids were taken off first before placing them in the freezer?

Freeze/Thaw Concerns ?

All exterior concrete flatwork must have air entrained to the mix before it is placed to survive freeze/thaw conditions These pictures are concrete with no air entrainment

Air Entrained Concrete

Without air With air Cement content

222 kg/m3

(375 lb/yd3)

306 kg/m3

(515 lb/yd3)

392 kg/m3

(660 lb/yd3) Air entrained concrete places microscopic voids throughout the concrete matrix to allow room for water to freeze & expand without tearing up the concrete!

Freeze/Thaw Concerns?

• Pervious Concrete has air entrainment to protect the concrete

at the mortar level (in the paste)

• Pervious Concrete has air voids so large by nature you can see

them

• If water were to remain in the Pervious Concrete layer, there

is plenty of room for water to expand 9% & not hurt the concrete

• In most cases Pervious Concrete is more Freeze/Thaw friendly

than regular concrete

• Pervious Concrete has a base layer to allow the water to pass

through and be retained in that base layer keeping the water away from the riding surface of Pervious

Clay Soil Concerns?

Soil Subbase Gravel Base Pervious Concrete Rain, Snow, Ice Geotextile Fabric

• 1. Research and experience show

us that water sitting in a base layer in clay soil conditions, typically looses ½ to 1 inch of water a day.

• 2. The Gravel Base Layer is

adjustable! Reduce or increase the thickness depending on water retention needs. Calculate the typical rain event then calculate the volume the base layer will handle. This is CLEAN ROCK typically ¾ in. up to 1 ½ in. Less than 2% on the #200 sieve.

• Portland Cement 500 - 600 lbs.

ASTM C-150 – Type I or II Supplementary Cementious Mat’ls (Optional) Fly Ash Class C or F and/or Slag

• Coarse Aggregates typically ½” to 3/8”

> 2.5 specific gravity & < 2.5 absorption

• Fine Aggregates – Usually none

(Can have up to 6% sand in freeze-thaw markets for added durability)

• Fibers (optional)

Poly or Cellulose (No steel, no rebar or mesh)

• Admixtures

Water Reducers, Air Entraining Agents, HSA (hydration stabilizing admixture) Viscosity Modifying Admixture (optional)

• Water

w/c ratio of .27 - .33

Typical Mix Design – Generic with 15 – 25% Void Structure

Pervious Concrete Parking Lot Finley Football Stadium University of Tennessee Chattanooga

Pervious Concrete can be painted for parking stripes or handicap insignia

Pervious Concrete Sidewalk, placed in 2000 Owner: City of Olympia, WA 1500 lineal feet of sidewalk Sub-grade: native soil was permeable enough that an aggregate base was not needed Savings: $110,000 - land acquisition for detention ponds unnecessary

Testing Procedures: At this time there are no specific ASTM test procedures. ACI & ASTM are working on the Pervious Concrete Testing Procedures Unit Weight and Cured in Place Cored Cylinders are OK tests Specifications need to be very careful here. Advise to consult with John Kevern, UMKC

Pervious Concrete Certification is very important, please hire a Certified Ready Mix Company & Certified Contractor

Pavement Maintenance

Approximately once a year or as needed:

• Power Vacuuming
• Pressure Washing (Careful!)
• Combination of Both

Pervious Concrete Parking Lot Safeway Grocery Store Denver, CO Winter Placement, December 2004

Extremely Cold Weather Placement Careful! Can be done but needs extra special attention and should be avoided if possible

Pervious Parking Lot Placed during the Winter Denver, CO, placed

• Dec. 2004

Notice that when snow is walked on the snow disappears into the pavement below.

Pervious Concrete Parking Lot Denver – Next AM Following 12” Snow Sites directly across street from each other Photos: 5 min. differential max

Asphalt Lot across the street

Pervious Concrete Parking Lot & “Regular Concrete” Curb/Gutter & Sidewalk Notice the different pavements in the rain.

Mixed Concrete Products Pervious Concrete & “Conventional” Concrete To keep water out of storage units & mitigate stormwater management

Wal*Mart Pervious Concrete Parking Lot in McKinney, TX & Denver, CO

Slope Stabilization & Erosion Control Army Corps of Engineers Washington, MO

Decorative Pervious Concrete Driveway

Pervious Concrete Driveway

Pervious Concrete Tree Wells to get air & water to trees and for architectural beauty

Pervious Concrete Sidewalk

Pervious Concrete Parking Lot – Municipal Use City Park Parking Lot

Pervious Concrete Parking Lot Los Angeles, CA – Auto Auction Lot 90,000 sq. ft. of Pervious Parking

Pervious Concrete Parking Lot Tree Wells – Trees help it become a “COOL” pavement Trees & Plants get air & water through pervious pavements

Pervious Concrete Drive Lane Florida Shopping Center, Delivery Truck Drive Picture taken 12 yrs after placed

Pervious Concrete Parking Lot Tampa, Florida Aquarium - 8 years old

Pervious Concrete Parking Lot Brandon Regional Hospital Brandon, Florida Picture taken 14 yrs after placed

Pervious Concrete Pavements Big Jobs & Little Jobs

Pervious Concrete Parking Lot Rock base being delivered Placing on top of geotextile fabric

Pervious Concrete Parking Lot Clean Rock Base Placed over Geotextile Fabric Notice Curing Blankets in Background

Pervious Concrete Placement Telebelt Placement works nicely Pervious will not Pump!

Pervious Concrete Parking Lot Rock base being delivered Placing on top of geotech filter fabric Pervious Concrete delivered by Ready Mix Truck, transported by Telebelt, placed with roller screed, spray vegetable cure ready

Pervious Concrete Parking Lot I’Lan Park, Leawood, KS Telebelt placement Roller Screed, “Pizza Cutter”, Spray Cure, Poly Sheeting for curing

Curing Pervious Concrete

• Curing is Critical for Pervious!
• “If it dries it dies!”
• Failure to cure pervious will result in a failed

pavement.

• Curing needs to take place 3-5 minutes behind the
• screed. No exceptions.
• Curing involves spraying a soy bean oil immediately

behind the screed AND covering the pavement with 6 ml poly for 7 full days. The poly needs to be secured tightly! No wind blowing up under the poly ballooning the plastic!

Pervious Concrete Parking Lot Rock base being delivered Placing on top of geotech filter fabric Pervious Concrete Parking Lot I’Lan Park, Leawood, KS 6 mil poly sheeting secured for 7-day curing period

Pervious Concrete Parking Lot Side View after forms were taken off Pervious 8’ of pavement sitting on rock base

Pervious Concrete Parking Lot Rock base being delivered Placing on top of geotech filter fabric

Pervious Concrete Parking Lot I’Lan Park, Leawood, KS Placed March 2007 In September 2008 Awarded the Portland Cement Association’s National Sustainability Award for Sustainable Municipal Infrastructure

Decorative Pervious Concrete Merriam, KS

Decorative Pervious Concrete Water & Air to Tree Roots Merriam, KS

Southeast Elementary School Park Hill School District, MO Combination Lot

Oregon Trail Park Olathe, KS October 2008

Oregon Trail Park Olathe, KS ½ Poured a week ago ½ Poured today & covered to cure Poured in Strips

Discovery Center Kansas City, MO Pervious Sidewalk

Olathe, KS Pervious Concrete Parking Lot Lister Petter & Geiger Ready Mix

Olathe, KS Pervious Concrete Parking Lot Lister Petter & Geiger Ready Mix

Decorative Pervious Concrete gone wild! China, 2008 Olympics

Cost?

• Cost is what the market will bear for new emerging markets
• Southern Indiana where they are 10-12 years ahead of our markets they

are getting from $8.50 to $11.50 a square foot (turn key) for materials & labor installed start to finish. That is a huge variance, but there are factors that vary from job to job, such as excavation, layout restraints & accessibility, volume or total square footage, etc.

• The pervious concrete costs per yard range from 8-15% markup from

traditional concrete (admixtures)

• Remember it means not having to place & maintain a detention pond.

A recent job saved the owner $250,000 net, by not placing a detention pond and placing his parking lot with pervious instead.

• Typically pervious concrete parking lots as a stormwater system are

less costly when compared to having to purchase enough land to accommodate a detention pond, plus the cost of constructing & maintaining the detention pond and placing a parking lot

Review Pervious Concrete

• Stormwater Mitigation, Phase II
• Is a recognized “BMP”
• Green Building Product
• Helps attain up to 3 LEED Credits
• Parking Lots are multipurpose:

Temporary Detention Filters First Flush Parking fulfillment

• Supports local economy by

supporting local business

• Air & Water reach Trees & Plants
• Eliminates need for Detention Ponds
• Please Make sure Ready Mix

Producer & Contractor are Certified

www.nrmca.org

www.perviouspavement.org National Ready Mixed Concrete Association

www.concretepromotion.com

Concrete Promotional Group of Greater Kansas City Go to the Pervious Concrete Tab on the website:

• Pervious Certification Information
• Current list of Pervious Certified Technicians
• Picture story Pervious Concrete
• Pervious Concrete Resources
• Construction Checklist
• Coming in the near future…Pervious Specification

Other Pervious Contacts

Todd LaTorella, P.E. MO/KS American Concrete Pavement Association 913-381-2251 office phone John T. Kevern Ph. D., E. I. T. Assistant Professor UMKC School of Computing & Engineering 816-235-5977 office phone (One of the leading researchers on pervious concrete) Hundreds of websites – Search Pervious Concrete A dozen or so U-Tube mini movies & training videos

Christy Martin 913-341-5800 ph martinc@concretepromotion.com

Thank You