NSC Pervious Pavement Demonstration Grant

MECA

March 4, 2011

Ponding problem in a corner of a SuperRink parking lot.

The Beginning

October 6, 2009

Then

National Sports Center, Blaine, applied for $3000 Demonstration Grant from CCWD to install pervious concrete.

1st InstallOctober 7-9, 2009

1st InstallOctober 7-9, 2009

1st Install - curingOctober 15, 2009

Inspection

4.5 Months later

Raveling

Raveling along turning radius

1. Next Steps–Informal Infil Test

March 18, 2010

1. Infil Results

2. Next Steps-Meeting Onsite

April 1, 2010 CCWDNSCContractors

Cemstone – product supplierHalvorson - installerAggregate & Ready Mix Assoc of MN

3. Next Step-Determining Cause

Site

Core 2

Core 1

AnalysisCore 1 Core 2

1

2

Findings Core 1 Core 2

Both cores exhibited fracturing

Findings

Carbonation in both cores

Core 2Core 1

4. Conclusions

Vehicle load accelerated raveling did not cause failure

High carbonation = lack of “curing” = weakened material

Lack of “curing” caused by cool temperatures after the pour (October)

5. Decision Re-install in warmer weather

2nd Install

August 25, 2010 Cost split amongst contractors, NSC

2.5 Weeks later

September 13, 2010

Maintenance

Cooperation with neighbor Blaine PW

Weekly

2011 – 5.5 months later

The Plot Thickens

more raveling

Next Step - Repeat Infil Test

Vehicle loading

again!

Nearby Comparison

Blaine Public Works – 2008 install¼ mile from NSC site

Pervious Concrete Pervious Asphalt

Infiltration Results

Defining Pervious “Failure”

Lack of infiltration?

Role of appearance?Raveling

Seam Deterioration

Blaine Public Works

Next Steps Repeat Process

Onsite Meeting Involved parties

"Successperts" Mark Maloney-Shoreview Len Palek-MNDOT

Jon Lee-Cemstone Mary Vancura-MS research

Next Steps Re-determine Cause

Explore Solutions

Re-install pervious concrete

Replace w/ pervious asphalt

Other -TBD

Patch repair

Lessons Learned

1. Timing of pour MN curing completed by mid-September

Original hypothesis

probably still good practice

Lessons Learned

2. Communication Work through problems/solutions with

all parties involved

Lessons Learned

3. Issues?

One week after 2nd install

Thank You

Acknowledgements:

TJ Helgeson, CCWD

Tom Gile, CCWD