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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