CPU 1 – Construction and Jointing Issues Part B ACPA Annual Meeting - November 29, 2018
BLOW-UPS: The Enigma of the Concrete Paving Industry Kevin W. McMullen, P.E. President Wisconsin Concrete Pavement Association ACPA Annual Meeting - November 29, 2018
Sometimes they can be extreme ACPA Annual Meeting - November 29, 2018
Most of the time they are very simple ACPA Annual Meeting - November 29, 2018
Definition: Types of Blow Ups Vaulting/Buckling Crushing JOINTED PLAIN CONCRETE PAVEMENTS
Definition: Types of Blow Ups CRCP CONTINUOUSLY REINFORCED CONCRETE PAVEMENTS
How Often Do They Occur In Wisconsin? ACPA Annual Meeting - November 29, 2018
2015 17 Locations Statewide ACPA Annual Meeting - November 29, 2018
2016 39 Locations Statewide ACPA Annual Meeting - November 29, 2018
2017 26 Locations Statewide ACPA Annual Meeting - November 29, 2018
2018 74 Locations Statewide ACPA Annual Meeting - November 29, 2018
Despite, what was just shown • Blow-ups are not common • Requires both high temperature (> 90 F) • Requires high moisture • Typically occurs in mid to late afternoon • Typically occurs in May/June within a week after rain • Tied concrete shoulders may reduce blow-up ACPA Annual Meeting - November 29, 2018
Despite, what was just shown • COMMON EXPLANATION - Incompressibles are presumably almost always involved—but not always…. • Occurring early in life, 4-8 years, is typically an initial construction issue. • Ocurring late in life, greater than 20 years, is typically a pavement condition issue ACPA Annual Meeting - November 29, 2018
Remember this photo? Damage to the joint has occurred prior to the blowup ACPA Annual Meeting - November 29, 2018
How is WCPA Working with WisDOT? • Encouraging more proactive pavement preservation/maintenance (fix the damaged pavement) • Implementing use of concrete/zero maintenance concrete shoulders on all interstate/freeway projects • MAY/JUNE of each year WCPA works with WisDOT to determine the key time for blowups to occur: – WisDOT puts county maintenance cre ws on alert/call – WisDOT issues press release ACPA Annual Meeting - November 29, 2018
How is WCPA Working with WisDOT? • Annual review of all locations. • New Wisconsin Highway Research Program project • Focus on pavement condition prior to blow up and amount of pavement impacted • Reaction and temporary repair efforts • Assuring permanent repair • Methods of permanent repair – Cast in place – Precast – Maintenance contract concept ACPA Annual Meeting - November 29, 2018
QUESTIONS? Kevin W. McMullen, P.E. President Wisconsin Concrete Pavement Association 4001 Nakoosa Trail, Suite 101 Madison, WI 53714 Email: kmcmullen@wisconcrete.org Phone: (608)240-1020 Mobil: (608)209-0878 ACPA Annual Meeting - November 29, 2018
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