INDOT has let and constructed numerous projects over the past 2 years utilizing signifi-cantly revised partial-depth patching tech-niques. This presentation will provide an update regarding the construction and performance of new practices

Nelson, Mike

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Michael Nelson, PEConcrete EngineerINDOT Office of Materials Managementmnelson@indot.in.govMarch 10, 2020BackgroundPartial Depth Joint Repair• Started at MnDOT• Shallow repair (top of slab)• Longitudinal joints• Transverse joints• Corner breaks• Minimalistic approach• Labor intensive• Details matter!!Partial Depth Joint RepairTypical DistressTypical Joint DeteriorationWeiss & Nantung, 2007INDOT Contracts Total contracts - 48*Crawfordsville  - 5Ft. Wayne - 6 Greenfield - 12 LaPorte - 10Seymour - 9 Vincennes - 4 *Lettings 2017 thru March 2020 13531111212212123221 311111111Partial Depth Joint RepairOctober 2016                            I-465 Placed  October 2016Custom mix design (OPCC)July 2019                            September 2018Partial Depth Joint RepairSR62  Placed 2017 (3U18 Prepackaged)June 2019Partial Depth Joint RepairI-80 Placed  June 2017 (3U18 Prepackaged)                       June 2019              October 2019              Scoping??Select Good Typical dCandidaistress –tBaesd Choice Yes YesMaybeSelect Good Candidates (use pozzolans in new PCCP)Yes YesMaybePCCP w/Fly ash Plain PCCPice ??Avoid Bad CandidaTypical distresst es– Bad ChoTake cores if not surePicture by: G. Bruhn – MnDOTPicture by: G. Bruhn – MnDOTD - CrackingLessons Learned(so far)Unique Special Provision - Mix Options1)Prepackaged Concrete Patch Material, MnDOT 3U18 (3U18)2)Ordinary Portland cement based concrete (OPCC)3)Rapid hardening cement based concrete (RHCC)4)Latex Modified Concrete (LMC)5)Very Early Strength Latex Modified Concrete (VESLMC)6)Prepackaged Rapid Set Patching concrete (RSP)Unique Special Provision - Mix Options1)Prepackaged Concrete Patch Material, MnDOT 3U18 (3U18)2)Ordinary Portland cement based concrete (OPCC)3)Rapid hardening cement based concrete (RHCC)4)Latex Modified Concrete (LMC)5)Very Early Strength Latex Modified Concrete (VESLMC)6)Prepackaged Rapid Set Patching concrete (RSP)Fast Setting OptionsUnique Special Provision - Mix Options1)Prepackaged Concrete Patch Material, MnDOT 3U18 (3U18)2)Ordinary Portland cement based concrete (OPCC)3)Rapid hardening cement based concrete (RHCC)4)Latex Modified Concrete (LMC)5)Very Early Strength Latex Modified Concrete (VESLMC)6)Prepackaged Rapid Set Patching concrete (RSP)Options being used on INDOT contracts• All methods work• All are susceptible to problems if not properly installedUnique Special Provision - Mix OptionsPrepackaged Concrete Patch material, MnDOT 3U18 (option #1)• ProSpec 3U18by TCC Materials                                                             • ProSpec 3U58 (previously 3U18M)• Same gradation• Air entrained with superplasticizer• Higher slump (4”-6” vs 1” for 3U18)• Will be added to new spec(old packaging)Unique Special Provision - Mix OptionsRapid setting patch materials (option #6) • Follow manufacturer’s recommendationsFasTrac 246 tech data sheet (Western Materials)“Protect finished concrete from rapid moisture loss by covering with plastic or curing blankets, or cover with wet burlap.  Do not use wax-based curing compounds.” • Use PAMS curing compound• PAMS = Poly Alpha-methylstyrene• INDOT is drafting a standard specification• Apply as soon as possible!Achieve a Good Bond• Prepared surface must be clean!!!• Mist ahead of placement• Scrub coat – use stiff bristle brush• No water blasting in lieu of sand blasting• Don’t allow bond coat to dry• Must reclean and sand blastAchieve a Good BondBonding problemsCompression ReliefTransverse jointCompression ReliefSawing vs. compression material (Depth?)Compression ReliefWhat’s missing??Compression / Bonding ?Placed 2017 –pictures June 2019Careful Stretching the BudgetI-802.5 years after joint repairAdditional deteriorationCold Weather• Pavement & ambient temps above 50 degrees• Placement prior to October 24th• Fall may be more forgiving due to warmer pavement temps• Don’t even try in winter/spring until pavement warms• Blankets won’t be enough to help• Rapid set mixes won’t workVES-LMC did not setPlaced 12-7-19Pics 12-8-19Placement temp: 35-42 degreesOvernight low: 33 degreesClosing Thoughts• Good repair methodology INDOT • Good work for industry• Need feedback (good, bad and ugly)• It can only be successful with attention to detailThank You !Michael Nelson, PEINDOT Office of Materials Managementmnelson@indot.in.gov317-522-9685

Update on Partial Depth Patching Techniques for Concrete Pavement

https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=4443&amp;context=roadschool

Update on Partial Depth Patching Techniques for Concrete Pavement

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