Indiana has designed, bid, and built multiple thin fiber-reinforced concrete overlay across the state. This presentation provides a recap of lessons learned from the near 1.5 million sys of thin PCC overlay projects built

Holtz, David B.

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INDOT’s Recap of Thin Concrete Overlay Test ProgramLessons Learned To DateDavid B. Holtz, P.E.Pavement Director, INDOT2019 Purdue Road School06 March 2019 Construction damage People do what people doSR 55 Six district offices 3,500 employees $1 billion/annual capital expenditures 28,000(+)  lane-miles Nearly 6,000 INDOT-owned bridges Assists 42 railroads in planning & development of more than 3,880 miles of active rail lines Supports 69 Indiana State Aviation System Plan airportsINDOT ProfileIn 1818 the Institution of Civil Engineers was founded in London, and in 1820 the eminent engineer Thomas Telford became its first president.  The institution received a Royal Charter in 1828, formally recognizing civil engineering as a profession.  Its charter defined civil engineering as:The art of directing the great sources of power in nature for theuse and convenience of man, as the means of production and oftraffic in states, both for external and internal trade, as appliedin the construction of roads, bridges, aqueducts, canals, rivernavigation and docks for internal intercourse and exchange, andin the construction of ports, harbors, moles, breakwaters andlighthouses, and in the art of navigation by artificial power forthe purposes of commerce, and in the construction andapplication of machinery, and in the drainage of cities and towns.Institution of Civil Engineers, 1 Great George Str, Westminster, LondonEngineering PhilosophyThe StageAtherton J S (2011) Learning and Teaching; Bloom's taxonomy [On-line: UK] retrieved 27 February 2013 from http://www.learningandteaching.info/learning/bloomtax.htmThe StageEvaluationSynthesisUniversalIntellectualStandardsTesting the quality of your thinking. . .Critical Reasoning Concepts & Tools, Paul & Elder, Foundation for Critical Thinking- Clarity- Accuracy- Precision- Relevance- Depth- Breadth- Logic- Significance- FairnessA good start…What standards might you add for your discipline?We reasonfor apurpose;and from apoint of view.which is based onassumptions;havingimplicationsandconsequences;We useinformation;we drawinferencesandconclusions;to answer aquestionor solve aproblem;weexamineconceptsandtheories;ElementsofReasoningTakingthinkingapart . . .Critical Reasoning Concepts & Tools, Paul & Elder, Foundation for Critical ThinkingThin PCCP Overlays – Current Status Test projects currently completed, under construction, or being let Project pavement condition data collection scheduled for summer CY2018/19 ‘Initial’ data collection to be upon project completion Projects’ on-going data collection to be annual Project cost data being analyzed at this time Final cost data for test immediately follow Program decisions to be made when appropriate Initial assessment: Costs higher than planning level estimates Construction quality appears mostly higher than expectedThin PCCP Overlays – Concept Timeline 2010 - 1st INDOT TCO constructed on SR 161 2012 - INDOT’s current pavement organization generated 2015 - 2nd INDOT TCO constructed: SR 55 June 2015 - TCO programmatic interest initiated Summer 2015 - TCO performance investigations Multiple design methods w/multiple performance expectations Fall 2015 Existing TCO pavement condition data collection plan executed Design method resolved later in CY2015Thin PCCP Overlays – Concept Timeline CY2016 INDOT guidance to investigate conducting multiple test projects Candidate project criteria developed Project pavement design criteria developed Construction considerations determined Unique special provision developed 10 projects designed CY2017 - Most test projects letThin PCCP Overlays – Concept Timeline CY2018 Construction on multiple projects CY2019 Multiple projects completed and being assessed.And Here We Are Today!Thin PCCP Overlays - Candidate projects SEYMOUR: SR 46, Columbus to Nashville US 50, Aurora to end of 4-Ln Section SR 37, I-69 to Dillman Rd. US 50, City of Seymour CRAWFORDSVILLE: US 52, Teal Rd. to CR 800S SR 63, Vermillion Co. US 421, Kirklin to SR 29 US 36, Wabash River to US 41 VINCENNES: SR 66, Rockport to SR 70 SR 65, SR 165 to SR 65 41 SR 161, SR 68 to HollandThin PCCP Overlays - Candidate projects LAPORTE:  SR 14, US 35 to SR 17 SR 18, Brookston to US 421 SR 55, SR 14 to SR 10 GREENFIELD:  SR 234, ST 109 to SR 38 SR 3, CR 300 North to SR 67 US 31, SR 38 to SR 28 US 31, 3 mi. S of US 24 to 0.5 mi S of US 24 FORT WAYNE:  SR 101, US 24 to Allen/Decatur Co Ln SR 9, SR 26 to SR 37 US 20, 1 mi. E of US 27 to IN-OH St LnCandidate Criteria MOT & CN trafficability 1 Ln? Echeloned closure? NLT 4 inch HMAP needed under TCO Sound HMAP necessary, NLT 4” or thinner if on composite pavement NLT 3 inch sound HMAP necessary Full-depth patching accomplished if necessarySR 9 Full closure Early test Looks good in most places Some issues Construction issues will be monitoredSR 55Design Considerations Expansion joints & gap pours Isolation & CN Joints Drives Drainage Bound Open-Graded Shoulder Drains? Milling Upper half of criteria (screening criteria) May replace 1 or 2-lift HMAP overlay or inlay Gap pours at drives and intersectionsSR 55SR 9 Texture of underlying pavement important consideration Mechanistic-Empirical Pavement Design Guide (M-EPDG) philosophyCurrent Pavement Asset Management PracticeDesign Considerations Profile Re-establishment Crown Re-establishment Centerline or Edge Rumble Stipes Safety Edge Method of Payment Neat lines plus variable “Filet” vs. SYDs Edge support Appearances can be deceivingSR 9 Underlying pavement surface texture Construction jointSR 3Construction Considerations Weather Maintenance of traffic Paver width, construction operations Real time smoothness Centerline profile Low and high speed Safety Edge support & constructability Sawing, sealing & curing Maintenance of traffic Flexibility due to panel sizeSR 3SR 9 Moister management considerations criticalSR 9 Due to composite nature, surface preparation is criticalSR 161 Note inlay methodSR 9 Edge support condition is critical design considerationSR 9 Material properties and ramifications Importance of contractor’s QC plan review AND ADHERENCE! This was later in projectSR 55 Curing methodSR 3 Curing methodSR 3 Finished surface Note fibers Note curing compoundSR 3Specification Considerations “Filet” payment Thickness bonus Fibers Dip stick thickness measurement? Pavement profile QC / QA Milling & existing surface cleaning Pre-overlay repairs Concrete placement, curing & sawing Use of fibersSR 3 Sawing operations are critical! Contractor’s experience and QC plan must be discussed prior to constructionSR 9Thin PCCP Overlays – Current Status Test projects completed, currently under or completed ‘Initial’ data collection to be upon project completion (CY2018/19) Projects’ on-going data collection to be annual Final Project cost data to be analyzed Final cost data for test immediately follow Final assessment: TBD Program decisions to be made when appropriate INDOT will continue to examine TCO as another pavement preservation tool in our tool box Strong executive interest in challenging SR 3 projectCost comparison½ of cost comparison considerationsOther half will be in-service field life of treatmentFinalQuestions?

INDOT\u27s Recap of Thin Concrete Overlay Test Program Lessons Learned To Date

https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=4389&amp;context=roadschool

INDOT\u27s Recap of Thin Concrete Overlay Test Program Lessons Learned To Date

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