Murphy Flynn Construction Manager FAA National Airport Pavement Test Facility

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2. Twisting Monitoring at NAPTF. Initial three solid test things assembled in 1999 fizzled rashly from corner cracksInvestigation into piece twisting started in 2000

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30 th Annual Airport Conference Hershey, Pennsylvania March 7, 2007 Murphy Flynn Construction Manager FAA National Airport Pavement Test Facility 1

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Curling Monitoring at NAPTF First three solid test things worked in 1999 bombed rashly from corner splits Investigation into section twisting started in 2000 – decide reason for inordinate piece twist inside at NAPTF Various activities more than quite a long while PCC Mix outline Slab measurements Moisture and temperature 2

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Twin Slab Project Two single chunks put and instrumented in October 2005 Indoor piece Outdoor chunk Sensors CSG's 36 Vertical Displacement 18 Thermistors 18 Relative Humidity 6 Embedment 10 Total 88 3

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Typical section focus sensors 4

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Finished Indoor Slab 5

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Finished Outdoor Slab 6

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Results from Twin Slab Experiment Instrumentation demonstrated pieces corners isolating from balanced out base Indoor chunk twisted roughly 200 mils at pinnacle Outdoor piece twisted around 90 mils at pinnacle Seasonal varieties and every day varieties saw in both chunks Multi year checking proceeds with 7

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Results from Twin Slab Moisture slope is the essential element making piece twist Temperature inclination was a minor auxiliary impact Developed framework for wet curing indoor sections of test things to forestall early age twisting Developed a framework to occasionally apply water to indoor solid test things to control long haul twisting and decrease corner breaking Effectively lessened twisting to 20 mils or less 8

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Curling Monitoring Atlanta Hartsfield-Jackson International Airport 9

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Curling Monitoring at Atlanta Hartsfield-Jackson International Airport Objectives: to quantify chunk twisting anxieties and vertical section/base detachment in the field look at chunk conduct recorded at the NAPTF to conduct of genuine landing strip sections Eventually incorporate section twisting impacts in disappointment models 10

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Atlanta Taxiway E Instrumented Pavement Project Three PCC pieces were instrumented amid the recreation of RWY 8R-26L and parallel TWY E Sensors were introduced Oct. 16-18, 2006; Concrete was set Oct. 18, 2006 Instrumentation must be more strong than those utilized at NAPTF 11

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Atlanta - Project Location RWY 8L – 26R RWY 8R – 26L ACCESS ROAD TWY E 12

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Atlanta Taxiway E – Instrumented Slabs Location 13

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Atlanta Taxiway E Sensor Installation Sept./Oct. 2006 24

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Automated Data Acquisition System Initial information procured physically. Changeless information securing framework will be introduced late March. Framework trialed at FAA Tech Center Panasonic Tough Book portable workstation Cellular modem IO Tech Data Acquisition System Mitsubishi Programmable Logic Controller 25

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Remote Power Supply Power supply trial set up at FAA Tech Center 4 – 120 Watt sun oriented boards 400 Watt wind generator Power to be mounted close information gathering bureau 26

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Concrete Research 27

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Innovative Pavement Research Foundation (IPRF) FAA has cooperated with industry to concentrate on Concrete research for runways Program built up 2001. Helpful Agreement with FAA. P.I.: Gerald Voigt, ACPA IPRF Program Manager: Jim Lafrenz FAA Program Manager: David Brill Research is financed 100% through FAA awards. Activities are observed by IPRF Technical Panels. Board individuals incorporate FAA and outside specialists. More data: 28

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IPRF Projects 04-2 and 06-3: Concrete Overlay Parameters NAPTF Construction Cycle 4 (CC4). Extend performed at NAPTF by Quality Engineering Solutions (QES) under contract to IPRF. QES composed & built 3 test things on ostensible 8 CBR subgrade (300 LF add up to). QES is in charge of observing the tests, does all examination & readies the last report. Under terms of the Cooperative Agreement with IPRF, the FAA arranged the subgrade, performed plate stack tests & worked test vehicle per QES arranges.. Last trafficking of CC4 test things occurred on 10/3/06. Get ready for 2007-8 is for QES to perform Phase B testing on reproduced overlays utilizing IPRF FY06 reserves. Stores: Phase A (04-2): $900K Phase B (06-3): $900K 29

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CC4 Test Item Profiles WEST EAST 30

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IPRF Project 02-04: Airfield Pavement Smoothness Criteria Comparative investigation of "off-the-shelf" asphalt smoothness estimation hardware, innovation and records. Characterize proper smoothness criteria to be utilized for acknowledgment, recovery. Restricted to PCC asphalts. Contractual worker: APR Consultants, Inc. Stores: $262K Final report accessible 2007. 31

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IPRF Project 03-01: Design and Construction Guide for in Pavement Lighting Best Practices record. Addresses clashing prerequisites between structural building and electrical designing points of interest. Outline of practices that outcome in palatable establishments bringing about negligible support necessities. Contractual worker: Burns Engineering Funds: $106K Final report accessible 2007 32

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IPRF Project 04-01: Develop a New Airfield Concrete Pavement Specification IPRF will make proposals to FAA for refresh to Item P-501, Portland Cement Concrete Pavement. Address all zones of current spec, including solid blend plan; gear; solid situation; opening necessities, and so on. Accentuation on final result prerequisites. Temporary worker: CTL Group Funds: $411K Final IPRF report & proposed particular: 2007 33

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Alkali-Silica Reactivity (ASR) Research Program What is ASR? A compound response that happens when silica in the total and soluble base in the concrete respond within the sight of water. The response item is a gel that assimilates water and swells, bringing on breaking. Potential bothers incorporate broke and misaligned sections. There may likewise be an expanded FOD risk. ASR is turning out to be progressively perceived as an issue at airplane terminals. 34

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IPRF Project 04-6: Lithium Admixtures and Properties of Early Age Concrete Project contemplated properties of plastic and early-age solidified creation concrete treated with lithium nitrate (LiNO 3 ) as an admixture. Consolidated field testing with research facility examinations. Taken a gander at solid properties including: Air substance and unit weight, workability, quality (compressive and flexural), shrinkage, development. Conclusions: No noteworthy impacts on early-age properties at the prescribed measurement. Some measurably huge impacts (e.g., lessening in 28-day compressive quality) found at 2 – 4 times prescribed measurements. In light of results, keep 100% measurement as suggested greatest. 35

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IPRF Project 03-10: Topical Application of Lithium 5-year field ponder, $630,000. Contractual worker is Vector Corrosion Technologies. 3 U.S. Airplane terminals examined: Cheyenne, Wyoming Phoenix, Arizona Atlanta, Georgia Investigating utilization of topical lithium treatment to relieve/impede ASR harm. Test Area at Cheyenne Regional Airport (TWY B) Lithium Application at Cheyenne Airport 36

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IPRF Projects 03-9 and 04-8: ASR and De-Icing Chemicals Alkali-bearing chemicals are generally utilized as hostile to icing and ice liquefying specialists at air terminals: Potassium acetic acid derivation (KAc) and sodium acetic acid derivation (NaAc) Sodium formate (Used in Europe however not normal on the U.S.) U.S. air terminals watched that deicers appeared to add to a quick increment in ASR movement. FAA supported an IPRF venture to decide the seriousness of this wonder. assess methods for relief. Between time test methodology Modified ASTM 1260 (mortar bar) test. 37

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Guidance on Mitigating ASR FAA Guidance ( terminals/development/) : Advisory Circular 150/5380-8, Handbook for Identification of Alkali-Silica Reactivity in Airfield Pavements Engineering Brief No. 70, Accelerated Alkali-Silica Reactivity in Portland bond solid asphalts presented to runway deicing chemicals . Interval proposals from IPRF deicer ponder. IPRF Reports ( ) : Test Method to Assess Potential Reactivity of Aggregates in Presence of Airfield Deicing Chemicals (Mortar Bar Test) Lithium Admixtures (LiNO3) And Properties of Early Age Concrete. 38

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Hot Mix Asphalt Research 39

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Bridging the Gap FAA concentrate in progress to bring Superpave strategy into vast business airplane terminal HMA Goal: Develop a determination that will create proportional or preferred HMA over flow P-401 Marshall blends Marshall blends have been performing great Currently utilize PG covers FAA P-401 degrees coordinate nearly to Superpave prerequisites 40

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Current FAA HMA Specifications ENGINEERING BRIEF NO. 59A "Thing P‑401 PLANT MIX BITUMINOUS PAVEMENTS (SUPERPAVE  )" Purpose : give direction on utilizing asphaltic solid blends planned with Superpave (gyratory) procedures. Accessible online at: terminals/development/engineering_briefs/41

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Engineering Brief 59A Currently permits the utilization of Superpave blends on air terminals with gross flying machine weights of 100,000 lbs. on the other hand less Requires blend to be created utilizing 100 gyrations for N des Use PG cover suggested by nearby Department of Transportation 42

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FAA Study Phase I Phase I: Study will deliver a grid of blends utilizing both Marshall blend outline and Superpave blend plan Matrix will include: Various total geographies Limestone Basalt Granite Etc. 43

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FAA Study Phase I Matrix will incorporate: Various black-top fasteners PG 64-22 PG 70-22 PG 76-22 (Polymer Modified Binders) 44

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FAA Study Phase I Compare volumetrics of blends Measure volumetrics at 75 blow Marshall pound (current FAA spec.) Measure volumetrics at different compaction level