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Guidelines for Use of Highway Specifications for Airport Pavements

Bob Boyer, PhD, PE – Airport Pavement Consultant

Mark Buncher, PhD, PE – Director Engineering, Asphalt Institute

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HW Specs For HMA Airport Pavement

PROJECT OVERVIEW[AAPTP Project 06-05]

•DELIVERABLE: Comprehensive Guide for Practicing Airport Designers

How to Modify SSHP Specs For Acceptable SSAP Specs for HMA Projects

[<60,000# Aircraft Gross Weight]

•FINAL REPORT – May, 2009 Available at www.aaptp.us

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HW Specs For HMA Airport PavementDEFINITIONS

“State Standard Highway Pavement (SSHP)” specifications – SSHP specifications is used throughout this document to identify the current State specifications for HMA highway pavements covering materials, mix design and selection, manufacture, transport, placement, compaction and acceptance of HMA pavement as well as the contractor’s quality control plan and requirements.

“State Standard Specifications Manual (SSSM)” - SSSM is used throughout this document to identify the current edition of the State Standard Specifications of Highway Construction, State Standard Specifications for Transportation Systems, State Standard Specification for Road and Bridge Construction, or any other title used for a SSSM.

“State Standard Airport Pavement (SSAP)” specifications – SSAP specifications is used throughout this document to identify a State specifications for HMA airport pavements developed in accordance with the guidance provided by AC 150/5100-13A and submitted for FAA approval. The SSAP must comply with critical requirements for airport pavements and instructions on how to reference, or insert, portions of SSHP specifications.

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HW Specs For HMA Airport PavementUsing SSHP Specifications

VS

FAA Item P-401 or P-401 (SP) Specifications

•CONSIDERATIONS: GA PAVEMENT <60,000#Low Traffic Volume Distress Types: Almost Exclusively EnvironmentalForeign Object Damage (FOD)

•BENEFITSHigh Quality Construction [Familiarity]More Economical Pavement [vs P-401]Long Term Performance [Updated Technology]

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HW Specs For HMA Airport Pavement

BACKGROUND

•REVIEW SPECIFICATIONSSSHP Specifications FAA AC 150/5370-6D [P-401, P-401(SP), P-403]FAA AC 150/5100-13A Dev State Standards Non Primary

•CONDUCT INTERVIEWSFAA Region EngineersState Aviation Offices

•PUBLIC LAW [TITLE 49 U.S. CODE 47114(d)(5)]2000 [TITLE 49 U.S. CODE 47105(C)] 2005

[……...FAA ORDERS (5300.1F)]

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HW Specs For HMA Airport PavementCONCERNS

•LIABILITY-10-Year Federal Funding Moratorium

•MODIFICATION TO STANDARD- No Motivation to Deviate from P-401

•PERFORMANCE-Meet FAA P-401 or P-401 (SP) Proven Quality

-Requirementso Owner QAo Joint Densityo Grade/Smoothness

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HW Specs For HMA Airport PavementAPPROACH

Draft FAA Engineering Brief (EB)oInterim Guidance to Develop SSAP SpecsoOptimize Use of SSHP Specs [Provisions]oComply with All SSSM Sections, as Applicable

FOR

Aircraft Gross Weight , <60,000#

AND

Address Critical Elements for Airfield PavementsEmploy Marshall and/or Superpave Mixtures

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Draft EB-XX – “The Guideline”SSAP CHECKLIST FORMAT [for EB]

•Description & Traffic•Materials•Composition•Construction•Acceptance•Quality Control•Measurement•Payment

Follows Format of Most State Specifications

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Draft EB-XX – “The Guideline”Description & Traffic

•Description– Definition, Explanations, Etc.– Terminology – Examples

• Department/Airport Manager• Engineer/Airport Owner, or OAR• Roadway/Airport Pavement

•Traffic - Table 1.docxTraffic Level Million ESALs Aircraft Gross Weight, (#)

A <0.3 <12,500

B 0.3 to <3.0 12,500 to <60,000

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Draft EB-XX – “The Guideline”Materials

•General Requirements– Aggregates

• SSHP/SSSM, as applicable

– Asphalt Binder• AASHTO M-320 [Performance Grade]• Any additional SSHP, or SSSM Requirements• Normally State DOT Standard Grade• Grade Bump for Traffic Level B

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Draft EB-XX – “The Guideline”Mix Composition

If State Spec Uses Marshall• 50 Blows for Traffic Level A or B• Gradation: use P-401 or P-403 [Bands]

If State Spec Uses Superpave• 50 gyrations (Traffic Lev A) or 65 gyrations (Traffic Lev B)• Gradation: AASHTO M-323 [Control Points]

Mix Selection• Base/Intermediate Course: 37mm, 25mm or 19mm• Leveling Course: 12.5mm or 9.5mm• Surface Course: Fine-graded only 19mm or 12.5mm

RAP Limits (per AAPTP 05-06)• 15-30% depending on whether surface or base mix, and on

recovered PG grade of RAP binderJMF Submittal Requirements

• SSHP Specs sufficient

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Draft EB-XX – “The Guideline”Construction

Plants and equipment• Rely on SSHP spec

Mandatory test section requirements• On initial production lot of SSHP

Grooving criteria (if shown on plans)• ¼” wide x ¼” deep at 1.5” c-c spacing• Amend SSHP

High quality longitudinal joints a must!• Amend SSHP for joint density

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Draft EB-XX – “The Guideline”Material Acceptance

All Acceptance and Sampling and Testing Must Be Accomplished By the Owner, Separate From the Contractor’s QC

Plant Produced Material (PPM)• PPM – Pass #8 Sieve [Optional]• PPM – Pass #200 Sieve [Optional]• PPM - Air Voids [Mandatory]

Field Placed Material (FPM)• FPM – Mat Density [Mandatory]• FPM - Joint Density [Mandatory]• FPM – Thickness [Optional]• FPM – Grade [Mandatory]• FPM – Smoothness [Mandatory]

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Draft EB-XX – “The Guideline”Contractor Quality Control

•QC Program

•Laboratory Facility [ASTM D3666]

•Quality Control Testing– AC%, Gradations, Moisture Contents,

Etc.

•Control Charts

IAW SSHP Specs & SSSM

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Draft EB-XX – “The Guideline”

Measurement

•Measured by # of Tons HMA

•Measured on Accepted Work

•Or IAW Other Measurement Specified by SSHP, or Other Sections Referenced in SSSM

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Draft EB-XX – “The Guideline”Payment

•Payment – IAW Unit Price X Measurement Unit & IAW Mandatory Items

•Total Project Payment–Not to Exceed 100% of Total–May be used as Offset Lot to Lot

•PWL: Not Mandatory Requirement

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Draft EB-XX – “The Guideline”SSAP CHECKLIST FORMAT [for EB]

[SUMMARY]•Description & Traffic•Materials•Composition•Construction•Acceptance•Quality Control•Measurement•Payment

Follows Format of Most State Specifications

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Draft EB Refined and Validated

• 10 Different State Test Cases– AI Regional Engineers developed SSAP specs by

applying the Draft EB to their respective SSHP spec

• Draft EB improved & validated thru this process• SSAPs were developed for:

– FL, MN, PA, TX, VA, CA, MT, OH, WA, MO• In Appendices of Final Report• Not official SSAPs, but examples

• Final Report Documents Project [www.aaptp.us]– 58 pages total

• Last 17 pgs is the Final Draft FAA Engineering Brief

– Appendices are several hundred pages

AI Regional Engineer Offices & Guideline Validation

HawaiiHawaii

Bob Humer

Sandy Brown

Bob Horan

Danny Gierhart

Wayne Jones

AlaskaAlaska

Mark Buncher, AI HQ

Mark Blow

Dave Johnson

Carlos Rosenberger

Bob Boyer, AI Ret

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4/15/20101/10/2010 2020

AAPTP Project 06-05, Guidelines for Use of Highway Specifications for Airport

Pavements

Draft EB-XX

“The Guideline”

For <60,000# AGW

Questions????

Bob Boyer, PhD, PE – Airport Pavement Consultant

Mark Buncher, PhD, PE – Director Engineering, Asphalt Institute