NORTHEAST ASPHALT USER / PRODUCER GROUP NORTHEAST ASPHALT USER / - PowerPoint PPT Presentation

NORTHEAST ASPHALT USER / PRODUCER GROUP NORTHEAST ASPHALT USER / PRODUCER GROUP

Maryland Specification for Using Contractor and Agency Test Results in a Computer-based Pay Factor Program Larry Michael – MDSHA

• Maryland’s Goals • Maryland’s Goals • QC/QA Specification • QC/QA Specification • MarylandWare • MarylandWare • Pay Factor Program • Pay Factor Program • HMA View • HMA View • Pavement Tools Consortium • Pavement Tools Consortium

Maryland’s Goals Maryland’s Goals � Track HMA Projects � Track HMA Projects � Life Cycle Costs � Life Cycle Costs � QC/QA Specification Incorporating � QC/QA Specification Incorporating Contractor and State Results Contractor and State Results � Computer Based � Computer Based

QC/QA Specifications QC/QA Specifications • Mixture • Mixture • Density • Density • Random Sampling • Random Sampling

MIXTURE MIXTURE

NEW SPEC NEW SPEC Lot size: 6000 tons Lot size: 6000 tons QA Sample Location: Behind the Paver QA Sample Location: Behind the Paver QC Frequency: As approved in QC plan. QC Frequency: As approved in QC plan. Sampling may be from trucks or BTP. Sampling may be from trucks or BTP. QA Frequency - minimum of 1/day/mix or QA Frequency - minimum of 1/day/mix or 1/1000 tons; whichever yields higher 1/1000 tons; whichever yields higher frequency. frequency. QA test compared to QC by MSMT 733, t & QA test compared to QC by MSMT 733, t & F tests. If comparable, QC & QA results will F tests. If comparable, QC & QA results will be combined to determine final pay factor. If be combined to determine final pay factor. If not, only State results will be used. not, only State results will be used. No incentive No incentive

DENSITY DENSITY

NEW SPEC QC - core or nuclear testing QC - one test per 500 tons or 5 per day QA - one core required per 500 tons or 5 per day QA core results used to develop pay factors. QC core results may be used as well. t & F tests used for Acceptance / Pay Testing frequency based on paving production. Use Behind Paver Gravities Pay adjustments by lot based on average density and minimum value Incentive allowed

No Sublot Below

No Sublot Below

Project Project Inventory Inventory Pavement Pavement Pavement Pavement Information Information Design Performance Design Performance Information Data Information Data Ride Quality Ride Quality MD Materials MD Materials Data Data Database Database Asphalt Binder Asphalt Binder Construction QA Data Construction QA Data Details Details HMA Mix HMA Mix Design and Design and Gloria Burke QC/QA Data QC/QA Data

HMAview HMAview Homepage - - Homepage - Homepage choose the project choose the project choose the project you wish to view. you wish to view. you wish to view.

From pavement design files From pavement design files From pavement design files

Image from Image from Image from thermal thermal thermal camera camera camera

Shows all Shows all Shows all locations locations locations sampled sampled sampled

Close- -up view up view Close Close-up view of sample of sample of sample location (Click location (Click location (Click on pushpin for on pushpin for on pushpin for details details details

DATA ANALYSIS: Future DATA ANALYSIS: Future DATA ANALYSIS: Future addition to OMT OMT’ ’s s database database addition to addition to OMT’s database

DATA ANALYSIS: Future DATA ANALYSIS: Future DATA ANALYSIS: Future addition to OMT OMT’ ’s s database database addition to addition to OMT’s database

What’s Next? HMA Pooled Fund Consortium A private-public partnership to further develop and use computer-based pavement tools: HMA View Database Interactive Pavement Training Computer Simulations Distance Learning

Questions ? Thank You!