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P2P Update. January 17, 2007. P2P Update. Promote performance based specifications as the preferred alternative to prescriptive specifications through Partnering Industry Credibility Codes and Standards Technology Case Studies Education. Goal 1: Partnering – Progress .

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P2P Update

January 17, 2007


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P2P Update

  • Promote performance based specifications as the preferred alternative to prescriptive specifications through

    • Partnering

    • Industry Credibility

    • Codes and Standards

    • Technology

    • Case Studies

    • Education


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Goal 1: Partnering – Progress

  • Advisory group of engineers and architects

  • Advisory group of contractors (ASCC)

  • 100+ presentations/seminars on P2P Initiative

    • ACI local chapters

    • State RMC Associations

    • State SEA and ASCE chapters

    • National Conventions (ACI, ASCE, NCSEA, AIA, CSI, AASHTO)

  • Guidance on concrete specifications

  • Communicate progress via newsletters, web site, and industry publications


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Goal 2: Credibility – Progress

  • Quality management system

    • Guidelines have been developed

    • Based on ISO 9000 concept

  • Producer certification program

    • Pre-qualify producers for performance-based projects

    • Based on quality management system

    • Under development

  • Concrete professional certification through ACI

    • Develop and approve performance mix designs

    • Guidelines and training program

    • Under development


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Goal 3: Codes and Standards – Progress

  • Model (guide) performance specification

    • Example performance-based specification developed

    • Developing model specification – ongoing Bickley, Hooton, Hover research project – May 2007

    • ACI Strategic Development Council ATI #44

      • Proposed ACI-ITG to develop guide specification

  • Code change proposals

    • ACI 318 Chapter 4 alternative to w/c ratio (RCPT) rejected for 2008 – will try again in 2011

    • ACI 318 Chapter 4 exposure class concept approved for 2008

    • ASTM C 94 performance/prescriptive option still under discussion


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Example Performance Specification

  • Uses a building example

  • Concrete with

    • No exposure

    • Freeze-thaw exposure

    • Sulfate exposure

  • Objective

    • Minimize prescriptive requirements

    • Meet current ACI 318 code requirements


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Preparation of a Performance-based Specification for Cast-in-Place Concrete

  • Conducted by Bickley, Hooton, and Hover

  • Phase I was completed in January 2006

  • Comprehensive review of performance specs and tests from around the world

  • Phase II will include a standard spec in ACI 301 format

  • Scheduled for completion in May 2007


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Goal 4: Technology – Progress Cast-in-Place Concrete

  • Research project to develop durability test for qualification and acceptance

    • Alternative to w/c requirement in ACI 318

    • Correlate index tests (RCPT, RMT, and Sorptivity) to science based tests such as diffusion measurements

    • Funded by NRMCA, RMC Research Foundation, PCA

    • Co-funded by FHWA pool-fund study to correlate laboratory measurements with field results

    • Estimated at $1.5 Million over 4 years


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Goal 5: Case Studies – Progress Cast-in-Place Concrete

  • Compared results of several tests on lab samples

  • Prescription vs performance specs for:

    • Slab on Grade

    • Bridge Deck

    • Structural Concrete (ACI 318)

  • In all cases performance criteria gave better results


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Goal 6: Education – Progress Cast-in-Place Concrete


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Introduction to P2P Cast-in-Place Concrete

  • Presentation

  • Brochure

  • Basic overview of the P2P Initiative

  • Encourages people to take the online seminar


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ASCE Seminar Cast-in-Place Concrete

  • Two-day seminar

  • Structures subject to extreme conditions

    • Freeze-thaw

    • Chemical attack

    • Corrosion

  • Provide design details

  • Develop performance-based specifications

  • Latest quality assurance methods


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P2P Articles Cast-in-Place Concrete

  • Approximately 20 articles published

  • Structure magazine

  • Concrete International

  • Structural Engineer

  • Other articles and downloads are available at www.nrmca.org/P2P


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2007 Concrete Technology Forum Cast-in-Place Concrete

  • High Performance Concrete

  • May 22-24, 2007

  • Fairmont Dallas Hotel

  • Topics include:

    • Self Consolidating Concrete

    • Ultra Fast Track Construction

    • Extended Service Life

    • Industrial Concrete Floors

    • Applications and Case Studies

    • Performance Specifications and Testing


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Questions? Cast-in-Place Concrete