CRSI and Reinforcing Steel Update

CRSI and Reinforcing Steel Update Bob Risser, P.E. President & CEO TTCC / National Concrete Consortium Fall 2012 Seattle, Washington 1 Agenda  CRSI...
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CRSI and Reinforcing Steel Update Bob Risser, P.E. President & CEO TTCC / National Concrete Consortium Fall 2012 Seattle, Washington 1

Agenda  CRSI – The Organization  Bar Markings  CRSI “Mythbusters”

CRSI – The Organization  The Concrete Reinforcing Steel Institute (CRSI) was founded in 1924, making it one of America’s oldest construction industry trade associations.

CRSI – The Organization    

CRSI membership: Reinforcing steel producers Fabricators Placing contractors Accessories manufacturers (splice, couplers, bar supports).

CRSI – The Organization    

Associate members include: Epoxy coaters Equipment manufacturers Concrete contractors Other companies engaged in reinforced concrete construction.

CRSI – The Organization     

Professional members include: Engineers Architects Construction managers Students

CRSI Membership Represents the Industry

 90+% of all U.S. domestic rebar, smooth dowel, and wire production.  80+% of fabricated rebar tonnage.  Most dowel baskets manufactured by CRSI members.

Transportation Efforts  Bridges » Danielle Kleinhans, PhD, P.E., Structural/Transportation Engineer » Official Concrete Rep to LTBP » Chair of NCBC

 Pavements » Partnership with ACPA » Cooperative Agreement with FHWA on CRCP

Certification  Epoxy Coating Plant » 20th Year » Proceeding toward ANSI Accreditation

 Adhesive Anchor Installer » Joint ACI-CRSI program » Launched in 2011 The Strength in Reinforced Concrete

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CRSI as SDO  Member of ANSI  Standards Committee formed  Next steps » Policy Document ~ » ANSI Application Submitted Approval » Ballot Proposed Standards The Strength in Reinforced Concrete

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Proposed Standards  Bar Supports  Conversion of curret Manual of Standard Practice  Proceeding for ACI 301 Reference (Specifications of Structural Concrete) The Strength in Reinforced Concrete

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MSP Moving Forward  Standards for the Usage of Reinforcing Steel in Concrete Construction » ANSI Standard

 Guide to Common Reinforcing Steel Industry Practice » Guide and commentary The Strength in Reinforced Concrete

Working Titles 12

Bar Markings ~ back to in-lbs

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CRSI Board of Directors :  CRSI producer members revert back to the in.-lb marking system » November 9, 2011 meeting

 Phase-in target date is January 1, 2014

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Why Change Markings?  FHWA no longer mandates metric system on Federal-Aid projects » Memorandum - November 25, 2008

 Key ACI documents never converted to soft metric designations CONFUSION IN INDUSTRY The Strength in Reinforced Concrete

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Bar Markings  Contained in CRSI MSP 2009  Present reference to metric marks

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ID Examples

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Inspection in Interim Period  Confusion with mill / bar markings?  Should not be a basis for rejection

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Planned Monthly Web Updates

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Myth #1  All steel reinforcing bar is made with virgin iron ore from the Mesabi Iron Range whose cost is stable over long periods. The Strength in Reinforced Concrete

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Myth Buster #1  Steel reinforcing bar is made of 95 to 98 % scrap steel  Scrap is now a worldwide commodity

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Electric Arc Furnace (EAF)

Forming Billets

Cooling Steel Billets

Deformation Machine

Cooling Rack

The New Reality: Volatility >55% of Rebar Cost is Scrap

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Scrap Prices – 1970 – 2011 AMM #1 HMS Composite - $/GT $600 $550 $500 $450 $400 $350 $300 $250 $200 $125 $125 $150 $100 $50 $35 $0 1970 1975 1980

Jul-08 $519 Aug-11 $419

Mar-04 $250 $115

$145 $65

1985

1990

1995

2000

Nov-08 $101 2005

2010

Source: American Metal Market Figure 1

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Scrap Prices – 2003-2011 AMM #1 HMS Composite - $/GT $600 $550 $500 $450 $400 $350 $300 $250 $200 $150 $100 $50 $0

Jul-08 $519 Aug-11 $419

Mar-04 $250

Nov-08 $101 2003

2004

2005

2006

2007

2008

2009

2010

2011

Source: American Metal Market Figure 2

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Myth #2  An ASTM designated product means it is readily available in the marketplace.

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Myth Buster #2  Yes, for: » A615, Grade 60 » A706, Grade 60 » Epoxy - coated

 Others may be a mill order with a minimum weight (in tons) The Strength in Reinforced Concrete

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Myth #3  Stainless steel reinforcing bar refers to one product. OR  Any stainless steel alloy is available as reinforcing bar.

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Myth Buster #3  There are hundreds of grades & sub grades of Stainless Steel  Stainless Steel » Large family of alloys » Different properties for the application

 Reinforcing bar available in 5 to 6 of the alloys The Strength in Reinforced Concrete

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Myth #4  Changing the reinforcing bar type in a bridge deck will guarantee a 75-year design life for the DOT.

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Myth Buster #4 Reinforcing steel Placing conditions Curing Concrete mix

Aggregate durability

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Myth Buster #4 (cont.)  Bridge decks are made of many interrelated components  It is a system  All chain links must have comparable service lives » Reinforcing steel is but 1 component

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Myth #5  CRSI doesn’t participate in research

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Myth Buster #5  CRSI R&D Committee  CRSI Research and Education Foundation

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Completed Projects Project

University

Use of Ultrahigh-Strength Purdue University Reinforcement in Columns of Frames to Resist Seismic Loads Evaluation of the Orientation of Missouri University of 90° and 180° Reinforcing Bar Science & Technology Hooks in Wide Members

• Research Notes being prepared The Strength in Reinforced Concrete

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Lap Splices in Thin Members School Purdue University Principal Investigator Dr. Santiago Pujol Matching Funds Purdue Foundation Erico Status - Ongoing

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Spiral Stirrups School University of Cincinnati Principal Investigator Dr. Bahram Shahrooz Funding Pankow Foundation CRSI and PCI Status - Pending

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dogleg

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Bar Bending School NC State University Principal Investigator Dr. Rudolf Seracino Funding CRSI & NC State Foundation Status - Starting

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High-Strength Bar Hooks School University of Kansas Principal Investigator Drs. David Darwin & JoAnne Browning Funding EPRI, CRSI, KDOT, Pankow Status - Ongoing The Strength in Reinforced Concrete

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High-Strength Rebar  Classed as yield (fy ) ≥ 80 ksi  Collaborative research consortium?

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High-Strength Rebar  Economic analysis  Develop generic material requirements (ASTM spec)  Structural research  Code adoption

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High-Strength Rebar  What questions does the industry need / want to be answered?  Is it a viable product?  Will its availability expand / open markets for concrete construction?

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Myth #6  CRSI has no local presence, just an office in Chicago

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CRSI Regions

THANK YOU!

www.crsi.org

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