crsi and reinforcing steel update · the concrete reinforcing steel institute (crsi) was founded in...
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CRSI and Reinforcing Steel Update
Bob Risser, P.E. President & CEO
1
TTCC / National Concrete Consortium Fall 2012 Seattle, Washington
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Agenda
CRSI – The Organization Bar Markings CRSI “Mythbusters”
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CRSI – The Organization
The Concrete Reinforcing Steel Institute (CRSI) was founded in 1924, making it one of America’s oldest construction industry trade associations.
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CRSI – The Organization
CRSI membership: Reinforcing steel producers Fabricators Placing contractors Accessories manufacturers
(splice, couplers, bar supports).
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CRSI – The Organization
Associate members include: Epoxy coaters Equipment manufacturers Concrete contractors Other companies engaged in
reinforced concrete construction.
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CRSI – The Organization
Professional members include: Engineers Architects Construction managers Students
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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.
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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
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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 9
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CRSI as SDO
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Member of ANSI Standards Committee formed Next steps
» Policy Document ~ » ANSI Application Submitted -
Approval » Ballot Proposed Standards
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Proposed Standards
Bar Supports Conversion of curret Manual of
Standard Practice
Proceeding for ACI 301 Reference (Specifications of Structural 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
12 The Strength in Reinforced Concrete
Working Titles
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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
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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.
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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)
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Forming Billets
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Cooling Steel Billets
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Deformation Machine
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Cooling Rack
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The New Reality: Volatility
>55% of Rebar Cost is Scrap
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Figure 1 29
Scrap Prices – 1970 – 2011
$0$50
$100$150$200$250$300$350$400$450$500$550$600
1970 1975 1980 1985 1990 1995 2000 2005 2010
Source: American Metal Market
AMM #1 HMS Composite - $/GT
$35
$125 $125 $115 $145
$65
Jul-08 $519
Aug-11 $419
Nov-08 $101
Mar-04 $250
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Scrap Prices – 2003-2011
$0$50
$100$150$200$250$300$350$400$450$500$550$600
2003 2004 2005 2006 2007 2008 2009 2010 2011
Source: American Metal Market
AMM #1 HMS Composite - $/GT Jul-08 $519
Aug-11 $419
Nov-08 $101
Mar-04 $250
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)
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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
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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
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Reinforcing steel
Placing conditions
Concrete mix
Curing
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
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CRSI doesn’t participate in research
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Myth Buster #5
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CRSI R&D Committee
CRSI Research and Education Foundation
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Completed Projects
Project University Use of Ultrahigh-Strength Reinforcement in Columns of Frames to Resist Seismic Loads
Purdue University
Evaluation of the Orientation of 90° and 180° Reinforcing Bar Hooks in Wide Members
Missouri University of Science & Technology
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• Research Notes being prepared
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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 44 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
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CRSI has no local presence, just an office in Chicago
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CRSI Regions
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THANK YOU!
www.crsi.org