Minutes Meeting 5th of April 2005 at JEC in Paris
Minutes Meeting 17th of November 2004 at Concrete Day in Rotterdam
INTERNAL REINFORCEMENTS IN CONCRETE CONSTRUCTIONS
Product specifications and application standards
Location: Parc des Expositions, Paris, France
5 April 2005
DOWNLOAD AS WORD FILE HERE
Present:
Dr. Gleb Makarov GM Armoproject, UK
Mr. Alexei Asseev AA Company Armoproject, RUS
Mr. Arne Roger Hole AH Composite Reinforcement Systems AS, N
Mr. John Hartley JH Fibreforce Composites Ltd, UK
Mr. Claude M. Renaud CR Owens Corning, B
Dr.-Ing. André Weber AW Schöck Bauteile GmbH, D
Ms. José Bakker JB COBRAE, NL
Mr. Jaap Ketel JK COBRAE, NL
Apologies:
Mr. Per Orre Fiberbar AB, S
Mr. Bert Kriekemans Fortius, Divisie van B.K. International bvba, B
Mr. Doug Gremel Hughes Brothers, US
OPENING
Arne Roger Hole, AH, opened the meeting at 11.15 hrs.
Meeting is arranged to reactivate efforts on standards and guidelines for internal reinforcements in Concrete Constructions in Europe.
1. fib DRAFT CODE AVAILABLE
Chris Bourgon of the Sheffield University has written a draft code, which is available on the fib site for perusal. This document is more updated than the ACI codes and includes the last ten years of product development and application.
Arne Roger will contact Luc Taerwe if the Cobrae members could have access to the web-side of fib to give their comments to the document. The working group are asked to download the code and give there comments within April/May.
fib aims to present the finished code as a fib Bulletin in June 2006 in Naples.
This working group could give a commercial background for the scientific work already done.
Aim is to have simple and secure guidelines!
=> AH will ask Luc Taerwe, chairman of the fib group TG 9.3, if the access code and link for the draft code can be available to all working group members.
2. TESTING PROGRAMME/ PRODUCT SPECIFICATION
Do we want an independent Research Institute to do all tests on our products? No preference for a written procedure on what tests to do and how to perform them so that the producers can chose their own test centre. This way information on testing can be spread more easily.
Biggest problem for the industry is that producer can start selling their products without being sufficient tested. The Cobrae group should see to that this does not happend.
What should be defined of the product?
- Raw materials
- Process, described in the terms of health, safety, environmental standards
- Product defined on performance:
SHORT TERM
- Tensile
- interlaminar shear
- shear cut off
- bending
- pull out bond
DURABILITY
Chemical
(load 2000 hrs 60°C a design head
13.7 NAOH
in distilled water
= worst case scenario)
LONG TERM
- dynamic
- fatigue (2M cycles)
- cyclic bonding
- ultimate elastic wall stress of KEMA
All the above test are described for steel. Be careful not to be to demanding, tests cost money.
LONG TERM TESTS
The KEMA testing method 'Ultimate Elastic Wall Stress' is a low-cost test with which not million cycles are needed.
=> JK to send information to all WG-members
=> JK find out whether KEMA sees an option to translate this test to Composite Rebar.
AlfaBetaGamma is a longterm test under load for pipe manufacturers. This test needs to be translated to rebar. For this test the parameters need to be calculated this needs a lot of data.
=> All WG members provide information on the tests they perform before the 15th of May. Please list reason for test; whether you recommend this test; problems and advantages of this test.
=> Tests will be commented by all and the best tests will be included.
Durability is an import test, this will justify the extra costs involved in using Composite Rebar instead of steel rebars.
JH proposed a 4-3 point stress under constant strain.
JH points out that the test needs to be done with a flexular strain, this way the glass will damage.
Should Composite Rebars be benchmarked against the steel method tests? Is there a test which would show the direct advantages of composite rebar?
AH sees an opportunity for composite rebar in the lowering of CO2 exhaust. This means that the concrete will be made of a lower quality (slow cement or low alkaline cement), which does not protect the steel rebar. This protection is not necessary for FRP.
Will the cut surfaces need to be sealed for testing? All tests should be done on the product as it will be sold. Coated or uncoated.
Should water absorption be part of the testing?
There is no correlation between the weight uptake and loss of properties.
Cobrae group should focus on to minimize the number of tests to just what will be needed for the designers and to secure quality of the products.
Nomenclature: COMPOSITE REBAR
Product description: Brand name - fibre - ?resin? - diameter - modulus - strength
FIBRE
G = glass
B = basalt
C = carbon
A = aramid
RESIN
P = Thermoplast
S = Thermoset
H = Hybrid
DIAMETER
Effective cross section in mm2
MODULUS
E in GigaPascal
STRENGTH
gs in MegaPascal
The resin does not need to be included.
=> Non-members need to be informed on what is going on, short informative text of the activities of the Working Group to be made available by AH
Need to be a member to get the test information etc.
3. PROMOTION OF INDUSTRY
As the fib group will take care of codes and design making, COBRAE will take care of the promotion of these products and areas of application.
Website is the best tool.
=> Case stories and pictures to be supplied by members to the COBRAE office
Information to be given:
Name project, amount, size and other data, engineering firm, designer, manufacturer etc.
=> AH will supply the link to the bridge observation in Canada.
Only members can have their projects listed.
=> JB call for projects for the website
4. ACTION LIST
Last meetings actions:
1.1 JH will find out the status of the inhouse guideline of the Bath University
1.2 CR will follow up on the research at the University of Mumbai.
1.3 Members-Only section of website to be placed including an exchange forum for documents.
New actions this meeting:
2.1 AH will ask fib if the access code for the draft code can be available to all working group members.
2.2 JK to send information to all WG-members
2.3 JK find out whether KEMA sees an option to translate this test to Composite Rebar.
2.4 All WG members provide information on the tests they perform before the 15th of May. Please list reason for test, whether you recommend the test and problems and advantages of test.
2.5 Tests will be commented by all and the best tests will be included.
2.6 Non-members need to be informed on what is going on, presentation text by AH
2.7 Case stories and pictures to be supplied by members to the COBRAE office
2.8 AH will supply the link to the bridge observation in Canada.
2.9 JB call for projects for the website
2.10 JH will find out the status of the inhouse guideline of the Bath University
2.11 CR will follow up on the research at the University of Mumbai.
2.12 Members-Only section of website to be placed and exchange forum for documents.
5. NEXT MEETING
Meeting of fib is on the 13th and 14th of April in Lyon.
After e-mail round, see if a meeting is needed.
Concrete day is on the 17th of November in Rotterdam. Meeting is set for the 18th of November in the morning.
Closure, Meeting is closed by Chair, thanking members for their presence.
INTERNAL REINFORCEMENTS IN CONCRETE CONSTRUCTIONS
Product specifications and application standards
Location: De Doelen, Rotterdam
17 november, 2004
DOWNLOAD AS WORD FILE HERE
Present:
Dr. Gleb Makarov Armoproject, C/o University of Southampton, UK
Ms. José Bakker COBRAE, NL
Mr. Alexei Asseev Company Armoproject, RUS
Mr. Nikolay Shevchenko Company Armoproject, RUS
Mr. Arne Roger Hole Composite Reinforcement Systems AS, N
Mr. Pål Stampe Composite Reinforcement Systems AS, N
Mr. Per Orre Fiberbar AB, S
Mr. John Hartley Fibreforce Composites Ltd, UK
Mr. Bert Kriekemans Fortius, Divisie van B.K. International bvba, B
Mr. Doug Gremel Hughes Brothers, US
Mr. Claude M. Renaud Owens Corning, B
Dr.-Ing. André Weber Schöck Bauteile GmbH, D
OPENING
Arne Roger Hole opened the meeting at 09.00 hrs.
Meeting is arranged to reactivate efforts on standards and guidelines for internal reinforcements in Concrete Constructions in Europe.
1. SELF INTRODUCTIONS
All present introduce themselves shortly.
2. BRIEF REVIEW OF EXISTING APPLICATION AND DESIGN GUIDELINES
- ACI 440.1R-03 & proposed revisions
American code from the American Concrete Institute: Guide for the design and construction of concrete reinforced with FRP Bars. This is the 3rd version and a draft for improvements will be incorporated in the new version ACI 440.1R-05 which will be published in 2005. This is a very technical guideline. (ACI codes are BLUE documents and guidelines GREEN.)
Doug Gremel will send draft by email to all present.
- CSA S806
Canadian guideline for building, includes a design code for bridges, which can be downloaded. http://www.csa-intl.org
- JSCE
Japanese were first with guidelines & codes "Design guidelines of FRP Reinforced Concrete Building Structures" from the Japanese Ministry of Constructions Research and Development. The English version is a summary. The translations were stopped due to financial restrictions.
- BS5400
Institution of Structural Engineers has written an "interim guidance on the design of reinforced concrete structures using fibre composite reinforcement".
This document is now being modified.
- Norwegian Standards
The guidelines which are now in use in Norway are based on several Candian, American, Norwegian and Japanese documents. It is very conservative.
Next year the Norwegian Standardisation Organisation will start up the work for an appendix to the design code. This will focus on testing and design formulas.
‘Eurocrete, modifications to NS3473 when using fiber reinforced plastic reinforcement STF22A98741’.
European Standardisation of Concrete Design, 4,5 years ago they were sceptical towards FRP, now there is an interest in including FRP in their codes.
3. STATUS OF GUIDELINES IN THE COUNTRIES REPRESENTED
Belgium: (Bert Kriekemans) no design or guidelines. fib Task Group 9.3 has done a lot of the work, there should be a push to finish this work.
United Kingdom: (John Hartley) Work on Eurocrete ended in 1998. There is a lot of information available, this information is very scattered. Collating this information would supply a lot of information. Kit Ross (?) from Bath University has done a lot of work on internal reinforcing.
Fibreforce itself has inhouse appr. of Eurocrete.
John Hartley will find out the status of work at Bath University and possibility of using inhouse guidelines.
Russian Federation: (Gleb Makarov/ Alexei Asseev) There are design codes for concrete and steel. No current standard on testing of mechanical properties. Now companies propably use the American information. If a European guideline would be available, this would be used.
Alexei Asseev will find out more about which institutes work on guidelines and designcodes in Russia.
Work is being done on technical specifications for basalt fibers.
Germany: (André Weber) none are available in Germany and the same goes for the Netherlands. Have done research into durability and bonding. These are the key factors for safety.
Eurocodes (1045.1) are ok in use for FRP. Schöck is working with Universities in Europe for testing.
If a guideline or testing method is approved in Germany than it will be easy to introduce these to other European countries.
Claude Renaud informs that in India the University of Mumbai is gathering data on durability of glass.
Claude Renaud will find out current status.
Sweden: (Per Orre) Group was started but this was to early. For guidelines work should be done with the Railroad Authorities. They have had biggest success with bridges.
Norway: (Arne Roger Hole) Has noticed the same, that it is easier to get things done through the Railroad Authoriteies.
4. BRIEF REVIEW OF REBAR TEST METHODS:
- ACI440.3R-04
Just published! Guide to test methods. Document is downloadable http://www.aci-int.org/PUBS/newpubs/440.3R-04.htm
- JSCE
This is a very important document and it is part of the guideline Non- conventional Reinforcement of concrete - Test methods - Part 1: FRP bars and grids.
- ISO TC71
More important for the EU is the ISO TC 71/ committee CS 6N which was written by Professor Massimo (?) from Japan. This is approved in Turkey.
Everyone should have a look at this document and decide whether we can live with this or give comments for improvement. Ideal situation as everything complies to ISO standards.
Doug Gremel will send an Electronic copy as draft.
5. PRODUCT SPECIFICATIONS:
We should be carefull about getting a bad name for the industry. There has to be a way to weed out the rif-raf. Prescriptive specifications should be available to users. (Not performance specifications)
The FRP Rebar Manufacturers Council (FRP-RMC) have written Recommended Specifications for FRP reinforcements.
Doug Gremel will send a copy of this document
This document is a living document which is constanctly updated. Have to be a member of ACMA to be part of the FRP-RMC. Possible COBRAE can be connected to ACMA and make it possibly for COBRAE/ACMA members to take part in both groups.
Concensus for this proposal as the US is more advanced in the application of internal reinforcement and the Europeans should use the knowledge already available.
6. fib TASK GROUP 9.3
The efforts already made by the fib task group 9.3 where of high quality. The work has stalled and perhaps industry participants will have to jump start the efforts.
7. OTHER BUSINESS
Sireg and ATP should be approached to become members of this working group.
Working Group members-only to be made available on the COBRAE website for exchange of guidelines etc.
8. NEXT MEETING
Next working group meeting is scheduled to coincide with the COBRAE Conference at EMPA University on 31 March until 1 April. Proposal for now: afternoon 30 March.
Closure, Meeting is closed by Chair, thanking members for their presence.
Action list:
1. Doug Gremel will make available mentioned documents to all present in meeting (done)
2. John Hartley will find out the status of work at Bath University and possibility of using inhouse guidelines.
3. Alexei Asseev will find out more about institutes in Russia
4. Claude Renaud will find out current status research at the University of Mumbai
5. COBRAE to make available Working Group members-only on the COBRAE website
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