Lindgård, Jan

Wigum, Børge Johannes

English

Development and assessments of test methods, to avoid deleterious AAR in concrete, have been the focus of three previous RILEM Technical Committees (TC) in the period 1989 to 2014. The 4th RILEM TC on AAR, TC 258-AAA, was established in 2014, and will until 2019 focus on the following Work Packages: WP1- Performance based testing concepts; WP2 - Relationship between results from laboratory and field and the establishment of field exposure sites; WP3 - Testing of potential alkalis released from certain types of aggregates and measurement of internal concrete alkali content; WP4 - Verification of alkalis released from aggregates

NORA - Norwegian Open Research Archives

The RILEM approach to mitigate alkali aggregate reactions (AAR) in concrete

SINTEF Open

31.01.2018Stockholm 2018‐01‐31 Jan Lindgård (Hållbart samhällsbyggande med beständig betong) 1The RILEM Approach to Mitigate Alkali Aggregate Reactions (AAR) in ConcreteRILEM Technical Committee (TC) 258‐AAA (2014–2019)Avoiding Alkali Aggregate Reactions in Concrete. Performance Based Concept. Børge Johannes Wigum (Chairman)Jan Lindgård (Secretary)Northern EuropeRILEM Technical Committees (TCs) on AARo TC 106 (1988–2001) ‐ Accelerated Aggregate Testso TC 191‐ARP (2001–2006) ‐ Diagnosis/Appraisal & Specificationo TC 219‐ACS (2006–2014) ‐ Performance Testing & ModellingDr Philip Nixon – Chairman                    Dr Ian Sims – Secretary25 years; 1988 – 2014International Union of Laboratories and Experts in Construction Materials, System and Structures31.01.2018Stockholm 2018‐01‐31 Jan Lindgård (Hållbart samhällsbyggande med beständig betong) 2201620162013TC 258‐AAA (2014 – 2019)(Avoiding Alkali Aggregate Reactions in Concrete – Performance Based Concept)The purpose of this Technical Committee (TC) is to developand promote a performance based testing concept for the prevention of deleterious Alkali Aggregate Reactions (AAR) in concrete. Strong emphasis will be put on the implementation of the RILEM methods and recommendations as national‐ and international standards.Professor Børge Johannes WigumChairman – RILEM TC 258‐AAAHeidelbergCement Northern EuropeDr Jan LindgårdSecretary – RILEM TC 258‐AAASINTEF Building and Infrastructure31.01.2018Stockholm 2018‐01‐31 Jan Lindgård (Hållbart samhällsbyggande med beständig betong) 3RILEM TC 258 AAA (2014–2019)o WP1 ‐ Performance testing and accelerated testing in laboratory– Dr Terje F. Rønning, (HeidelbergCement Northern Europe, Norway)o WP2 ‐ Performance testing and laboratory vs. field; Exposure site– Professor Benoît Fournier (Université Laval, Québec, Canada)o WP3 ‐ Performance testing; Assessment of detailed alkali inventory in concrete, including internal aggregate release, recycling and external supply.– Dr EsperanzaMenéndez Méndez (Institute of Construction Science, “Eduardo Torroja” (CSIC), Spain)o WP4 – Verification of alkalis released from aggregates – Dr Klaartje De Weerdt (Norwegian University of Science and Technology, NTNU, Norway)o Develop performance test method(s):• "RILEM AAR‐10" (38°C concrete performance test)  – 2017: Draft test procedure agreed Reduce leaching of alkalis  Increased prism size (100 mm)– Two applications1. Testing of specific aggregate combinations together with various binder combinations2. Determination of general binder composition together with a "worst case" aggregate– Assessment of test results:WP1 ‐ Performance testing and accelerated testing in laboratoryDr Terje F. Rønning (HeidelbergCement Northern Europe, Norway)Minimum SCMconstituent [W‐%]Expansion [%]AcceptanceLimit ClinkerAlkali[kg/m3]Expansion [%]AcceptanceLimit2. Maximum alkali content (from clinker and any alkalis added)1. Minimum content of an SCM constituent31.01.2018Stockholm 2018‐01‐31 Jan Lindgård (Hållbart samhällsbyggande med beständig betong) 4o Develop performance test method(s):• "RILEM AAR‐10"– 2018: Arrange Round Robin Test (RRT) (part of the Norwegian KPN‐ASR project)• On‐going work on two (possible) alternative test procedures– (“RILEM AAR‐11”: 60°C concrete performance test) – (Japanese test procedure "TC‐Draft of JCI‐TC115FS‐2013"; alkali wrapping) o Validate alkali‐boosting– Ensure sufficient range of potential variations from the concrete constituents– How much? (potential side effects?)– Limited test program (part of the Norwegian KPN‐ASR project)WP1 ‐ Performance testing and accelerated testing in laboratoryo LNEC cube study (2015) – Document environmental effectso PARTNER blocks (2004) – Post‐documentation of field cubes (2017)o STAR‐report on the lab./field correlation (on‐going)WP2 ‐ Performance testing and laboratory vs. field; Exposure siteProfessor Benoît Fournier (Université Laval, Québec, Canada)WatfordTrondheimDüsseldorfMilanValenciaBrevikBoråsLisbon & Cascais (sea side)ReykjavikLNEC cube studyPartner ProjectParisTreat IslandAustinOttawa31.01.2018Stockholm 2018‐01‐31 Jan Lindgård (Hållbart samhällsbyggande med beständig betong) 5Canadian experience: Higher expansion in field vs. laboratoryo Develop a procedure for measuring alkali release from aggregates • "RILEM AAR‐8"– 2015: Draft test procedure agreed– 2016: RRT initiated (5 aggregates, 6 labs)o STAR‐report on “alkali inventory” (on‐going)WP3 ‐ Performance testing; Assessment of detailed alkali inventory in concrete, including internal aggregate release, recycling and external supplyDr Esperanza Menéndez Méndez (CSIC, Spain)31.01.2018Stockholm 2018‐01‐31 Jan Lindgård (Hållbart samhällsbyggande med beständig betong) 6o Validate the test method for alkalis released by aggregates (AAR‐8)o Verification of potential alkali‐release during lab. performance testing or in field structuresDraft topics:1. How much of the total alkali from the cement is available in the pore solution?2. Comparing methods to determine free alkali content? What is their accuracy?3. Gathering results from on-going verification tests4. Propose reference non-releasing aggregate for future studiesWP4 ‐ Verification of alkalis released from aggregates [New activity 2017]Dr Klaartje De Weerdt (NTNU, Norway)Meetings of RILEM TC 258‐AAA4th Meeting in Paris 7th ‐ 8th March 2016 1st Meeting in Oslo 2nd – 3rd October 20142nd Meeting in London 27th ‐ 28th April 2015 3rd Meetings in Toronto 23rd ‐ 25th September 201531.01.2018Stockholm 2018‐01‐31 Jan Lindgård (Hållbart samhällsbyggande med beständig betong) 76th Meeting, Lyngby/Copenhagen 25th and 26th August 20167th Meeting Stockholm 11th and 12th May 2017Meetings of RILEM TC 258‐AAA5th Meeting, São Paulo, Brazil, 7th July 20168th Meeting Vienna 15th and 16th November 2017

The RILEM Approach to Mitigate Alkali Aggregate Reactions (AAR) in Concrete

https://sintef.brage.unit.no/sintef-xmlui/bitstream/11250/2499989/2/RILEM%2bTC%2b258-AAA%2b-%2boversikt%2bover%2baktiviteter%2b-%2bStockholm%2b2018-01-31.pdf

The RILEM Approach to Mitigate Alkali Aggregate Reactions (AAR) in Concrete

Abstract

Similar works

Full text

Available Versions

NORA - Norwegian Open Research Archives

SINTEF Open