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1. Opening of the meeting
Prof. Wang Ling, the secretary of RILEM TC-TDC, introduced the agenda at the beginning of this informal meeting.
Next, Dr. Wang Zhendi outlined the progress of the compilation of annotated bibliography, the main task of Group A during the first year.
2.Conclusions of Group A
2.1 Collection of publications
Group A will stop collecting papers by Mar. 31, 2013. Then the draft version of the “Annotated Bibliography” will be sent to all TC members for comments. The final version will take the comments into consideration.
2.2 The annotation of the bibliography
Introductory remarks for the 10 subchapters will be prepared by experts (See Table 1). Selected TC members will be asked to write the introductory remarks.
(1) As an example introductory remarks of section 1 and section 2 will be provided by Prof. Wittmann before Dec. 20, 2012. At least one example will be sent to the selected experts with an invitation to write their introductory remarks in the similar way.
(2) All the introductory remarks should be written and sent to the secretary of the TC before the end of March 2013.
2.3 Next steps
(1) CBMA will print 20 copies (working documents) of the annotated bibliography (References and abstract) to be distributed at the Qingdao Meeting in May 2013.
(2) CBMA will make 50 printed copies and CDs of the final annotated bibliography after approval by the TC members by May 2013.
Table 1 Selected candidates for writing introductory remarks
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Chapter
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Person in charge
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1.1 Chloride penetration and mechanical load
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Prof. Wittmann F.H.
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1.2 Carbonation and mechanical load
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Prof. Wittmann F.H.
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1.3 Chloride penetration and Freeze-thaw attack
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Dr. Zhang P.
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1.4 Carbonation and freeze-thaw attack
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Dr. Jiang FX.
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1.5 Thermal action and mechanical load
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Prof. Khelidj A.
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1.6 Sulfate attack and mechanical load
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Prof. Xing F.
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1.7 Cracks and accelerated migration
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Dr. Zhang P.
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1.8 Corrosion under combined actions
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Prof. Weiss W. J.
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1.9 Leaching and mechanical load
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Prof. Wittmann F.H.
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1.10 Other load combinations
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Prof. Glinicki M.
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PART II : THESES
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Prof. Schlangen E
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PART III: BOOKS AND REPORTS
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Prof. Schlangen E.
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Deadline: End of March, 2013
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3. Conclusions of Group B
3.1 Comparative test methods
Three Combinations of mechanical load and environmental actions shall be investigated:
(a) Compression + chloride penetration and carbonation,
(b) Tension + chloride penetration and carbonation and
(c) Bending + chloride penetration and carbonation.
3.1.1 Mechanical load and chloride penetration
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Preparation of the specimens
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Dimension
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100*100*400mm
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Curing
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Under water for 28 days
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Chloride
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Exposure to 5% NaCl solution, chloride diffusion for 7 and 28 days, determination of chloride profiles by grinding and chemical analysis
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Loading conditions
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Compression: 0, 30%, 50% and 80% of the ultimate load
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Tension: 0, 50% and 80% of the ultimate load
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Bending: 0, 30% 50% and 80% of the ultimate load
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Based on the results obtained:
- determination of apparent chloride diffusion coefficient and
- correction factor as function of load.
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3.1.2 Mechanical load and carbonation
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Preparation of the specimens
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Dimension
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100*100*400mm
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Curing
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7 days humid curing + 21 days laboratory atmosphere
(approximately 20 °C and 60 % RH)
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Carbonation
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Exposure to an atmosphere with 2 % CO2 and 75 % RH for 7 and 28 days, determination of carbonate profiles by grinding and chemical analysis
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Loading conditions
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Compression: 0, 30%, 60% and 80% of the ultimate load
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Tension: 0, 50% and 80% of the ultimate load
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Bending: 0, 30% 50% and 80% of the ultimate load
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Based on the results obtained:
- determination of carbonate profiles and
- correction factor as function of load.
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3.2 Details of test rigs
3.2.1. Design of test rigs
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Test rig
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Sketch
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Deadline
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Compression
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Dr. Wang, F. H. Wittmann and E. Schlangen
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Dec. 31, 2012
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Tension
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Dr. Wang F. H. Wittmann and E. Schlangen
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Dec. 31, 2012
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Bending
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CBMA
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Dec. 31, 2012
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3.2.2 Processing of test rigs
(1) Distribute the sketch of the rigs + the minutes of meeting by Dec. 31. Collection of the comments on the test rigs until Jan. 31, 2013.
(2) CBMA will finish all the three test rigs before May 2013.
(3) CBMA plans to offer 2 to 5 test rigs to selected laboratories, one in Europe, one in Japan or the US, the other in China. More test rigs can be built according to the design.
4. Plan for the next meeting (Qingdao Meeting)
(1) Qingdao Meeting shall be held at May 23 to 24, 2013. The meeting room shall be arranged at Qingdao Technological University by Prof. Zhao. For accommodation Shangri-La Hotel is recommended.
(2) At Qingdao Meeting, the three test rigs and test methods will be introduced to all the members of TC-TDC.
(3) If the test rigs are generally accepted the detailed plan for the comparative test series shall be fixed.
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