HOMEPAGE ABOUT RILEM ABOUT TC 246-TDC SPECIFIC TASKS MEETINGS PLAN & ACTIVITIES ACHIEVEMENTS 关于RILEM
MEETINGS
Tenth Meeting of TC 246-TDC, Lyngby, Aug. 23, 2016
Ninth Meeting of TC 246-TDC, Shenzhen, June. 29-30, 2016
Eighth Meeting of TC 246-TDC, Beijing, Oct. 16, 2015
International Seminar on Durability of concrete under combined mechanical and environmental actions in Beijing, October, 2015
Seventh Meeting of TC 246-TDC, Ghent, April 23-24, 2015
Sixth Meeting of TC 246-TDC, Munich, Nov. 27-28, 2014
Fifth Plenary Meeting of TC 246-TDC, Delft, April 28-29, 2014
Fourth Plenary Meeting of TC-TDC, Paris, Sept. 3, 2013
Third Plenary Meeting of TC-TDC, Qingdao, May 23-24, 2013
Informal Meeting of TC-TDC, Beijing, Nov. 28-29, 2012
Second Plenary meeting of TC-TDC, Cape Town, Sep. 2, 2012
First Plenary Meeting, Beijing May 15-18, 2012
Informal Meeting of TC-TDC, Qingdao, March 7, 2012
Inauguration meeting, Hong Kong September 4, 2011
CONTACT US
Chairlady: Prof. Yao Yan
Secretary: Prof. Wang Ling
Phone: 86-10-51167489
Fax: 86-10-51167954
E-mail: 626043162@qq.com; wangling@cbmamail.com.cn
Address: China Building Materials Academy, Guanzhuang Dongli 1#, Chaoyang District, Beijing100024, China.
 

Informal Meeting of RILEM TC-TDC in Beijing
Nov. 28th and 29th, 2012

Minutes

Time
13:30-17:30, Nov. 28th, 2012
08:30-12:30, Nov. 29th, 2012.
Venue
Meeting room at State Key Laboratory of Green Building Materials, China Building Materials Academy
Main Subjects
Tasks of Group A:
1. Deadline for collection of papers.
2. The annotation of the bibliography.
3. Next steps of Group A.
Tasks of Group B:
1. Comparative test methods
2. Sketch and processing of test rigs
3. Next steps.
Participants
All together 7 persons attended the meeting:
Prof. Yao Yan, Prof. F. H. Wittmann, Prof. Wang Ling, Dr. Wang Zhendi, Ms. Tan Li, Zhou Chunying, and Cao Yin
Moderator
 
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
Chapter
Person in charge
1.1 Chloride penetration and mechanical load
Prof. Wittmann F.H.
1.2 Carbonation and mechanical load
Prof. Wittmann F.H.
1.3 Chloride penetration and Freeze-thaw attack
Dr. Zhang P.
1.4 Carbonation and freeze-thaw attack
Dr. Jiang FX.
1.5 Thermal action and mechanical load
Prof. Khelidj A.
1.6 Sulfate attack and mechanical load
Prof. Xing F.
1.7 Cracks and accelerated migration
Dr. Zhang P.
1.8 Corrosion under combined actions
Prof. Weiss W. J.
1.9 Leaching and mechanical load
Prof. Wittmann F.H.
1.10 Other load combinations
Prof. Glinicki M.
PART II : THESES
Prof. Schlangen E
PART III: BOOKS AND REPORTS
Prof. Schlangen E.
Deadline: End of March, 2013
 
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
Preparation of the specimens
Dimension
100*100*400mm
Curing
Under water for 28 days
Chloride
Exposure to 5% NaCl solution, chloride diffusion for 7 and 28 days, determination of chloride profiles by grinding and chemical analysis
Loading conditions
Compression: 0, 30%, 50% and 80% of the ultimate load
Tension: 0, 50% and 80% of the ultimate load
Bending: 0, 30% 50% and 80% of the ultimate load
Based on the results obtained:
-          determination of apparent chloride diffusion coefficient and
-          correction factor as function of load.
 
3.1.2 Mechanical load and carbonation
Preparation of the specimens
Dimension
100*100*400mm
Curing
7 days humid curing + 21 days laboratory atmosphere
(approximately 20 °C and 60 % RH)
Carbonation
Exposure to an atmosphere with 2 % CO2 and 75 % RH for 7 and 28 days, determination of carbonate profiles by grinding and chemical analysis
Loading conditions
Compression: 0, 30%, 60% and 80% of the ultimate load
Tension: 0, 50% and 80% of the ultimate load
Bending: 0, 30% 50% and 80% of the ultimate load
Based on the results obtained:
-          determination of carbonate profiles and
-          correction factor as function of load.
 
3.2 Details of test rigs
3.2.1. Design of test rigs
Test rig
Sketch
Deadline
Compression
Dr. Wang, F. H. Wittmann and E. Schlangen
Dec. 31, 2012
Tension
Dr. Wang F. H. Wittmann and E. Schlangen
Dec. 31, 2012
Bending
CBMA
Dec. 31, 2012
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.