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CemGEMS media

Hands-on training #1

Recorded chat (anonymized, with some deletions and corrections)

  • 13:52:56 : a good addition to phaseAliases list would be to have a column with the chemical formula
  • 13:57:48 : User friendly version! Very good job.
  • 14:00:25 : I was computing just a second ago ;-) !
  • 14:00:33 : Me too :)

  • 14:00:36 : me too

  • 14:00:38 : same here :)
  • 14:00:43 : I did ! Took 10 sec !
  • 14:00:45 : +1
  • 14:00:50 : +1
  • 14:00:52 : me too it took around 15 s
  • 14:00:56 : +1
  • 14:01:01 : +1
  • 14:01:05 : The same, very effective.
  • 14:01:05 : +1
  • 14:01:31 : I do not get the HYDRATION-MPK option
  • 14:01:57 : see that the initial recipe is not XRF
  • 14:02:22 : XRF has no minerals so one cannnot use MPK
  • 14:03:09 : recipe type CEM-II-BV::min::init
  • 14:03:32 : I used min.
  • 14:03:33 : has to be ::min:: not ::xrf::
  • 14:04:00 : when I choose CEM-II-BV cement type, in process type there is no Hydration-PK option
  • 14:04:18 : try to logout and in again
  • 14:04:59 : I have the same issue!
  • 14:05:18 : Try change XRF to minerals
  • 14:05:19 : Me too. Problem solved when log out and log in again
  • 14:05:36 : I re-log in and the problem is solved
  • 14:06:05 : Cheers workd!
  • 14:06:45 : Problem solved when log out and log in again
  • 14:06:50 : thanks
  • 14:07:17 : log-out and log-in makes sure you have the latest updates of CemGEMS, don't worry your calculations are safe.
  • 14:10:59 : note that P+K is for longer hydration times only (>1 day); if you want to model early reaction (and thus calorimetric curves) one would better use another kinetic input
  • 14:11:45 : which input would you suggest for early reaction? (calorimeter data?)
  • 14:12:59 : after 10h is 0.35
  • 14:13:36 : one could adapt the 5PL to fit the early hydration data (instead of using P+K), however I have not done that
  • 14:13:52 : Calorimetry is a sum of all phases reacting. I suggest taking experimental data (QXRD) and using 4PL or 5PL.
  • 14:13:55 : ok thank you :)
  • 14:15:50 : What is the difference between the process "hydration -MPK" and "hydration"?
  • 14:17:06 : Hydration MPK describes hydration using P+K. Hydration uses a linear reaction progress.
  • 14:18:06 : M stands for mineral (based on phases and not on oxides)
  • 14:18:54 : Carbonaiton is working fine on my side :-) !
  • 14:19:02 : +1
  • 14:24:19 : In future releases, the step should be set to auto by default. Then the users don't need to change the number of steps when modifying the interval and stepsize.
  • 14:25:13 : ok, thanks, I was confused with that M as well :)
  • 14:27:06 : Is there any option for adding pitzer model in this?
  • 14:30:01 : Raise Hand (from Reactions) is you have questions
  • 14:31:48 : we (=Kulik, Winnefeld and Lothenbach) are about to write an article for RILEM letters, which will describe the main processes and options, and give a comparison with GEMS, which might be of additional help in the future
  • 14:32:23 : Excellent
  • 14:32:36 : Yes that'd be excellent Barbara
  • 14:33:08 : Can you see the effect of fineness of Cement or SCMs?
  • 14:33:08 : Great tool made available to everyone !
  • 14:33:10 : @Barbara Lothenbach Great!!!
  • 14:33:17 : What about the confidentiality of data submitted to your servers ?
  • 14:33:39 : is it possible for the cemgems combine chloride and carbonation phases?
  • 14:34:55 : How to add specific minerals that are not in the list of aliases ?
  • 14:35:03 : Thanks for the great work, CEMGEMS team! For me there is more to learn than to question, but I do have one here: can we combine several processes, e.g. hydration + ingress, or leaching + ingress?
  • 14:35:30 : why there is calcium sulfate among the XRF data?
  • 14:36:22 : Can we add RH to study about the carbonation?
  • 14:36:49 : @ 14:35:30: this is just an option in case is needed, set it to 0 if you don't need it or delete it from the edit button.
  • 14:36:58 : How can I calculate a mixture of two different cement types, for example OPC and CAC?
  • 14:37:05 : thanks a lot.
  • 14:38:31 : is it possible to have two types of a mineral with different chemical formula (eg. belite with different ratio of Ca/Si/Ti/..)?
  • 14:39:27 : Waouh ! The system is even converging when the amount of water is under stoichiometric ! Congrats !
  • 14:40:06 : the idea of using templates is that one can do meaningful calculations with just a few clicks. Of course each user should make changes for his specific composition/recipe.
  • 14:40:23 : @ 14:38:31: Yes, possible. You can duplicate the Belite in the JSON editor and change composition of the duplicated one.
  • 14:40:33 : @ 14:39:27: yes, it calculates, but in reality the reaction of the clinker will stop before that :-)
  • 14:41:03 : @ 14:40:23: thank you!
  • 14:41:21 : Can we extract saturation index values (and its variations) of different phases during the process simulations?
  • 14:43:55 : I did not see the volume of pores in the result, am I wrong? Thanks.
  • 14:45:52 : Is it possible to send feedbacks if someone does not use a mail client but rather webmails?
  • 14:48:29 : How about couple hydration with carbonation/leaching?
  • 14:49:01 : is it possible to get the saturation index of the different phases after modelling? is it possible as well to change the C-S-H models, from CSHQ model to The CNASH_ss thermodynamic model?
  • 14:50:51 : Because the Debye-huckel eq. can not account for high ionic strength then pore solution analysis are only qualitative and not quantitative?
  • 14:52:29 : The DH equation is valid to up 1-2 M; while pore solution in most cases will have around 0.5 M; thus well within the validty of the DH model
  • 14:53:32 : Practical question: is it possible to change the axis titles of the plots?
  • 14:54:36 : @14:53:32 I think you can export data in csv format to use it in excel or something else...
  • 14:57:46 : I notice that the phosphate phases are included here with the usual Portland cement phases. Did you merge cemdata18 with the phosphate database from Barbara‚Äôs recent paper? Is that merged database available somewhere?
  • 14:58:43 : yes, we did merge cemdata database with phosphate data and Na and Ca-zeolite database recently published :-)
  • 14:59:25 : Is it downloadable from your website? I put the phosphate database in manually to GEM-Selektor but it is not complete.
  • 14:59:42 : Thanks a lot to the whole team !
  • 15:00:01 : the databases are all available at www.empa.ch/cemdata in GMES and in PHREEQC format (in 3 parts, which you can easily combine)
  • 15:00:19 : Oh, I need to go check that. Thanks.
  • 15:00:55 : thanks a lot
  • 15:00:59 : Excellent work. Thanks for the CEMGEMS and this introductory session. Well done !
  • 15:01:00 : Thank you Dmitrii and team. Gotta go
  • 15:01:07 : Thank you Dmitrii + Team for this very interesting hands-on workshop! I learned a lot and am looking forward using cemGEMS for one of our projects soon!
  • 15:01:15 : Thank you :) looks great!
  • 15:01:23 : Thank you!
  • 15:01:41 : Thank you :)
  • 15:01:43 : Thank you!!!!
  • 15:01:45 : Thank you!
  • 15:01:48 : Thank you
  • 15:01:52 : Very nice interface! Thank you
  • 15:01:53 : Thanks to the developers! Really nice and user friendly :)
  • 15:01:56 : Thanks very much!
  • 15:02:04 : Thanks a lot! Congratulation to the CemGEMS team for the fantastic job!
  • 15:02:06 : Very nice and useful tool for the "modelling community"
  • 15:02:12 : Thanks Dmitrii and the team
  • 15:02:13 : thank you all..
  • 15:02:15 : Thank you
  • 15:02:24 : Thank you very much
  • 15:02:30 : Thank you!
  • 15:02:31 : Thank you !
  • 15:02:33 : Thank you Dmitrii for the workshop. Have a great weekend everyone. Niall
  • 15:02:37 : Very interesting. Looking forward to using it
  • 15:02:39 : Thank you it was great!
  • 15:02:48 : Thank you !

Last update: March 17, 2021