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CemGEMS web app

Version 0.8.0 beta

Accessing CemGEMS

CemGEMS web app is accessible anywhere, anytime, in any web browser (except Internet Explorer) by navigating to

Internet access is required to log in (log out) and to equilibrate recipes or simulate processes.


CemGEMS v.0.8.0 beta, see changelog, does not contain breaking changes relative to v.0.7.1. To get CemGEMS working properly after upgrade (March 11, 2024), you only need once to log out and then log in. Now you can conveniently customize the process simulation plots (see Plots: Customization and export). The plots will remain customized until the process simulation is re-calculated. It is good to have all the relevant data (hydration model parameters, span targets and intervals, time intervals) available e.g. in a spreadsheet file. This can eventually help restoring processes that use mP&K and/or 5PL built-in models with parameters that you have modified. In case of problems, try to clean up the application memory in the browser as described in the troubleshooting page, and login again. Due to continuing development, the chance of breaking changes and partial loss of user data upon upgrades may persist until the final v.1.0.0 release.


The CemGEMS web app can compute isothermal and adiabatic heat effects of cement hydration. These calculation results are in part approximate and should be viewed as provisional only, until a sequence of testing, benchmarking and verification steps is completed in future releases.

Next steps: Getting started

Provide your feedback

Dear User! Your feedback is paramount for the developers to make CemGEMS web app truly useful, funny and pleasant to work with. To assist you, we provide a button with a dialog, as shown on this screen image:

Feedback form image

Clicking on "Compose email" button will open up your default email composer, where you can enter your text and attach screen images, or (better) put them onto your cloud drive and add the URL link to email that will go to admin