If an element was removed from the chemcial system, create a new single calculation from scratch with the missing element

[1357wnt581]

Why, when I adopt the Parrot model for PC cement from the official example, the Ferridel phase is automatically suppressed after checking and running calculations in SysEq upon adding NaCl. In contrast, significant AFt phases form when sodium sulfate （Na2SO4) solution is introduced. However, this issue does not occur with the default PC cement system; direct precipitation of the Ferridel phase can be observed after NaCl addition.

Even if I manually re-enable the Ferridel phase and Kuzel’s salt phase, they are still automatically disabled after running the Check process in SysEq.
Lastly, I would like to ask one further question. When preparing cement paste by configuring corresponding mixed solutions, is it sufficient to only add (\boldsymbol{NaCl}) and (\boldsymbol{Na_2SO_4}) directly in SysEq, without any additional settings in the Process module?
Additions defined in the Process module are generally regarded as external chemical erosion rather than mixing water incorporated directly into fresh cement paste. In contrast, solutes added directly within SysEq represent the ions contained in the mixing water.
Notably, most official benchmark examples introduce salts through the Process module in the later reaction stage. Therefore, I urgently need to confirm the correct operation logic for my simulation.

[1357wnt581]

hope fast answer,now I need solution

[gdmiron]

you probably need to make a new SysEq with all the elements in the system that you need. Probably the Ferridel phase and Kuzel’s salt phase are eliminated because Cl is not in the system. The "easy" way is to make new SysEq with all input from the old plus NaCl then go to process clone the one you want to use but select the new SysEq as the basis

[1357wnt581]

The official Parrot calculation case has all parameters pre-configured. I have added both {NaCl} and {Na2SO4} directly in the initial SysEq system. The {Na2SO4} related AFt hydration products can form normally. However, Cl‑bearing phases such as the Ferridel phase and Kuzel’s salt are automatically disabled after Check, even if I manually enable them in advance. No chlorine-bound hydration products appear after calculation. In comparison, when using the default PC cement system with only NaCl addition, these chloride phases can precipitate stably as expected.

I have add it，but it have not any change

[1357wnt581]

Lastly, I would like to ask one further question. When preparing cement paste by configuring corresponding mixed solutions, is it sufficient to only add (\boldsymbol{NaCl}) and (\boldsymbol{Na_2SO_4}) directly in SysEq, without any additional settings in the Process module?
Additions defined in the Process module are generally regarded as external chemical erosion rather than mixing water incorporated directly into fresh cement paste. In contrast, solutes added directly within SysEq represent the ions contained in the mixing water.
Notably, most official benchmark examples introduce salts through the Process module in the later reaction stage. Therefore, I urgently need to confirm the correct operation logic for my simulation.This is important for me

[gdmiron]

if NaCl was not in the original SysEq then adding it will not work. You need to make a new SysEq with the green + button, add all the elements + NaCl then click check and equillibrate.

When preparing the mixture it is sufficient to add your composition in SysEq these will be automatically taken into the process. Everything that is in the system is take by the process as is defined in the SysEq, in the proces you can change things from SysEq at each step - what you don't change will be left as it is and used in the calculation.

[1357wnt581]

I have got your answer，I have another problems.
Lastly, I would like to ask one further question. When preparing cement paste by configuring corresponding mixed solutions, is it sufficient to only add (\boldsymbol{NaCl}) and (\boldsymbol{Na_2SO_4}) directly in SysEq, without any additional settings in the Process module?
Additions defined in the Process module are generally regarded as external chemical erosion rather than mixing water incorporated directly into fresh cement paste. In contrast, solutes added directly within SysEq represent the ions contained in the mixing water.
Notably, most official benchmark examples introduce salts through the Process module in the later reaction stage. Therefore, I urgently need to confirm the correct operation logic for my simulation.This is important for me

[gdmiron]

I don't know if I understood your question. You can add NaCl and Na2SO4 in the SysEq then they will react from the first process step until the last process step. If you want to add NaCl and Na2SO4 later in the process then you need to define this in the process.

[1357wnt581]

I intend to simulate the preparation of cement paste using mixed salt solutions containing NaCl and Na₂SO₄. I want to clarify the difference between adding NaCl and Na₂SO₄ in SysEq and adding them through the Process module. Specifically, I would like to confirm whether adding these salts directly in SysEq represents using the ion-containing solution as mixing water for cement paste preparation. In contrast, is salt addition defined in the Process module only intended to simulate external ionic erosion via later immersion, rather than being incorporated directly as mixing water during paste proportioning

[gdmiron]

when adding NaCl and Na₂SO₄ in SysEq they will be used for reaction in the first calculation step, as if "using the ion-containing solution as mixing water for cement paste preparation"