Material properties concrete & insulation materials,
Question:
Hi,
Could you please clarify the following:
To calculate the heat of hydration in our old software system we would just take the heat of hydration of the cement as shown on the technical data file of the cement (e.g. 260 kJ/kg) and multiply it with the cement content of 1m³ of concrete. This would give something like:
260 * 350 = 91000 kJ/m³ concrete.
How can I convert this correctly to the unit system used in Midas?
For the concrete:
We would like to use the following unit system:
So what would be the values to use in the material properties? (specific heat & heat of hydration)
And what about other materials, e.g. insulation materials (boundary conditions), do you maybe have some kind of material library with the values of different material as they should be used in Midas?
Looking forward to your reply.
Hi,
Could you please clarify the following:
To calculate the heat of hydration in our old software system we would just take the heat of hydration of the cement as shown on the technical data file of the cement (e.g. 260 kJ/kg) and multiply it with the cement content of 1m³ of concrete. This would give something like:
260 * 350 = 91000 kJ/m³ concrete.
How can I convert this correctly to the unit system used in Midas?
For the concrete:
We would like to use the following unit system:
So what would be the values to use in the material properties? (specific heat & heat of hydration)
And what about other materials, e.g. insulation materials (boundary conditions), do you maybe have some kind of material library with the values of different material as they should be used in Midas?
Looking forward to your reply.
Answer:
Hello,
Thank you for your patience.
In midas Gen, the heat of hydration of the cement is defined in the Hear Source Function. And then assign the heat source on the elements.
And then, Convection coefficients are entered in consideration of insulation materials type, thickness, duration, curing method, surrounding wind speed, etc. The material thermal conductivity is entered in the convection coefficient function and applied them to the structure as the boundary condition.
Thank you.
Best regards,
Jihong Hwang
Thank you for your patience.
In midas Gen, the heat of hydration of the cement is defined in the Hear Source Function. And then assign the heat source on the elements.
And then, Convection coefficients are entered in consideration of insulation materials type, thickness, duration, curing method, surrounding wind speed, etc. The material thermal conductivity is entered in the convection coefficient function and applied them to the structure as the boundary condition.
Thank you.
Best regards,
Jihong Hwang
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