Function
- Define heat source of concrete to model the amount of heat generated during hydration.
Call
From the main menu, select [Load] tab > [Type : Heat of Hydration] > [Heat of Hydration Analysis Data] group > [Heat Source] > [Heat Source Functions]
Input
Add : Click to define a new heat source function.
Modify : Click to modify a previously defined heat source function.
Delete : Click to delete a previously defined heat source function.
Close : Click to close the dialog box.
Heat Source as a Constant
Heat source function with constant type dialog box
Function Name : Enter the name of the heat source function.
Heat Source : Define the constant heat source over time.
Heat source function defined by Code
Adiabatic temperature rise defined by Code is used. The factors affecting the adiabatic temperature rise are defined such as the type of cement, unit cement content, use of admixture, and casting temperature.
Heat source function with code type dialog box
Function Name : Enter the name of the heat source function.
Function
Maximize adiabatic temp. rise (K) : varies with Code
Reactive velocity coefficient (a) : varies with Code
Use Concrete Data : Calculate Maximum adiabatic temperature rise and reactive velocity coefficient based on the concrete information.
Cement type : Select cement type
Temperature : Specify concrete pour temperature.
Cement Content : Specify the amount of cement content per unit volume.
When User is selected
The user can directly define the heat source function by selecting User Type. The heat source function can be inputted in a table format for two cases - either Heat Source or Temperature.
Heat Source : Internal heat generation rate per unit volume per unit time due to concrete hydration.
Heat source function with user type (Heat source) dialog box
Temperature : To calculate the heat generation of concrete, it is necessary to differentiate the temperature and multiply it by the specific heat and density. In order to define the heat generation properties of concrete based on experimental data, midas Civil has added a feature to directly input measured temperatures to define the heat generation characteristics.
Heat source function with user type (Temperature) dialog box