June, 2022
This message is only relevant if you are using Nurse-Saul maturity (time*temperature) in combination with the Fahrenheit temperature unit.
All other combinations of maturity methods and temperature units work correctly. That also applies for Nurse-Saul's equivalent time maturity.
The error
This error occurs in versions 4.01 and 3.xx and is now fixed.
The established heat development curve is described by a number of pairs (maturity, heat development).
The error is that the maturity values for the determined heat generation curve are not correct. All maturity values have been divided by the factor 1.8.
The erroneous heat generation curves can thus be corrected by multiplying all the abscissa values by a factor of 1.8.
Alternatively, the heat generation curves can be determined again using this corrected version of the software.
The consequence
Using the erroneous heat of development curve gives the right amount of energy overall, but it is released too fast compared to the right concrete.
As a consequence the temperature course in a construction will result in higher temperatures in the calculations than in the real structure.
This also means that the calculated maturity is achieved faster than the maturity in the real structure.
Thereby, this error will lead to overestimation of strengths at a given time.
The algorithm that generates the element mesh in the Heat-Box software has been updated.
This means that if you recalculate previous models you will not get the exact same results again.
Minor inconveniences have been corrected