APPENDIX C
CALCULATION EXAMPLES
Developing Modified Adiabatic Temperature Rise Curves
As it is shown in Chapter 5, to develop the adiabatic temperature rise curves for
mass concrete mixes used in FDOT projects, ACI curves can be modified for total
cementitious materials, pozzolan content and placing temperature by using a modification
factor (k,). In this appendix, an example calculation to develop adiabatic temperature rise
curve for a given concrete mix is presented.
Mix Properties:
Cement Content = Co = 560 lb/yd3
Fly Ash Content = Cp = 240 lb/yd3
Placing Temperature = 73F
Concrete Mix With Portland Cement Type II
The applicable formula to calculate a, would be: ap= 0.59 0.59Rp.
Rp (percentage of pozzolan in the mix) is calculated as:
Rp = 240 / (560 + 240) = 0.30
Therefore cp would be determined as follows:
cp =0.59- 0.59 (0.3) = 0.41
In Chapter 5 (Equation 5-4) Ceqwas defined as:
Ceq = c + apCp
Therefore Ceq for the given mix equals to: