Mass Concrete Adiabatic Temperature Rise Screen (ACI 207)
Screens mass-concrete heat: rise = cementitious x coefficient / 100; peak = placing + rise. A rich 600 lb/cy mix at 12 degF/100lb gains 72 degF and, placed at 70 degF, peaks near 142 degF - past the ~35 degF differential that governs cracking, so it needs cooling. A leaner 400 lb/cy slag mix at 8 degF/100lb gains only 32 degF. A screen, not a thermal analysis; the mix data sets the coefficient and the EOR governs.
Formula and source
delta_t_f = cementitious_lb_per_cy x rise_f_per_100lb / 100; peak_temp_f = placing_temp_f + delta_t_f; exceeds_screen = delta_t_f > diff_limit_f.
ACI 207 adiabatic temperature-rise identity by name (rise = cementitious x coefficient; peak = placing + rise); a first-order screen.
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