Modeling of Corrosion Rate and Resistivity of Steel Reinforcement of Calcium Aluminate Cement Mortar

Table 1

Variable levels.

Level parameters	Lower value (−1)	Central value (0)	Higher value (+1)
X1 = T (temperature)	20°C	40°C	60°C
X2 = w/c (water-cement ratio)	0.35	0.42	0.50
X3 = Cl^− (chloride concentration)	0.5 M	1 M	1.5 M