Residual Compressive Strength of High-Strength Concrete Exposed to Elevated Temperatures

Table 5

Values of constants C1 to C7 for the proposed regression models.

Constant	Model 1	Model 2	Model 3	Model 4	Model 5	Model 6
C1	0.018	0.041	0.021	0.053	−0.2074	0.234
C2	−0.027	1.331	−0.030	1.254	0.0150	0.644
C3	0.002	−0.120	0.002	—	−0.0005	—
C4	−0.036	−0.267	—	—	—	—
C5	−0.168	0.021	—	—	—	—
C6	−0.006	−0.239	—	—	—	—
C7	−0.092	—	—	—	—	—