Estimating Deterioration Rate of Some Carbonate Rocks Used as Building Materials under Repeated Frost Damage Process, China

Table 5

The decay constant (λ), half-life (N_1/2), and coefficient of correlation (R) of unconfined compressive strength (UCS).

Rock type	Unconfined compressive strength UCS (MPa)
	λ	N1/2	R
Limestone 1	−0.002	346.5	0.992
Limestone 2	−0.003	231.0	0.957
Limestone 3	−0.007	99.0	0.988
Limestone 4	−0.004	173.3	0.941
Limestone 5	−0.005	138.6	0.987
Limestone 6	−0.007	99.0	0.997