Experimental Study on the Effect of Large Temperature Difference on Compressive Strength and Pore Structure of Semirigid Base

Table 9

Fitting equations for semirigid base material under different temperature intervals.

Temperature interval	Relationship	Fitting equations
20°C ∼60°C	σc-N	σc = 18.445 – 1.007 N^−0.750
	ED-N	ED = 18788.943 – 5243.348 N + 558.736N^2 − 18.192 N^3
−20°C ∼20°C	σc-N	σc = 14.053 – 0.771 N^0.861
	ED-N	ED = 8313.630 N^−0.274
−5°C ∼−30°C	σc-N	σc = 8.956 + 0.226 N + 0.097N^2 − 0.005 N^3
	ED-N	ED = 2277.745 + 981.578N − 55.255 N^2