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

Table 11

NMR spectral area of semirigid base after different number of cycles at different temperature intervals.

Temperature intervals (°C)	Number of cycles (times)	Total area of T2 spectrum (cm^2)	Less harmful hole area (cm^2)	Harmful hole area (cm^2)	More harmful hole area (cm^2)
20∼60	0	905.89	823.738	40.939	41.213
	3	360.64	339.023	19.824	1.793
	6	1403.905	1257.177	121.987	24.742
	9	858.835	764.234	66.805	27.796
	12	390.767	332.972	37.589	20.207
−5∼−30	0	1029.081	974.708	48.98	5.393
	3	895.551	747.175	65.314	83.062
	6	890.148	765.157	80.847	44.144
	9	872.389	781.408	66.951	24.03
	12	501.842	476.357	25.485	0
−20∼20	0	894.658	806.581	88.077	0
	3	1027.467	875.112	152.354	0
	6	869.981	726.762	103.12	40.099
	9	1292.425	1010.037	162.551	119.837
	12	1305.531	949.593	208.309	11.308