Table 8.

Correlation between different pore sizes and compressive strength or elastic modulus of recycled concrete.

Item	Different Pore Size
	<20 nm	20~50 nm	50~200 nm	>200 nm
Compressive strength	0.827	0.987 **	−0.887 *	−0.995 **
Elastic modulus	0.782	0.893 *	−0.827	−0.910 *

Note: ** The correlation was significant at level 0.01 (two-tailed). * The correlation was significant at level 0.05 (two-tailed).