Table 2: Physical and mechanical properties of coarse RCA.

Particle size (mm) Apparent density
(kg/m3)
Pile-up density
(kg/m3)
24 h water absorption (%) Content of needle pieces (%) Mud content (%) Porosity
(%)
Crushed index (%)
5~20 2660 1410 3.7 1.4 0.4 47 13.5