Table 1
Conditions and variables of experiment
Conditions Variables
W/C (%) 25
Target void ratio (%) 20, 25, 30
Target flow (%) 200
Aggregate Crushed and recycled aggregate
Gradation: 5–13 mm
Content of recycled aggregate (vol.%) 30, 50, 100
Test items
Physical and mechanical properties Void ratio
Sound absorption coefficient
Compressive strength Method of impedance tubes Method of reverberation room