Effects of Coarse and Fine Crushed Clay Brick Content on the Compressive Strength of Recycled Aggregate Concrete and the Microscopic Mechanism

Figure 9

Microscopic morphology of NAC and RAC with 0% or 60% coarse crushed clay bricks at the age of 28 d (magnified 3000 times).

(a) 28 d NAC

(b) 28 d RAC with 0% crushed clay bricks

(c) 28 d RAC with 60% coarse crushed clay bricks