The results revealed that the modulus of elasticity of recycled aggregate concrete with and without
GBA was lower than that of conventional concrete by approximately 19%. GBA can be used effectively
to reduce the water permeability of recycled aggregate concrete. The increase of GBA content in recycled
aggregate concrete results in a significant decrease in chloride penetration depths. In addition, the
mechanical properties and durability of recycled aggregate concrete were efficiently improved by using
20% of GBA in the concrete mixtures