reinforced concrete
US /ˌriːɪnˌfɔːrst ˈkɑːŋkriːt/
UK /ˌriːɪnˌfɔːrst ˈkɑːŋkriːt/

1.
concrete in which steel bars or mesh have been embedded to strengthen it
:
•
The bridge was constructed using reinforced concrete.
•
Many modern buildings rely on reinforced concrete for structural integrity.