plain concrete

plain concrete

[′plān kän′krēt] (civil engineering) Concrete without reinforcement but often with light steel to reduce shrinkage and temperature cracking.

plain concrete, unreinforced concrete

1. Concrete without reinforcement or reinforced only for shrinkage or temperature changes. 2. Concrete without some other specific admixture or element, in contrast with concrete containing such an admixture or element, e.g., non-air-entrained concrete.