C20/25,XC1,31.5,S3 - C25/30,XC2,XC3,31.5,S3 - C30/37,XC4,XF1,31.5,S3

Concrete is a material formed by mixing cement, coarse and fi ne aggregate and water, with or without the incorporation of admixtures and additions. Fresh concrete is manufactured at ready-mix batch plants and is delivered to the construction sites in a liquid state. Fresh concrete is placed, compacted and hardened in the desired shape, via a chemical reaction: the hydration of cement. The cement is the binding agent in concrete: it is a finely ground powder that when hydrated forms a paste that sets, hardens, and adheres to other materials and after hardening retains its strength even underwater. It is used as the main raw material in the production of concrete, mortar, grouts and plasters.