Abstract: Held since 2004 in Recife, this symposium is one of the most traditional at CILAMCE. The general topics covered by the symposium are: Numerical modeling of concrete structures including buildings, bridges, nuclear power plants, foundations and special structures such as the cement sheath of oil wells and refractory concrete. The models may include several scales, from the nano scale to the macroscopic scale and encompass the thermal, chemical, and mechanical phenomena. The symposium comprises different types of cementitious materials such as bioconcretes, engineered cementitious composites (ECC), natural fiber reinforced concrete, ultra-high-performance fiber reinforced concrete, etc. Numerical analysis of phenomena that affect the durability of concrete like alkali-silica reaction and delayed ettringite formation, are also welcome in the symposium.