Incorpora??o da cinza do baga?o de cana-de-a?úcar sem moagem no concreto em diferentes dosagens

摘要

In the burning process of sugarcane bagasse, the creation of ashes occurs, which are later allocated in large courtyards. The correct destination of this residue is of great environmental importance. Sugarcane bagasse ash (SCBA) is predominantly composed of silicon dioxide, that due to their physical-chemical characteristics provide pozzolanic properties to the material. Thus, it is hypothesized that it can be used as a raw material in the partial replacement of Portland cement for the mortars and concretes production. The present study aimed to evaluate the concrete characteristics with addition of SCBA in partial replacement of Portland cement in different dosages. Tests were carried out without addition and with replacement of 10, 20 and 50% of cement mass by SCBA. The results indicate that the resistance to simple compression is modified when the treatments with different dosages are compared. The 10 and 20% replacement of the cement mass by SCBA, presented resistance values to compression above 14 MPa, being statistically equal. Therefore, it is concluded that there is technical feasibility for cement replacement by SCBA in concrete.