CARACTERIZAÇÃO E AVALIAÇÃO DAS PROPRIEDADES DE CONCRETOS AUTOADENSÁVEIS COM ADIÇÕES MINERAIS E BAIXO CONSUMO DE CIMENTO.

The self-compacting concrete (SCC) has a high content of fine materials and has been widely used due to its characteristics of high fluidity and cohesion. Fines from industrial waste or by-products may be used for the sake of sustainability, considerably reducing the consumption of cement associated with the possibility of maintaining or improving mechanical or durability properties. In this way, this article aims to study the properties of concrete in the fresh state and hardened state, analyzing the feasibility of the development of SCC made with high levels of mineral additions. For this, the cement was replaced by mineral additions (sugar cane biomass residue or pozzolan from rice husk and metakaolin) in the 50% content, based on the reference trait, which consumes 442.6 kg/m3 of cement, giving new traits with cement consumption between 215.9 kg/m3 and 216.2 kg/m3. The SCC were characterized in the fresh state by the Slump-Flow Test, T500, J-ring, V-funnel and L-box assays, assessing the influence of the insertion of the additions on the rheological properties and the superplasticizer additive consumption. In order to evaluate the mechanical performance of the SCC, compressive strength tests were performed. The SCC with mineral additions presented satisfactory mechanical performance. [ABSTRACT FROM AUTHOR]