AVALIAÇÃO DAS PROPRIEDADES DOS CONCRETOS DE PÓS REATIVOS PRODUZIDOS COM CIMENTOS PORTLAND DE ALTA RESISTÊNCIA INICIAL E CIMENTO PORTLAND BRANCO ESTRUTURAL

Abstract

With the industrial development, the new technologies have been applied in the civil construction sector with the improvement of new materials and constructive methods that aim increasingly at the best performance of the structures, as well as the architectural and aesthetic aspect of the construction. The reactive powder concrete (RPC) is produced with low intensity and low porosity, and has been associated with a high performance concrete (HPC), due to the lack of grains in its composition, the internal residues of the mixture are eliminated, more homogeneous and resistant. Using a very fine material in its composition, the RPC resembles a mortar with greater intensity, which can be a construction of lighter and thinner parts, often with the use of steel plates. Another factor that is taken into account is the most modern and innovative constructions. In this way, this work had as objective a study of RPC dosage with the use of the structural physical conditioning and conditioning of high initial moisture resistance, in order to collaborate for the development of concrete with resistance to the architectural fins. In this research, they were analyzed as properties of each material constituted by the RPC, including the particle size characteristics and the section packing study, where it was later produced and performed by experimental tests after showing a comparison between the use of CPB and CPV or CPV ARI in RPC. The results selected in this research show that white cement had a performance 20% higher compared to gray cement, reaching compressive strength of 99.3 Mpa at 21 days. Simultaneously, a complementary procedure was performed, where the active silica was replaced by the CPB, ensuring the white aspect of RPC, maintaining its use for thin architectures, where it was possible a reduction of 26% in RPC resistance up to 14 days without incorporation of active silica.