Comparação de custos de pilares com uso de concreto de alto desempenho em relação ao uso de concreto convencional em um edifício residencial de 4 pavimentos

Abstract

Reinforced concrete is the most used construction material nowadays, and several improvements are constantly being studied, such as the development of High Performance Concrete. This type of concrete usually provides lower permeability, greater durability, higher strengths, reduced sections and consumption of materials, and, consequently, savings for buildings. Nevertheless, the high initial cost has limited the use of High Performance Concrete to special and large buildings. This research aimed to analyze if there is financial viability in the use of High Performance Concrete, replacing Conventional Concrete, in columns of small buildings, more specifically, of 4 floors. Using an architectural project, the columns were modeled, analyzed and designed in two models using the Scia Engineer software, considering the ABNT NBR 6118. The Model I with the whole structure in Conventional Concrete 25 MPa and the Model II with the columns in High Performance Concrete 50 MPa, keeping the other elements with 25 MPa. With the help of the SINAPI table and market values in the region, it was possible to compare the costs of the columns of each model, verifying a decrease in the amount of materials, which resulted in a savings of 15.70% in the columns with the use of High Performance Concrete.