Estudo comparativo entre o concreto autoadensável e o concreto convencional vibrado em obra vertical

Abstract

The use of self-compacting concrete (SCC) is gradually increasing in Brazil, although in vertical buildings its use has been more limited. The literature points out the advantages of SCC, such as decreases in concreting time and labor. However, few numerical data comparing SCC with conventional vibrated concrete (CVC) are available. Hence, the aim of this article is to make a comparative analysis between the two technologies in a vertical building. Data on noise, costs, concreting time, quantitative labor and machinery and tools were obtained. These data were transformed into indicators for comparison between the two technologies. With regard to the CVC, SCC provided a 60.7% improvement in labor productivity, with a 46.1% higher concreting rate, reducing construction noise by 10.6%, quantity of labor in 42.5% and the number of equipment and tools by 50%. However, SCC presented a higher cost than the CVC in 8.8%, which caused its infeasibility of use when considering only the direct costs.