Estudo comparativo de custos entre os sistemas construtivos de alvenaria estrutural e de paredes de concreto moldadas no local para edifícios residenciais

Abstract

The present work aims to present a comparative study of costs between two construction systems, namely: structural masonry and cast-in-place concrete walls. For the elaboration of this, two architecturally identical projects were considered, A and B. The latter being built on cast-in-place concrete walls and the former on structural masonry, both located in the Paraná city of Londrina. Civil construction is one of the pillars of the Brazilian economy and impacts all social classes, therefore, the search for new technologies that aim to reduce the final sale price and increase productivity, while offering quality to its users, is fundamental. The construction method of cast-in-place concrete walls is known for being a technological option that offers all the advantages that a construction methodology focused on the production of large-scale buildings requires, such as speed of execution, guarantee of meeting deadlines, industrialization of the process, greater quality control and reduced manpower. This fact motivated this study, to compare in a real situation, which of the projects has the lowest cost of execution. Therefore, using the projects of the enterprises in question, survey of quantitative inputs, price quotations for materials and labour in the region of Londrina-PR and cost for the acquisition of metallic forms for the walls, as it is an initial investment of great impact, a cost comparison was made between the two executive methods. It was found that with the executive system of cast-in-place concrete walls, the construction company responsible for the works will have savings, especially if the same project becomes a standard and is used in other projects, só the cost of the metallic forms can be diluted between them.