Avaliação do risco relativo à qualidade e ao custo de obras paralisadas de HIS no estado de Goiás

Abstract

The housing deficit in Brazil, estimated, corresponds to 7.78 million households, in Goiás it is around 156 thousand families in deficit conditions. In the scope of paralyzed public constructions, in 2018 there were 4,669 paralyzed constructions in the national territory, corresponding to more than 135 billion paralyzed investments. In Goiás, there are 121 paralyzed constructions that are equivalent to more than 2 billion reais, according to the 2019 records of the TCE, in the case of social interest housing projects, there are approximately 1,549 housing units in this situation. A construction is exposed to the action of degradation agents immediately after its completion, or execution of the last service up to the point of stoppage, which can result in loss of performance, durability and service life. The external elements of a construction are the critical elements, they act as the first barrier to the action of degradation agents, their degradation causes visual discomfort and impacts the quality of the urban environment. The objective of this work is to propose a method to assess the risk to quality and cost in paralyzed constructions. To verify the risk to quality, Gaspar and Brito's methodology was adapted, where the global degradation level of the elements of a building is quantified through the degradation indicators for the non-conformities detected and selected for the study. The risk to cost is verified from the cost of recovery, when the construction is resumed. A field survey form was proposed for the standardization of the on-site survey, the characterization of non-conformities and their level of degradation. The proposed documentation covers the external construction elements: mortar coating, metal frames and roofing. The non-conformities are: staining, displating, cracking, oxidation and dehelping. For validation, the method was applied to na enterprise of 49 (forty-nine) housing, a construction started in 2012 and stopped since 2016. Checking the UH 5 of this project, a risk to quality of 185% was obtained, a risk to the cost of R $ 2,436.60, being classified as a very serious risk. The conclusion of this same HU would cost R$ 23,639.13, in 2019, adding to the services performed previously, the final cost would be R$ 40,592.22, which is equivalent to 45% more than expected in 2011, i.e., the final cost of one HU would give to build half a HU, for example, for this undertaking of 49 HU’s, would give to build another 25 HU’s.