Controle estatístico do processo aplicado na produção do concreto estrutural in loco na cidade de Campo Mourão - PR

Abstract

The present work has its fundamental point on verifying the quality of structural concrete made in loco in Campo Mourão - PR, following the the Brazilian standard NBR 12655/2006 and the compressive strength of the analyzed property’s recommendations. The analysis consisted of comparing the strength of theoretical dosage (fck), described in ABCP / ICA method, with the breaking strength of the body proofs (fck est) made up on the spot. This survey was conducted within a work of a medium-sized construction, where 34 copies of random pillars were collected during the concreting process. Tests of sand and subsidence of the concrete’s stem. For the presentation of the trace used in work was carried out experiments to determine the households’ characteristics and measured the stretchers used for the concrete’s estimation. The body proofs were sent to the UTFPR’s lab - Federal Technological Paraná University - for their breakup after 28 days of curing submerged in water, the EMIC PCE100C machine. The results from the breakup of the pieces underwent a statistical analysis with the statistical process control tool’s aid. Given the values collected it was concluded the nonconformity of concrete produced in loco causing a rejection of the same according to NBR 12655/2006. Thus, there is an importance of monitoring the quality of concrete produced in loco for the concreted structure achieves satisfactory strength. Finally, it was suggested methods of analysis for extracting ultimate limit states’ testimonies and service of made with the purpose of ascertaining the actual structure’s efficiency, with the restrictions and measures to be taken to the reliability of the same.