CHEMICAL ANALYSIS OF THE JIDDEN AGGREGATE FROM THE RIO DOCE AND ITS INFLUENCE ON THE DURABILITY, STRENGTH AND CARBONATION OF THE CONCRETE

• DOI: 10.22533/at.ed.3172109121

• Palavras-chave: Concrete, carbonation, pathology,Rio Doce, aggregate kid.

• Keywords: Concrete, carbonatation, pathology, Rio Doce, fine aggregate.

• Abstract:

  This work aims to evaluate the influence of the fine aggregate extracted
  from Rio Doce on the possible appearance of concrete pathologies, since the river has
  a history of contamination by substances with mining tailings. The probability of the
  occurrence of pathologies in concrete may be high depending on the physical and
  chemical characteristics of the fine aggregate used, such as corrosion of concrete and
  reinforcement, putting its’ durability at risk. As Rio Doce is the largest granulometric
  source of construction in the city of Colatina, a better analysis of the characteristics of
  the concrete used in local constructions is essential. For the analysis, three rivers were
  chosen: Pancas, Santa Maria and Santa Joana in addition to the Rio Doce, in order to
  raise comparative and qualitative parameters among themselves. The concrete
  samples were submitted for an axial compression resistance test, carbonation test and
  corrosion potential test by electrochemical method, being possible to show that among
  other rivers, the Rio Doce presented low values of carbonation velocity and the most
  negative results in the corrosion potential test. Based on statistical analysis, it was
  possible to verify that there is no influence of the Rio Doce contamination history with
  the values found in the tests.

• Número de páginas: 12