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Chemical analysis of the jidden aggregate from the Rio doce and its influence on the durability, strength and carbonation of the concrete

2021; Volume: 1; Issue: 2 Linguagem: Inglês

10.22533/at.ed.3172109121

2764-1317

Claudinei A. Montebeller, Luan Rangel dos Santos, Lucas Soares Milanez, Adriana Zamprogno,

Construction Engineering and Safety

This work aims to evaluate the influence of the fine aggregate extracted from the Rio Doce river in the possible appearance of pathologies of the concrete, since the river has a history of contamination by substances from mining waste.The probability of the emergence of pathologies in the concrete can be high depending on the physical and chemical characteristics of the fine aggregate used, such as the corrosion of the concrete and the reinforcement, putting its durability at risk.As the Rio Doce is the largest granulometric source of civil 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 selected, in addition to Rio Doce, being them the Pancas , the Santa Maria and the Santa Joana rivers, in order to raise comparative and qualitative parameters between them.The concrete samples were submitted to axial compression strength tests, carbonation test and corrosion potential test through electrochemical method, being possible to evidence that, among the mentioned rivers, Rio Doce presented low values of carbonation velocity and results lower in the reinforcement corrosion potential test.The results obtained indicate that there is no influence of the contamination history of Rio Doce with the values presented in the tests.