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Matéria (Rio de Janeiro)

versão On-line ISSN 1517-7076

Resumo

MONTILLA, Trino Baloa; MOGOLLON, Carlos Arellano; GOMEZ, Juan De Abreu  e  ARBOLAEZ, Idalberto Aguila. Automotive waste oil as an additive in concrete mixtures: its use is feasible. Matéria (Rio J.) [online]. 2019, vol.24, n.2, e12343.  Epub 10-Jun-2019. ISSN 1517-7076.  https://doi.org/10.1590/s1517-707620190002.0658.

Finding a use for Automotive Residual Oil (ARO) is preponderant for society, since one liter of this liquid is capable of contaminating one million liters of drinking water, without counting the damages to agricultural soils and groundwater. The purpose of this work is to study the physical and mechanical properties of concrete by incorporating ARA in dosages between 0.10% and 0.80% by weight of cement. To achieve this goal, settlements of fresh mixtures and resistances of hardened concrete were obtained for different dosages of ARO. From the resistances obtained after 28 days, a polynomial regression curve is presented that allows obtaining an optimum value of ARO, this value is used in the air content and setting time tests for fresh concrete. While for the hardened concrete tests were carried out resistance to compression, tensile, ultrasonic pulse speed, absorption and adhesion developed between concrete and bars with projections. The results indicate that dosages of ARO between 0.10% and 0.30%, provide greater resistance to compression of the concrete, with an optimum dose of 0.14%. When using the optimal dose of ARO it was validated that all but two of the tests carried out in this study are similar to the control concrete, the exceptions were the resistance to compression that increases by 8% and the adhesion developed between the concrete and, bars with projections decreases by 9%. Therefore, it is concluded that the use of ARO as an additive in concrete, at 0.14% by weight of cement, is feasible in non-structural concrete mixtures, specifically in curbs, rigid pavements, sidewalks, blocks, pavers and paths pedestrian Being the use of the ARO as an additive, a significant contribution to reduce the damage it generates to the ecosystem.

Palavras-chave : automotive residual oil; adhesion; additive; rebar; concrete.

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