APPLICATION OF PERMEABLE COATING IN ORDER TO REDUCE OBSTRUCTIONS IN THE COVERING OF DRAINAGE ELEMENTS

• DOI: https://doi.org/10.22533/at.ed.3174212406082

• Palavras-chave: Drainage; Coating; Permeability.

• Keywords: Drainage; Coating; Permeability.

• Abstract:

  The application of permeable coating is an effective strategy to reduce obstructions in the covering of drainage elements, such as manhole covers. Manhole covers, components of urban drainage systems, play a fundamental role in the proper management of rainwater, helping to reduce flooding events and facilitating the conduction of said water to receiving water bodies. During their useful life, these manhole covers may have their efficiency compromised due to obstruction due to the accumulation of solid waste eventually carried into the system.
  A permeable concrete plate was made, in accordance with ABNT NBR 16416:2015 with the addition of glass fibers, and cylindrical test specimens (10 cm x 20 cm) were made, with the same additions, and subsequently tested for compression in accordance with (ABNT NBR 5739:2018). A permeability test (ABNT NBR 16416:2015) was performed on the plate in order to measure its drainage capacity. The compressive strength results did not reach the value of 22.0 MPa predicted according to DNIT (2004) in any of the 3 scenarios tested. However, it is worth noting that scenarios 2 and 3 showed an increase in resistance when compared to the reference scenario. Scenario 1, even with the addition of fiberglass, did not show an increase in resistance in relation to the reference scenario. Regarding the drainage capacity of the plate, it was observed that it presented permeability levels of around 8.73% of the drainage capacity of a conventional manhole cover. It is concluded that the use of pervious concrete would require an increase in the area of the manhole cover so that the permeability is compatible with that provided by the conventional manhole cover.