INFLUÊNCIA DE ADITIVOS SUPLERPLASTIFICANTES, PROPORÇÕES GRANULOMÉTRICAS E TEMPERATURA DA ÁGUA EM PAVIMENTOS RÍGIDOS PERMEÁVEIS

Abstract

The use of permeable pavements in large urban centers is a strategy to overcome the obstacles of inefficient drainage, resulting from the growth of impermeable areas that emerged with the urbanization process. With the reduction of permeable lanes due to the implementation of roads and pavements, situations of flooding, inundation and aquaplaning have become frequent. The use of a permeable asphalt, the one that allows the percolation of rain between its voids, can be the solution to this setback. As it is a material of low resistance, in order to have a greater range of use of this material, it is necessary to promote more analyzes and studies regarding this technology. This work carried out tests with a focus on the variation of the use rate of the superplasticizer additive, the granulometric range, and the temperature of the mixing water of the concrete, in order to obtain a rigid permeable pavement that meets the minimum resistance parameters required in the Manual of DNIT Rigid Pavement, that is, one that reached a minimum of 4.4 MPa of tensile strength, and that reached 10-3 m/s permeability coefficient, as recommended by NBR16416/15 for permeable concrete pavements. The index of 0.1% of superplasticizer additive, 15% of fines, and water temperature at 40°C (Trace IX) raised the average range to 5.443088 MPa in the tensile strength by axial compression, being higher in 86, 32% in axial compression tensile strength of a concrete with the same fines index, without additive, water temperature at 25ºC, permeable (Trace XIV) and greater than 19.49% in axial compression tensile strength of a concrete waterproof, with the same fines content, 0.23% additive, water temperature at 25ºC, waterproof.