Permeable concrete plates with wastes from the paper industry: Reduction of surface flow and possible applications.

• The active silica and waste used have left the pervious concrete more sustainable. • All the mixtures had a high degree of permeability (>3600 mm/h). • Pervious concrete makes space above the pavement less hot because it radiates less. • There is a reduction of flooding in much paved urban areas, increasing groundwater. • The numerical simulation showed an adequate behavior for traffic of light vehicles. Sustainable pervious concretes were developed using waste from the paper industry so to lower cement use in public sidewalks and footways. Pervious concretes with 5 and 10% of industrial waste (WPI) in replace of Portland cement were produced. Flexural tensile strength and compressive strength measured were used to verify, through a numerical simulation, the flexural stress of a 0.7 × 0.8 × 0.1 m pervious concrete plate. Porosity, permeability coefficients of the plates, as well as their thermal conductivity were determined. As a result, compressive strength was reduced, flexural tensile strength was not influenced. Mixtures presented high degrees of permeability (over 3600 mm/h), and potentially reduce CO 2 emissions in cement production, for the proposed use. The pervious concrete with 5% of WPI showed the lowest thermal conductivity (0.798 W/mk), inferior to the thermal conductivity of conventional impervious concrete (1.518 W/mk). The blended pervious concrete can be used where low compressive strength is admitted. [ABSTRACT FROM AUTHOR]