Methodology of dosage and feasibility in study of the potential of application of concrete waste in total as a great aggregate for permeable concrete without additives
DOI:
https://doi.org/10.6008/CBPC2179-6858.2021.002.0032Keywords:
Recycled aggregate, Concrete, Waste management, SustainabilityAbstract
The use of permeable concrete as a pavement represents an excellent device to combat the phenomenon of urban surface waterproofing. This research involves the pioneering evaluation of the influence of the use of these recycled residues to replace 100% of the conventional aggregate of stone origin in the mechanical and hydraulic behavior of permeable concrete through tests recommended by ABNT NBR 16416: 2015, without the use of additives. To this end, a dosage study was carried out in order to determine the most suitable mix for making the draining composite while paving, hoping to obtain a material in compliance with the normative requirements of resistance and permeability, from technically viable procedures. All permeability coefficients obtained in the laboratory exceeded the normative limit of 0.1 cm/s, reaching values of up to 2.36 cm/s. Likewise, average values of characteristic resistance to compression of the tested pieces were obtained close to the limit of 20 MPa stipulated by the standard (23.98 MPa and 19.57 MPa, referring to the 60 mm and 80 mm pieces, respectively) and flexural tensile strength was also met: average of 2.08 MPa, higher than the recommended minimum (2 MPa). In view of the favorable perspective, the final products may be manufactured in series, directly and indirectly reducing the expenses associated with civil construction waste and waterproofing urban pavements.
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