Analysis of the efficiency of recycled concrete in civil construction

Sustainability has become a partner in matters involving civil engineering considering that the generation of construction waste produces similar amounts in Brazil to the industrial sector, where, moreover, most cannot be ruled out in any way, because they are harmful to the environment, some of which are irreparable. The emergence of techniques and ways to build sustainably has created ideas and new destinations for construction waste. Recycled concrete is one of the solutions adopted to reduce costs with new materials and appropriate treatment to waste generated by the civil council. The objective of this work was to make a comparison between tensile strength and compression of recycled concrete, analyzes the structural viability, using the same proportions of materials as a conventional concrete. The tests were carried out based on specimens of cylindrical shapes of 150 mm in diameter and 300 mm in height, following the imposed ratio of the height/diameter ratio required by the standard in force in the country. The result to traction was considered low, both for recycled and conventional concrete. However, concrete using 100% recycled material presented a higher “fck” than conventional. The two proportions used of recycled materials in two of the three concretes under study, showed whether the quantity of this is adequate and does not interfere with the result of the characteristic compressive strength of the concrete.