Production of pressed bricks with recycled aggregates from civil construction

Abstract

The construction sector causes major environmental impacts resulting from its activities, and the high generation of waste, called Civil Construction Waste (CCR), is associated with several critical and urgent problems in the urban context. This article, the result of the master's thesis in Environment and Development, carried out in the Graduate Program of the University Center Univates - RS, evidences the possibility of reusing this material (CCR) as an alternative to incorporate it in the manufacture of bricks, with the objective of performing the use of civil construction waste. To enable the production of pressed brick, recycled aggregates of civil construction (CCR) were used. Based on the information and data collected, the current legislations were studied prioritizing the theme, with emphasis on the legal instruments stipulated for the environmental management of CCR. The bricks pressed with CCR were used in the execution of fence masonry, aiming to provide an appropriate destination for the CCR, to contribute to sustainability in construction, thus mitigating the problems faced by environmental and social agencies. To characterize the materials, laboratory tests were carried out according to the following standards: granulometric analysis tests, simple compression tests of water absorption and capillarity.  The small soil was used where the percentage with mortar content (51%) was chosen, applying in the defined traits (1:7, 1:9, 1:11 and 1:20). Bricks were produced with CMR that were analyzed and tested in a first stage at the ages of 07, 14, 28 days, and the end of the studies occurred at the age of 180 days, according to the established standards of tests for water absorption by immersion, water absorption by capillarity, simple axial compressive strength, among others.