Desempenho técnico de blocos de concreto para pavimento intertravado com resíduo de construção e demolição

Abstract

The environmental issue is a topic much discussed and researched today. Natural resources are not unlimited and that the environment has the capacity to absorb the current amount of waste without an environmental imbalance. In this context one the construction industry, which has significant environmental impacts at all stages of its production process, being one of the generation of construction and demolition waste (CDW) in urban centers, resulting in detrimental effects of the environment where these are arranged and, by virtue of their waste materials increases the extraction of minerals. The interlocking concrete block is a way to use of construction and demolition waste, which besides presenting several technical advantages inherent to the type of flooring, also happens to be a product for the environment. Therefore, the present research has as main objective the preparation and evaluation of interlocking blocks of concrete with natural aggregate replacement by artificial aggregate (RCD red) from the municipality of Alegrete / RS in the percentages of 0%, 25%, 75% and 100%. For the material characterization tests were performed grain size, specific gravity and bulk density. For the production of the blocks was used trait of 1: 1.74: 2.15 (cement, sand and gravel) and a w / c ratio of 0.51 home. After production of pavers, they have been tested in the fresh state by analyzing consistency index and bulk density, gravimetric yield and the hardened state were analyzed compressive strength and water absorption. The results showed that the level of 25% was shown as best trait with substitutions not even reaching 35 MPa at 28 days as determined by NBR 9780 (1987), it can be used in places that require low traffic requests.