Abstract
Abstract The reduction of natural resources combined with a substantial increase in the generation of solid waste in large urban centers, justifies the search for methods of reusing the construction industry waste. The ceramic industry has a high disposal rate during the manufacturing, transportation and eventual replacement of its products. In this case, research on the reuse of ceramic materials is urgent. A possible solution is the employment of ceramic waste as a coarse aggregate in structural concrete. Therefore, the mechanical properties of this new mix of concrete have to be assessed. This study evaluates the bond strength between steel rebar and concrete with ceramic waste aggregates, by means of the pull-out test method, proposed by RILEM-FIP-CEB (1978). Three concrete mixtures were produced: a mixture without any replacement, and two other mixtures with gradual substitution of natural coarse aggregate by ceramic coarse aggregate (40% and 100% substitution, in volume). Nine cylindrical specimens, three for each of the concrete mixtures, were evaluated in laboratorial conditions. Results concerning bond stress between concrete and steel rebar indicated the feasibility of employing ceramic waste to replace part of the coarse aggregate in structural concrete.
Highlights
The continuing expansion of the construction industry can result in numerous environmental issues, especially the generation of large quantities of waste, often discarded inappropriately, compromising ecological protected areas and water sources
This study evaluates the bond properties of concrete mixtures produced with ceramic waste aggregates and steel bars
Several studies evaluated the bond between steel rebar and concrete mixtures made with aggregates from construction and demolition waste
Summary
The continuing expansion of the construction industry can result in numerous environmental issues, especially the generation of large quantities of waste, often discarded inappropriately, compromising ecological protected areas and water sources. It is noteworthy that much of this waste can be reused, reducing ecological impacts. According to Campos and Paulon (2015), the ceramic industry – which encompasses products, such as ceramic bricks, coatings and porcelain electrical insulators – has a high disposal rate during the manufacturing, transportation and eventual replacement of merchandise. Research on the reuse of ceramic materials is urgent. A possible solution is the employment of ceramic waste as a coarse aggregate in structural concrete. Structural elements manufactured with alternative concrete mixtures must meet project parameters that aim, above all, at the safety of buildings. This study evaluates the bond properties of concrete mixtures produced with ceramic waste aggregates and steel bars
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