Avaliação de concreto auto-adensável com agregado reciclado de telha cerâmica

Abstract

The increasing demand for raw materials in construction, especially those drawn from nature, is of great concern due to harmful impacts it produces. The use of recycled aggregates can be a sustainable and contribute to the preservation of natural resources, contributing to the sustainable development of the construction industry. The residue from the ceramic tile has been studied for various applications, attracting great interest from researchers due to the need for innovation in materials and methods. Published works have identified the generation of waste from the manufacture of tiles, the ceramic industry in considerable amount thus justifying the need for its use. The self-compacting concrete - CAA is a material that has been used increasingly in construction, hence the interest in producing this type of recycled aggregate concrete with tile - ART. Previous studies have demonstrated the ability to produce recycled aggregate concrete tile (ART) with moderate resistance. This study aimed to evaluate properties in fresh and hardened state in a CAA produced with a fraction of thick ART and bystanders in thin 0.15 mm sieve opening of this same material, by the use of superplasticizer last generation as a way of adding value to this waste and contribute to the sustainability of the sector. The measurement was performed by a method developed for this type of aggregate based on existing methods. In the fresh state tests were performed density, air content embedded scattering, Box U test and test tube U. In the hardened condition assays were performed velocity of ultrasonic wave propagation, resistance to axial compression, static modulus of elasticity in compression, density, water absorption and void index. The results indicate that it is feasible to use in ART CAA for certain purposes.