Development of artificial stone base of oyster shells for application in workbenches.

Reference Presenter Authors
(Institution)
Abstract
13-004 Bruno Pacheco Henriques Silva, T.H.(Universidade Federal de Santa Catarina); Henriques, B.P.(Universidade Federal de Santa Catarina); Silva, F.S.(Universidade do Minho); Guimarães, J.M.(Universidade Federal de Santa Catarina); Fredel, M.C.(Universidade Federal de Santa Catarina); As the world demand for new sources of food has grown several sectors have been investing the industrialization of their productions, as a consequence these sectors have experienced an exponential growth of their production. However, in conjunction with this growth, a legacy of environmental damage is being generated. In mariculture, especially oysterculture, the waste generated that most concerns the scientific community it is oyster shells. In the year 2014, approximately 438 thousand tons of oyster shells were produced, a great majority being discarded in an inadequate way. It should be emphasized that these shells are composed of calcium carbonates, which facilitates their reintroduction into the industry. The development of an artificial stone, a polymer matrix composite with oyster shell load, is on-going with the intention of minimizing the environmental impact generated. In other words, this project is developing a sustainable alternative for oyster shells. The final goal is a material with wear resistance, with low porosity index and high flexural strength values. This should replace natural stones in workbenches, representing not only an innovation in the field of development of new materials but also a concern for the environment: should add commercial value to a waste, in addition, it will encourage the extraction reduction of natural stones. Oyster shells were collected in the producer community, benefited, characterized and implemented in the polymer matrix through a process of vacuum vibration, with different compositions, to ascertain the best set of properties; tests to evaluate the material are being performed. The characterization results obtained demonstrate the effectiveness of the beneficiation process, where all the organic matter was eliminated. Some tests as water absorption tests, 4-point bending, staining resistance, freeze resistance and defrost and hardness tests are in progress for homologation to the material.
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