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Abstract
<abstract> <p>The expansion of cities contributed to the problems related to the accumulation of waste and lack of control over its management, there are still around 2400 dumps or uncontrolled landfills in Brazil. There is a large volume of polyethylene terephthalate (PET) improperly discarded. In turn, the construction industry has been looking for sustainable ways to produce concrete. This work deals with the analysis of the replacement of PET as a fine aggregate in concrete in the proportions of 5% and 15%. PET particles pass more than 75% in the 2.36 mm opening sieve and have more than 99% of their particle size retained in the 0.15 mm opening sieve. Concrete properties, compressive strength, tensile strength, water absorption and void ratio were evaluated and compared with the reference mix. In total, 45 specimens cast in concrete were used to complete the experiment. The results obtained showed that mixture compositions that incorporate PET as fine aggregates decrease compressive and tensile strength, increase water absorption and void index. The results obtained showed that blending compositions that incorporate PET as fine aggregates decrease compressive strength in about 14%, decrease tensile strength in about 7–11%, increased the void ratio in almost 20% and increased the water absorption in about 30%.</p> </abstract>
Highlights
The maintenance of natural resources for the preservation of the lives of future generations is a concern from the point of view of sustainable development which, added to the concern of environmentalists, bases business and economic growth strictly related to sustainable development [1].The final disposal of solid waste is one of the aggravating factors of environmental degradation.The selective collection and recycling of these wastes are considered an alternative for reducing the volume to be disposed of in landfills or dumps
This work intends to demonstrate that polyethylene terephthalate (PET) can be used in the partial replacement of fine aggregates in concrete with the triple advantage of (i) encouraging the citizen to make the selection of waste, (ii) preventing the material from going to landfill and (iii) reduce the exploitation of natural materials
The relationship of the fine PET aggregate with water can cause significant changes in the results of this test, as the lack of interaction between these two components can generate a composition with many voids and low workability
Summary
The maintenance of natural resources for the preservation of the lives of future generations is a concern from the point of view of sustainable development which, added to the concern of environmentalists, bases business and economic growth strictly related to sustainable development [1]. Disposal in landfill with loss total material; (ii) encourage ordinary citizens to selectively recycle PET, showing them that the effort to separate waste has positive consequences for the environment. In this sense, this work intends to demonstrate that PET can be used in the partial replacement of fine aggregates in concrete with the triple advantage of (i) encouraging the citizen to make the selection of waste, (ii) preventing the material from going to landfill and (iii) reduce the exploitation of natural materials. The use of additives becomes an alternative to increase the aggregate fixation capacity and improve the other concrete characteristics [11] In this context, the objective of this work was to develop concrete mixes with partial replacements of PET in the sand (fine aggregate), in the proportions of 5% and 15%.
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