Cement mortars with use of polyethylene tereftalate aggregate: a review on its sustainability

Nathana Luiza Pinto De Lima,Renata Carla Tavares Dos Santos Felipe,Raimundo Nonato Barbosa Felipe

doi:10.33448/rsd-v9i8.5640

Nathana Luiza Pinto De Lima, Renata Carla Tavares Dos Santos Felipe + Show 1 more

Open Access

https://doi.org/10.33448/rsd-v9i8.5640

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Abstract

The high consumption of plastic products generates several impacts, mainly associated with its waste. Due to its characteristics, the possibilities of disposal of this waste are reduced, so that its use as by-products comprises the best solution for the management of this waste. In this context, research has emerged that uses the residue of plastic products, such as post-consumer polyethylene tereftalate (PET), as a substitute for the natural aggregate in cement products. The production of these materials intends to work in parallel two socio-environmental objectives: the reduction of consumption of natural aggregates and the reuse of plastic waste in construction materials. This work will present data related to research on the production of cementitious mortars with partial replacement of natural sand by light aggregate of PET waste (ALRP) aiming at the realization of the state of the art contributing to the methodological basis of future research on the subject. For that, systematic searches were carried out in the ScienceDirect, Web of Science and Scopus databases, using descriptors, logical operators and temporal constraint application. In addition to presenting the main research data, an approach will be made on the importance of the problems associated with the theme and the parameters to be met by this new ecological material based on the concepts of sustainable construction.

Highlights

In recent decades, large volumes of natural resources have been used in industry, commerce and construction; in addition, human activities cause high rates of waste generation (Santos et al, 2020), causing soil, water and air degradation.Sand is a natural aggregate formed from rock erosion over thousands of years
Sand extraction rates are exceeding the replenishment rate, being estimated that 40 to 50 billion tons of natural aggregates are extracted each year, with more than half of that volume consumed by the construction industry (United Nations Environment Program [UNEP], 2019)
United Nations Environment Program (UNEP) (2019) confirms the importance of the volume of natural resources used in the production of cementitious materials - such as concrete and mortar, about 65% of the total produced is composed of natural aggregates

Summary

Introduction

Large volumes of natural resources have been used in industry, commerce and construction; in addition, human activities cause high rates of waste generation (Santos et al, 2020), causing soil, water and air degradation.Sand is a natural aggregate formed from rock erosion over thousands of years. There are records of its use since the most remote times, as in the making of the blocks used in the Egyptian pyramids (Gavriletea, 2017). Today, it is the second most consumed natural resource on the planet, less only than consumption of water (Torres, Brandt & Liu, 2017). Sand extraction rates are exceeding the replenishment rate, being estimated that 40 to 50 billion tons of natural aggregates are extracted each year, with more than half of that volume consumed by the construction industry (United Nations Environment Program [UNEP], 2019). United Nations Environment Program (UNEP) (2019) confirms the importance of the volume of natural resources used in the production of cementitious materials - such as concrete and mortar, about 65% of the total produced is composed of natural aggregates

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