Soil-Cement Bricks Development Using Polymeric Waste.

Stefânia Lima Oliveira Metzker,Rafael Farinassi Mendes,André Geraldo Cornélio Ribeiro,Juliana Farinassi Mendes,Ticyane Pereira Freire Sabino

doi:10.1007/s11356-021-16769-z

Stefânia Lima Oliveira Metzker, Rafael Farinassi Mendes + Show 3 more

Open Access

https://doi.org/10.1007/s11356-021-16769-z

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Abstract

This research aimed to evaluate the effect of adding different polymeric waste percentages and types on the physical, mechanical, thermal, and durability properties of soil-cement bricks. Tire and polyethylene terephthalate (PET) waste were evaluated at 1.5 and 3.0% (mass/mass). The soil was characterized in terms of shrinkage, compaction, consistency limits, particle size, and chemical analyses, whereas the waste particles were submitted to morphological characterization. The bricks were produced in an automatic press with a 90:10 (mass/mass) soil:cement ratio. The soil-cement bricks were characterized by density, moisture, water absorption, loss of mass by immersion, compressive strength, thermal conductivity, and microstructural analysis. PET waste stood out for its use as reinforcement in soil-cement bricks. The best performance was obtained for bricks reinforced with 1.5% PET, which showed a significant compressive strength improvement, meeting the marketing standards criteria, even after the durability test, as well as obtaining the lowest thermal conductivity values. The percentage increase from 1.5 to 3.0% fostered a significant water absorption and loss of mass increase, as well as a significant compressive strength reduction of the bricks.

Highlights

Soil-using construction is one of the oldest and most widely used techniques around the world
The soil-cement bricks were characterized by density, moisture, water absorption, loss of mass by immersion, compressive strength, thermal conductivity and microstructural analysis
The best performance was obtained for bricks reinforced with 1.5% Polyethylene Terephthalate (PET), which showed a significant compressive strength improvement, meeting the marketing standards criteria, even after the durability test, as well as obtaining the lowest thermal conductivity values

Summary

Introduction

Soil-using construction is one of the oldest and most widely used techniques around the world. The need for environmental preservation and the tendency to natural resources shortage force construction industry to devise new concepts and technical solutions aiming at the sustainability of its activities, using a range of effective solutions, combined with known bioconstruction techniques, which may be incorporated to human housing reality (Lai et al 2019; Barbosa et al 2019). In this way, research development for the use of waste on the construction industry has been gaining relevance, aiming at lower energy demand and creating possibilities in housing advancements by reducing the use of non-renewable materials and construction materials cost. According to data from the Brazilian Micro and Small businesses support service - SEBRAE (2017), soilcement bricks provide a 20 to 40% saving compared to conventional bricks. Barbosa et al (2019), Saidi et al (2018), Reddy and Latha (2014) and Muntohar (2011) mentioned advantages such as similar compressive strength and improved thermal insulation for soil-cement bricks compared to conventional ones

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