Environmental evaluation of geopolymer bricks

Nicolas Youssef,Zoubeir Lafhaj,Andry Zaid Rabenantoandro,Fadi Hage Chehade,Zakaria Dakhli,F Hage Chehade

doi:10.1051/matecconf/201928103005

Nicolas Youssef, Zoubeir Lafhaj + Show 4 more

Open Access

https://doi.org/10.1051/matecconf/201928103005

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Abstract

This article presents the environmental assessment of geopolymer bricks produced from clay and waste bricks. The life cycle approach is the method used in this research to qualify, identify and compare the environmental impacts of geopolymer bricks and fired bricks. The results reveal that the manufacturing process of geopolymer bricks implies for the same compressive strength of fired bricks, a reduction of CO2 emissions by up to 55% for clay-based geopolymer bricks. This research checks the environmental interests of the application of geopolymerization technology in the production of bricks.

Highlights

Bricks are one of the widely used masonry units in the construction sector [1], with 1391 billions units fabricated per year [2]
The results reveal that the manufacturing process of geopolymer bricks implies for the same compressive strength of fired bricks, a reduction of CO2 emissions by up to 55% for clay-based geopolymer bricks
The aim of this study is to determine the environmental impact of geopolymer brick production

Summary

Introduction

Bricks are one of the widely used masonry units in the construction sector [1], with 1391 billions units fabricated per year [2]. The global building materials industry, such as those of bricks and cement, is responsible for a number of issues linked directly to a prominent social impact [3]. The production of one tons of cement requires the consumption of 1.7 tons of raw materials [3] and involves the emission of 0.8 tons of CO2 into the atmosphere [5]. In the production of building materials, a significant percentage of waste such as fly ash, waste bricks, blast furnace slag [6], results in many environmental issues. The process of recycling and recovering a large amount of waste bricks has become necessary to ensure environmental protection [7]. Geopolymerization is one promoted technique for recycling waste in the production of new building materials that meet both standards and application workability [8]

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