RESEARCH ARTICLE


Sustainable Use of Recycled Glass Powder as Cement Replacement in Concrete



Nafisa Tamanna1, *, Rabin Tuladhar1
1 College of Science and Engineering, James Cook University Townsville, QLD 4811, Australia


© 2020 Tamanna and Tuladhar

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the College of Science & Engineering (CSE), James Cook University, Townsville QLD 4811, 1 Australia;
Tel: 0469832349; E-mail: nafisa.tamanna@my.jcu.edu.au


Abstract

Aims:

This paper introduces a sustainable way of using Recycled Glass Powder (RGP) as a cement replacement in concrete.

Background:

In Australia, almost one million tons of glass waste is collected annually for recycling purpose. However, the inconsistency in chemical composition and the presence of impurities make glass recycling process difficult. Besides, the lack of local recycling plants coupled with high transportation costs makes the recycling process expensive.

Objective:

For the successful use of recycled glass in concrete for industrial applications, it is therefore, important to characterize the physical and chemical properties of recycled glass collected by the local councils. Furthermore, the effects of replacement levels of cement with recycled glass on the strength and durability properties of concrete need to be assessed as well.

Methods:

Mechanical strength and durability properties of concrete with 10%, 20% and 30% of RGP as a partial cement replacement were tested and compared with typical concrete and fly ash blend concrete. The relative strength test of mortar was conducted to assess the reactivity of glass powder with the cement.

Results:

RGP concrete showed an improvement in strength over time like fly ash. Using RGP significantly improved the resistance against chloride penetration with increasing glass powder content. Furthermore, RGP also met the relative strength requirement as per Australian Standard requirement to be considered as a supplementary cementitious material.

Conclusion:

This research showed that the use of RGP as cement replacement is feasible for replacement level up to 10%. The outcome of this research aims to contribute towards sustainable development by reducing the consumption of cement, as well as reduction of glass waste going into landfill.

Keywords: Recycled glass powder, Sustainable concrete, Supplementary cementitious material, Pozzolanic reaction.