Experimental Study of Self-Compacting Mortar Incorporating Recycled Glass Aggregate

Awetehagn Tuaum,Walter Oyawa,Stanley Shitote

doi:10.3390/buildings8020015

Awetehagn Tuaum, Walter Oyawa + Show 1 more

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https://doi.org/10.3390/buildings8020015

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Journal: Buildings	Publication Date: Jan 26, 2018
Citations: 39	License type: CC BY 4.0

Affiliation: Mekelle University, Rongo University

Abstract

This experimental research is focused on the development of self-compacting mortar incorporating recycled glass aggregate (SCM-RGA) as partial substitution of fine aggregate (wt 0%, 10%, 20%, 30%, 40% and 50%). The fresh and hardened mechanical properties as well as durability of SCM-RGA mixes were investigated. Limestone powder (LP) was used as filler that constitutes 20% of the powder volume to reduce the amount of cement. The SCM-RGA mixtures were designed based on Japanese mix design method. The experimental test results showed that the slump flow of SCM-RGA mixes decreased and V-funnel flow time increased when the content of recycled glass aggregate (RGA) increased. The bulk density, compressive strength, flexural strength, water absorption and sorptivity of SCM-RGA mixes were decreased as RGA content increased. Moreover, the accelerated mortar bar test results showed that the expansion due to alkali–silica reaction (ASR) of SCM-RGA mixes increased as the content of RGA increased although the expansion of all mixes were within acceptable limit and potentially innocuous. In conclusion, up to 30% of RGA can be successfully integrated in SCM mixes that offers comparable strength performance, sorptivity enhancement and without long term detrimental ASR effect, and thus, contributes towards sustainable solid waste management, conservation of natural resources and environmental protection.

Highlights

Sustainable waste management especially for non-degradable solid wastes such as glass is one of the major challenges that faces developing countries
Mixes increased as the content of recycled glass aggregate (RGA) increased the expansion of all mixes were within acceptable limit and potentially innocuous
Up to 30% of RGA can be successfully integrated in Self-compacting mortar (SCM) mixes that offers comparable strength performance, sorptivity enhancement and without long term detrimental alkali–silica reaction (ASR) effect, and contributes towards sustainable solid waste management, conservation of natural resources and environmental protection

Summary

Introduction

Sustainable waste management especially for non-degradable solid wastes such as glass is one of the major challenges that faces developing countries. Due to rapid population growth, urbanization and paramount economic growth, the rate of waste generation in aforementioned countries is increasing rapidly and poses serious health and environmental problems. There are mitigation measures commonly employed in solid waste disposal; recycling, landfilling and incinerating. Recycling of solid wastes for new material manufacturing in developing countries is not viable solution because it is capital intensive. Landfilling and incinerating are not eco-friendly solutions. There is a need for reliable and cost-effective method to curb this menace. Recycling of solid wastes in concrete production is a prevailing and feasible option towards sustainable solid waste management and infrastructure development [1]

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