Production of green concrete using recycled waste aggregate and byproducts

Author(s):

Khalid Al-Gahtani, (Civil Engineering Department, King Saud University, Riydah, Saudi Arabia)

Ibrahim Alsulaihi, (King Saud University, Riyadh, Saudi Arabia)

Mohamed Ali, (Structural Engineering Department, Cairo University, Giza, Egypt)

Mohamed Marzouk, (Structural Engineering Department, Cairo University, Giza, Egypt)

Citation:

Khalid Al-Gahtani, Ibrahim Alsulaihi, Mohamed Ali, Mohamed Marzouk, (2017) "Production of green concrete using recycled waste aggregate and byproducts", Built Environment Project and Asset Management, Vol. 7 Issue: 4, pp.413-425, https://doi.org/10.1108/BEPAM-09-2016-0047

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Single Sentence Summary:

The sustainability benefits of using demolition and industrial wastes as a replacement for aggregates and cement indicate an enhancement in the mechanical characteristics of green concrete when cement is replaced with pozzolanic industrial wastes and byproducts.

Abstract:

Purpose

The purpose of this paper is to highlight the sustainability benefits of using demolition and industrial wastes as a replacement for aggregates and cement in traditional concrete mixes.

Design/methodology/approach

Crushed concrete from demolition sites served as a replacement for fine and coarse aggregate in some of the mixes at various ratios. In addition, ground granulated blast furnace slag, metakaolin, silica fume, and fly ash each served as a cement replacement for cement content in the mixes tested in this research at various rates. Compression strength tests, permeability, and thermal expansion tests were performed on various mixes to compare their performance to that of traditional mixes with natural aggregate, and with no cement replacement.

Findings

The compressive strength results indicated the suitability of using such demolition wastes as replacements in producing green concrete (GC) without hindering its mechanical characteristics significantly. In addition, the results indicated an enhancement in the mechanical characteristics of GC when replacing cement with pozzolanic industrial wastes and byproducts.

Originality/value

The research assesses the utilization of sustainable GC using recycled waste aggregate and byproducts.

Keywords:

Sustainability, Building materials, Compressive strength, Cement replacement, Green concrete, Recycled aggregate

Type:

Research paper

Publisher:

Emerald Publishing Limited

Received:

15 October 2016

Revised:

28 January 2017, 23 May 2017, 06 June 2017, 10 June 2017

Accepted:

21 June 2017

Acknowledgments:

This project was funded by the National Plan for Science, Technology and Innovation (MAARIFAH), King Abdulaziz City for Science and Technology, Kingdom of Saudi Arabia, Award Number 11-BUI2090-02.

Copyright:

© Emerald Publishing Limited 2017
Published by Emerald Publishing Limited
Licensed re-use rights only