Published: Građevinar 77 (2025) 6
Paper type: Original scientific paper
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Sustainable concrete modified with industrial waste and natural fibre
Abstract
This study aims to develop a sustainable concrete with partial replacement of fine aggregate with 70% waste foundry sand (WFS) and 30 % manufactured sand (M-sand), along with 10 % replacement of cement with metakaolin and a constant 0.5% addition of banana fibre. Fresh properties such as the slump value and mechanical properties such as the compressive strength, split tensile strength, and flexural strength of the mixes were examined. The modified concrete mix, F70S30MB, exhibited comparable mechanical properties, achieving 55.6 % higher flexural strength than the control mix, while reducing the embodied energy and embodied carbon by 7.39 % and 7.16 %, respectively. It was concluded that modifying concrete with industrial waste and natural fibres enhances its mechanical properties and reduces the environmental impact, thereby promoting sustainable construction.
Keywordswaste foundry sand, M-sand, metakaolin, natural fibre, mechanical properties, sustainable concrete
