Effect of glazed roof tile waste weight fraction on the mechanical properties of eco-friendly concrete

Abd Wahab, Nur Umairah Hafifah (2022) Effect of glazed roof tile waste weight fraction on the mechanical properties of eco-friendly concrete. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Concrete suppliers are prioritising the production of sustainable and ecologically friendly concrete products because concrete is the most widely used building material in the world. By preventing waste and pollutants from contaminating our air, land, and water, these practical solutions are better for the environment, human and for the future. In this study, the replacement of fine aggregates in a cement mixture with glazed recycled roof tile waste (GRTW) is investigated. The creation of green concrete is being done in a novel way. The objectives of this project are to characterize the physical properties of recycle roof tile waste for replacing fine aggregates in green concrete, to analyze the physical and mechanical properties of green concrete produced using recycled roof tile waste as fine aggregate and to characterize the microstructure of green concrete produce using roof tiles waste. 12 concrete samples measuring 100 mm x 100 mm x 100 mm each were evaluated. 9 concrete specimens contained GRTW as fine aggregate in different weight fraction (10%, 20% and 50%), whereas 3 concrete specimens were preserved as control specimens. All specimens were ultimately examined for workability utilising compression testing, which includes the slump test, density test, water absorption test, and compressive strength test. According to the test results, when compared to the reference, or British Standard, the strength steadily declined with a 10% GRTW replacement and increased at 20% and 50% GRTW replacement. Mineral compositions such as portlandite (P), ettringite (E), calcium silicate hydrate (C-S-H), and calcium aluminosilicate hydrate (C-A-S-H) can be found in concrete mixtures. The hydration process in a 20% GRTW mix is the same as in a regular concrete mix, but the amount of C-S-H gel that forms in the mix is less than in a regular concrete mix. In order to substitute sand as the fine aggregate in concrete, a substitution of 20% GRTW had been shown to have better mechanical performance than the control specimen in terms of the slump test, water absorption test, and compression test.

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