Investigating the impact of GGBS and fly ash on PET concrete RC beams
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Author |
S. T. P. V. T. A. Ajay, Durga Chaitanya Kumar Jagarapu, Chiranjeevi Rahul Rollakanti and B. Rama Krishna
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e-ISSN |
1819-6608 |
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On Pages
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1436-1446
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Volume No. |
19
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Issue No. |
24
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Issue Date |
January 25, 2025
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DOI |
https://doi.org/10.59018/122477
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Keywords |
PET concrete, workability, plastic waste, flexural behaviour, fly ash, GGBS.
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Abstract
Using recycled plastic as fiber aggregate in concrete has garnered attention due to its potential to enhance ductility properties, bolster durability, and mitigate cracking. By integrating recycled plastic fibers into concrete, sustainability is promoted by reducing new plastic production and extracting virgin aggregate. This research endeavors to explore the integration of finely graded Polyethylene terephthalate (PET) at a specific volume ratio of 1% in concrete. It is common practice to substitute cement with fly ash and ground granulated blast furnace slag (GGBS) to decrease the overall cement content. The primary aim is to augment mechanical properties and flexural behavior by partially substituting cement with GGBS and Fly Ash in PET concrete, thereby improving pore-filling effects. The investigation encompasses varying replacement percentages of GGBS (10%, 20%, 30%, 40%, 50%) and Fly Ash (10%, 20%, 30%, 40%, 50%) in PET concrete of M30 grade, determining the optimal replacement percentage to be 30% for both materials. Mechanical properties and flexural behavior of beams with two different cross-sections (1500 mm x 150 mm x 150 mm) and (1500 mm x 230 mm x 230 mm) are meticulously scrutinized using 30% replaced GGBS and Fly Ash in PET concrete. Test outcomes reveal that GGBS in PET concrete yields superior strength compared to Fly Ash, with the replacement of 30% GGBS demonstrating enhanced strength and durability in reinforced concrete beams.
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