Analysis of The Compressive Strength of Precast Concrete U-Ditches Using Recycled PET Bottles As Fine Aggregate
Analisis Kuat Tekan U-Ditch Beton Pracetak Dengan Subtitusi Limbah Botol PET Sebagai Agregat Halus
DOI:
https://doi.org/10.21070/ups.12466Keywords:
Precast U-Ditch, Concrete, PET Bottle Waste, Fine Aggregate, Compressive StrengAbstract
This study examined the use of polyethylene terephthalate (PET) waste as a partial replacement for fine aggregate in precast U-ditch concrete. A total of 36 cylindrical specimens (10 cm × 20 cm) were tested at 7, 14, and 28 days of age with PET content varying at 0%, 2%, 4%, and 6% of the fine aggregate mass. At 28 days, the 2% PET mixture yielded the highest compressive strength of 21.01 MPa, a 1.74% increase compared to the control concrete (20.65 MPa). The 4% and 6% PET mixtures yielded compressive strengths of 18.97 MPa and 18.98 MPa, respectively. The results of this study indicate that PET substitution affects the compressive strength of concrete in a nonlinear manner. The physical characteristics of PET, particle distribution, compaction methods, and the interaction between PET particles and the cement paste must be considered for practical application in precast concrete.
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