SUBSTITUSI SEMEN DENGAN GROUND GRANULATED BLAST FURNACE SLAG TERHADAP KUAT TEKAN DAN EMISI KARBON BETON

Giffari Athallah Budiar, - and Ben Novarro Batubara, - and Istiqomah, - (2025) SUBSTITUSI SEMEN DENGAN GROUND GRANULATED BLAST FURNACE SLAG TERHADAP KUAT TEKAN DAN EMISI KARBON BETON. S1 thesis, Universitas Pendidikan Indonesia.

Abstract

Ground Granulated Blast Furnace Slag (GGBFS) merupakan produk sampingan dari pembuatan bijih besi yang dapat dimanfaatkan Kembali. Salah satu pemanfaatan GGBFS dapat menjadi binder yang lebih ramah lingkungan untuk beton dengan menggantikan semen Portland (OPC). Produksi OPC merupakan salah satu penyumbang karbon emisi duni terbesar mencapai 8%. Pada kajian ini, GGBFS digunakan sebagai material pengganti semen karena memilki kandungan CaO dengan jumlah besar. Tujuan penelitian ini adalah. mengetahui kadar optimum persentase substitusi GGBFS terhadap semen ditinjau dari kuat tekan, konsumsi energi, dan emisi karbon yang dihasilkan. Persentase substitusi yang digunakan adalah 20%, 40%, 50%, 60%, 80% terhadap volume absolut semen. Uji kuat tekan dilakukan pada beton dengan umur 7, 14, 28, dan 56 hari. Berdasarkan pengujian yang dilakukan, Nilai kuat tekan beton pada umur 56 hari mengalami kenaikan pada persentase 20% sebesar 4.85% (34.49 MPa), setelah itu mengalami penurunan pada 40%, 50%, 60% dan 80% secara berurutan sebesar 11.84% (30.80 MPa), 6.87% (28.68 MPa), 0.74% (28.47 MPa), 25.44% (21.23 MPa). Kemudian setelah dilakukan analisis, penurunan emisi yang dihasilkan beton selaras dengan semakin besar persentase substitusi GGBFS terhadap semen. Penurunan jumlah emisi karbon yang dihasilkan oleh substitusi GGBFS 20%, 40%, 50%, 60%, 80% terhadap Beton normal secara berurutan sebesar 17.34%, 34.68%, 43.36%, 52.03%, dan 69.37%. Persentase substitusi yang paling optimal dengan mempertimbangkan kuat tekan beton, jumlah energi serta nilai karbon emisi yang dihasilkan ialah 40%, dengan kuat tekan rata – rata pada hari ke – 56 sebesar 30.803 MPa, serta nilai energi dan emisinya sebesar 1869.64 GJ/m³ dan 308,64 t-CO2/m³, Kata kunci: Ground Granulated Blast Furnace Slag (GGBFS), Less cement concrete, Beton low carbon Ground Granulated Blast Furnace Slag (GGBFS) is a byproduct of iron ore processing that can be reused. One of its applications is as a more environmentally friendly binder in concrete by partially replacing Ordinary Portland Cement (OPC). The production of OPC is one of the largest contributors to global carbon emissions, accounting for up to 8%. In this study, GGBFS is used as a cement substitute due to its high CaO content. The objective of this research is to determine the optimal substitution percentage of GGBFS for cement in terms of compressive strength, energy consumption, and carbon emissions. The substitution percentages used were 20%, 40%, 50%, 60%, and 80% by absolute volume of cement. Tests were conducted on concrete at the ages of 7, 14, 28, and 56 days. Based on the results, the compressive strength at 56 days increased by 4.85% (34.49 MPa) at 20% substitution, but then decreased at 40%, 50%, 60%, and 80% by 11.84% (30.80 MPa), 6.87% (28.68 MPa), 0.74% (28.47 MPa), and 25.44% (21.23 MPa), respectively. Further analysis showed that carbon emissions decreased proportionally with the increasing percentage of GGBFS substitution. The reductions in carbon emissions for 20%, 40%, 50%, 60%, and 80% GGBFS substitution compared to normal concrete were 17.34%, 34.68%, 43.36%, 52.03%, and 69.37%, respectively. The most optimal substitution percentage, considering compressive strength, energy use, and carbon emissions, was found to be 40%, with an average 56-day compressive strength of 30.803 MPa, energy consumption of 1869.64 GJ/m³, and carbon emissions of 308.64 t-CO₂/m³. Keywords : Ground Granulated Blast Furnace Slag (GGBFS), Less Cement Concrete, Low-Carbon Concrete

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Item Type:	Thesis (S1)
Additional Information:	https://scholar.google.com/citations?hl=en&user=KY7xhiwAAAAJ&view_op=list_works&gmla=AH8HC4wT0HqkKnfjUJFqJJ1GRxc6WbGw36Ss-Pju0xDd3M3pApqOat2lJVeEjn_2_Fe9mTP273hiVTQV7SrQOE4b ID SINTA Dosen Pembimbing: Ben Novarro Batubara : 0019118004 Istiqomah : 0015127108
Uncontrolled Keywords:	Teknologi Beton ramah lingkungan: Substitusi Semen dengan GGBFS untuk Binder Beton Environmentally Friendly Concrete Technology: Cement Substitution with GGBFS for Concrete Binder
Subjects:	L Education > L Education (General) T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Fakultas Pendidikan Teknik dan Industri > Jurusan Pendidikan Teknik Sipil > Program Studi Teknik Sipil
Depositing User:	Giffari Athallah Budiar
Date Deposited:	27 Oct 2025 01:23
Last Modified:	27 Oct 2025 01:23
URI:	http://repository.upi.edu/id/eprint/143217

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