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All Journal Industrial Research Workshop and National Seminar Tedc
Febriansya, Aditia
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ANALISIS BIAYA MATERIAL PEKERJAAN DINDING MENGGUNAKAN BETON PRECAST DAN BATA RINGAN PADA PROYEK GEDUNG PT. MATTEL INDONESIA CIKARANG BEKASI Raafidiani, Reni; Garata, Garwin; Febriansya, Aditia
Jurnal TEDC Vol 18 No 2 (2024): JURNAL TEDC
Publisher : UPPM Politeknik TEDC Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70428/tedc.v18i2.843

Abstract

PT. Mattel Indonesia in Cikarang Bekasi during structural work so the contractor must determine the strategy that must be used to speed up the completion of the project. Replacing the materials used in wall work is one alternative that can be done by the contractor. Where the yield value is there are two material choices, namely precast concrete with a yield of 246,131.11 m2 and a lightweight brick yield of 232,101.6 m2. Thechoice of the two materials is determined by considering a study of the material costs required to install each material. The analysis carried out begins by studying the literature on the management of each material and knowing the conditions in the field. The design budget (RAB) required for precast concrete walls and lightweight brick walls is comparable. The duration required for the work of making precast concrete walls and lightweight brick walls is comparable. In terms of material cost comparison, precast concrete walls have the most effective SOP to apply in this project. Of all the variables compared, the material that is suitable to replace wall material in this project is precast concrete walls.
PEMANFAATAN LIMBAH GROUND GRANULATED BLAST FURNACE SLAG (GGBFS) DAN FLY ASH SEBAGAI PENGGANTI SEBAGIAN SEMEN PADA KUAT TEKAN BETON Raafidiani, Reni; Putri, Asti Aprillia Rekta; Febriansya, Aditia
Jurnal TEDC Vol 19 No 1 (2025): JURNAL TEDC
Publisher : UPPM Politeknik TEDC Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70428/tedc.v19i1.1214

Abstract

Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash are two industrial by-products with great potential as partial cement substitutes in concrete mixtures. GGBFS is a by-product of the iron smelting process in the steel industry. Once cooled and ground into a fine powder, it exhibits pozzolanic and cementitious properties. Meanwhile, Fly Ash, the residual ash from coal combustion in power plants, also possesses pozzolanic characteristics. The use of GGBFS and Fly Ash not only reduces the reliance on Portland cement but also provides various technical benefits, such as improving the durability of concrete, reducing heat of hydration, and enhancing long-term strength. Additionally, utilizing these materials aligns with the principles of sustainable development by reducing industrial waste and lowering carbon emissions. This study employs Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash as partial substitutes for cement in the production of geopolymer concrete. The proportion of GGBFS used is 50% of the total cement weight, while Fly Ash is applied in proportions of 5%, 10%, and 15% of the total cement weight. The concrete was designed with a target compressive strength of 26 MPa. Tests were conducted on 24 cylindrical concrete samples measuring 15 x 30 cm. The results revealed that the average compressive strength of concrete at 28 days was 34.15 MPa for normal concrete. For mixtures with a PCC:GGBFS:Fly Ash ratio of 45:50:5, the average compressive strength was 23.46 MPa; for a 40:50:10 ratio, the average strength was 18.48 MPa; and for a 35:50:15 ratio, the average strength was 19.54 MPa. Based on the analysis, the mix with 50% GGBFS and 5% Fly Ash was determined to be the optimal combination, as it achieved the highest compressive strength among all variations, at 23.46 MPa. This demonstrates that this combination can be utilized as a partial cement replacement for concrete production, considering specific requirements and its potential applications.
Co-Authors Andri Krisnandi Somantri, Andri Krisnandi Faizah, Salma Noor Garata, Garwin Heri Kasyanto, Heri Irbadhsyah, Moh. Zidane Ardian Muchtar Putri, Asti Aprillia Rekta Raafidiani, Reni