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EFISIENSI PENGGUNAAN TULANGAN KOLOM LANTAI 1 DAN 2 KANTOR PADA PROYEK GUDANG POLYTRON TANJUNG MORAWA Metro Sahat Sianipar; Halen Viery Sidabutar; Juanda Alwi Dalimunthe; Aldi Elohi Boangmanalu; Dohar Sinabutar
Kohesi: Jurnal Sains dan Teknologi Vol. 3 No. 9 (2024): Kohesi: Jurnal Sains dan Teknologi
Publisher : CV SWA Anugerah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.3785/kohesi.v3i9.3971

Abstract

Pada proyek konstruksi terdapat sebuah masalah pada material sisa. Material merupakan salah satu komponen yang penting dalam menentukan besarnya biaya suatu proyek mempunyai kontribusi besar 40-60% dari biaya proyek, sehingga harus diperhatikan dalam memanajemen sisa material agar bisa dimanfaatkan kembali supaya tidak terbuang. Terdapat berbagai jenis material salah satu material yang biasa dijumpai adalah besi tulangan, Karena besi tulangan memiliki nilai yang cukup tinggi sehingga material ini harus diperhitungkan dengan sangat teliti agar mendapatkan nilai kebutuhan tulangan yang optimal dan dapat meminimalisir sisa potongan besi tulangan yang terbentuk sehingga dapat mencegah terjadinya kerugian. Untuk dapat mengurangi sisa material besi tulangan dapat dilakukan dengan membuat bar bending schedule pada program Microsoft Excel. Bar Bending Schedule dapat mengoptimalisasi kebutuhan besi tulangan sehingga dapat mengurangi sisa potongan yang dapat terbentuk. Tujuan dari penelitian ini adalah untuk menghitung efisiensi penggunaan tulangan kolom yang diperlukan berdasarkan shop drawing dan menghitung sisa tulangan kolom yang tidak digunakan pada Kantor Proyek Pembangunan Gudang Polytron Tanjung Morawa. Dari penelitian hasil didapatkan kebutuhan besi tulangan D10 sebanyak 3072,66 kg, D16 sebanyak 4866,552 kg. Serta sisa (waste) material besi tulangan yang dihasilkan dengan metode Bar Bending Schedule pekerjaan kolom pada Kantor Proyek Pembangunan Gudang Polytron Tanjung Morawa yaitu pada besi D10 sebesar 0,35% dan D16 sebesar 5,14%. Dengan total keseluruhan sisa (waste) besi tulangan yang terbentuk sebesar 2,21%.
UTILIZATION OF WASTE PETUNG BAMBOO PIECES AS PARTIAL SUBSTITUTION OF COARSE AGGREGATE TO IMPROVE COMPRESSIVE STRENGTH OF CONCRETE DOHAR SINABUTAR; YONAS PRIMA ARGA RUMBYARSO
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 4 No. 03 (2024): INTERNATIONAL JOURNAL OF MULTISCIENCE - EDITION SEPTEMBER - DECEMBER 2024
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

Utilizing waste as an alternative building material is becoming an effective solution to environmental problems and is popular in developing countries. On the other hand, the concrete industry, a key component of construction, continues to innovate to improve quality and efficiency. The increasing demand for concrete is driving the development of mix designs that meet stringent quality and compressive strength standards, while taking into account environmental sustainability. Advances in concrete technology spur research initiatives to improve its quality and efficiency of use, with innovations in material selection and execution methodologies. This is aimed at meeting the increasing needs and overcoming construction challenges. Modern concrete is required to perform optimally in less time, requiring effective additives for performance enhancement. Recent research has integrated bamboo waste from the handicraft industry as a component of concrete mixes, increasing the speed of project execution and providing a sustainable solution in waste management. The authors were interested in conducting an in-depth study on increasing the compressive strength of concrete by integrating waste bamboo pieces. The concrete under study has the following grades f´c 25 MPa (K-300) and tested at 7, 14, and 28 days to assess the effectiveness of bamboo as an additive. The test results are expected to provide significant data on the viability of bamboo waste as a partial substitution for coarse aggregate. The title of the study, “Use of Waste Bamboo Pieces as Partial Substitution for Coarse Aggregate to Increase the Compressive Strength of Concrete,” reflects the objectives of the study and the utilization of sustainable materials in modern construction. Based on the results of the research that has been carried out and the discussion in the previous chapter with the variation of waste bamboo pieces 0%, 10% and 15%, the conclusions can be drawn, namely as follows the results of compressive strength testing on normal concrete at the age of 28 days reach 452 kN (fʹc 26,1 MPa = 104%), while variation 1 of 10% waste bamboo cuttings experienced a decrease in compressive strength, reaching 305 kN (fʹc 17,60 MPa = 70%), and variation 2 15% waste bamboo cuttings decreased, reaching 309 kN (fʹc 17.83 MPa = 71%).
THE USE OF BLACK BAMBOO AS A SUBSTITUTE FOR COARSE AGGREGATE TO INCREASE CONCRETE COMPRESSIVE STRENGTH Dohar Sinabutar; Yonas Prima Arga Rumbyarso
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 02 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2025
Publisher : CV KULTURA DIGITAL MEDIA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The use of waste as an alternative building material is an effective solution to environmental problems and is popular in developing countries. On the other hand, the concrete industry, a key component of construction, continues to innovate to improve quality and efficiency. The increasing demand for concrete has driven the development of mix designs that meet strict quality and compressive strength standards, while also considering environmental sustainability. Advancements in concrete technology are driving research initiatives to improve the quality and efficiency of its use, with innovations in material selection and implementation methodologies. This aims to meet increasing demands and address construction challenges. Modern concrete is required to perform optimally in shorter timeframes, necessitating effective additives for performance enhancement. Recent research has integrated bamboo waste from the craft industry as a concrete mixture component, accelerating project implementation and providing a sustainable solution for waste management. The author is interested in conducting an in-depth study on increasing the compressive strength of concrete by integrating bamboo waste. The concrete studied has a quality of f´c 25 MPa (K-300) and was tested at 7, 14, and 28 days to assess the effectiveness of bamboo as an additive. The test results are expected to provide significant data on the viability of bamboo waste as a partial substitute for coarse aggregate. The study title, “The Use of Bamboo Waste as a Partial Substitute for Coarse Aggregate to Enhance Concrete Compressive Strength,” reflects the research objectives and the utilization of sustainable materials in modern construction. Based on the results of the research conducted and the discussion in the previous chapter with variations of black bamboo waste at 0%, 10%, and 15%, the following conclusions can be drawn: the compressive strength test results for normal concrete at 28 days reached 452 kN (fʹc 26.1 MPa = 104%), while variation 1 with 10% black bamboo waste showed a decrease in compressive strength, reaching 305 kN (fʹc 17.60 MPa = 70%), and variation 2 with 15% black bamboo waste also showed a decrease, reaching 309 kN (fʹc 17.83 MPa = 71%).