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Jurnal Rekayasa Teknik Sipil dan Lingkungan
Published by Universitas Kristen Indonesia
ISSN : 27223442     EISSN : 27220230     DOI : DOI: https://doi.org/10.33541/cen
Core Subject : Science, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Environmental Science Materials Science & Nanotechnology Transportation
Jurnal CENTECH pertama kali diterbitkan pada bulan April 2020 melalui penerbit UKI Press dengan nama Jurnal Rekayasa Teknik Sipil dan Lingkungan CENTECH. Jurnal ini dikelola oleh Program Studi Teknik Sipil UKI yang dimaksudkan untuk mempublikasikan karya-karya penelitian dosen, alumni, dan praktisi serta peneliti di luar UKI. Jurnal ini memuat artikel-artikel penelitian yang berfokus pada bidang Manajemen Konstruksi, Geoteknik, Rekayasa Struktur, Rekayasa Transportasi, Manajemen Sumber Daya Air serta Rekayasa Lingkungan. Jurnal CENTECH diterbitkan secara berkala dua kali dalam setahun, yaitu April dan Oktober, dimana terbitan perdana adalah pada bulan April 2020. Untuk peningkatan kualitas jurnal maka Prodi Teknik Sipil UKI menerbitkan jurnal ini secara online sehingga dapat mengajukan akreditasi jurnal dalam waktu dekat.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 73 Documents
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UTILIZATION OF CORN COB ASH AGRICULTURAL WASTE TO IMPROVE THE PERFORMANCE OF SELF-COMPECTING CONCRETE (SCC) ON COMPRESSIVE STRENGTH AND FLOWABILITY IN MUARA TAMI DISTRICT, JAYAPURA CITY Harsan, Harsan Ingot Hasudungan
Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH Vol. 6 No. 2 (2025): Vol. 6 No. 2 (2025): Jurnal Rekayasa Teknik Sipil dan Lingkungan, OKTOBER 2025,
Publisher : UKI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/cen.v6i2.7404

Abstract

Utilization of agricultural waste corn cob ash as an admixture or partial cement substitute in self-compecting concrete (SCC) concrete mixtures. Burned corn cobs produce ash with silica content that has the potential as a pozzolan material. This waste is widely produced by farmers in Muara Tami District, Jayapura City, but has not been optimally utilized. This study aims to evaluate the effect of corn cob ash on two main aspects of SCC concrete, namely compressive strength and flowability. The methodology used includes making concrete mixtures with varying levels of corn cob ash of 0%, 5%, 10%, 15%, 20% as a partial cement substitute, followed by laboratory tests on the mechanical properties and workability of the concrete. Based on the test results, it can be concluded that the SCC concrete mixture with the addition of corn stalk ash (ABJ) up to 15% is still classified as normal SCC concrete based on the slump flow test, while the 20% ABJ mixture shows rather stiff properties and is less ideal for use as SCC concrete. The T500 flowability test shows that all mixtures, from 0% ABJ to 20% ABJ, have a spread time that is still within the normal range, namely between 2.5 and 4.9 seconds, thus meeting the flowability criteria for SCC concrete. In terms of compressive strength, the 5% ABJ mixture gives the best results, namely 36.6 MPa at 7 days and 48.9 MPa at 28 days, making it the most recommended mixture for use in SCC concrete structures. Conversely, the 20% ABJ mixture shows a significant decrease in compressive strength, making it less suitable for structural applications. Keywords: Self-compacting concrete (SCC); Corncob Ash; Slum Flow; Flowability; Compressive Strength
PENGEMBANGAN MATERIAL KONSTRUKSI RAMAH LINGKUNGAN MELALUI SUBSTITUSI PARSIAL SEMEN DAN PASIR DENGAN ABU SEKAM PADI DAN FLY ASH : PENGEMBANGAN MATERIAL KONSTRUKSI RAMAH LINGKUNGAN MELALUI SUBSTITUSI PARSIAL SEMEN DAN PASIR DENGAN ABU SEKAM PADI DAN FLY ASH Simanjuntak, Irene Vista; Tampubolon, Sudarno P
Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH Vol. 6 No. 2 (2025): Vol. 6 No. 2 (2025): Jurnal Rekayasa Teknik Sipil dan Lingkungan, OKTOBER 2025,
Publisher : UKI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/cen.v6i2.7538

Abstract

This study aims to develop an environmentally friendly construction material by partially substituting cement and sand with rice husk ash (RHA) and fly ash in pervious concrete. The combination of these two pozzolanic materials is expected to enhance the porosity of the concrete without causing a significant reduction in compressive strength, thereby maintaining its functionality while supporting rainwater conservation in urban areas. The experimental program consisted of a control concrete (without additives) and three modified mixes containing 10%, 15%, and 20% of combined pozzolanic materials (RHA and fly ash) as a partial replacement of the total binder, with a water–cement ratio (w/c) of 0.5 and up to 80% reduction in sand content. The results indicate that increasing the pozzolanic content proportionally increases the porosity and water absorption, from 5.9% in the control mix to 9.8% in the highest variation. Despite the higher porosity, the compressive strength remained within the range of 22–27 MPa, which satisfies the requirements for non-structural concrete. This demonstrates that RHA and fly ash can effectively replace a substantial portion of cement without significantly compromising performance. The pozzolanic reaction between active silica and Ca(OH)₂ generated secondary C–S–H gel formation, which strengthened the microstructure surrounding the pores. Overall, the incorporation of RHA and fly ash in pervious concrete produces a material with a balanced combination of strength, porosity, and environmental sustainability, offering great potential for application in sustainable drainage systems, permeable pavements, and urban green infrastructure. Keywords: Green Concrete; Rice Husk Ash; Fly Ash; Porosity; Compressive Strength; Pozzolanic Reaction; Sustainable Infrastructure.  
STUDI LITERATUR: PERBANDINGAN KINERJA CAMPURAN ASPAL RECLAIMED ASPHALT PAVEMENT DENGAN PENAMBAHAN OLI, MINYAK, DAN PLASTIK Zebua, Felix; Tafonao, Ismael; Tampubolon, Sudarno P; Tambunan, Efendy
Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH Vol. 6 No. 2 (2025): Vol. 6 No. 2 (2025): Jurnal Rekayasa Teknik Sipil dan Lingkungan, OKTOBER 2025,
Publisher : UKI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/cen.v6i2.8045

Abstract

This study is a literature review that compares the performance of recycled asphalt mixture or Reclaimed Asphalt Pavement (RAP) modified with three types of waste materials, namely waste oil, used cooking oil (WCO), and styrofoam plastic waste. An analysis was conducted on 13 scientific journals that discussed the influence of the three materials on technical parameters such as Marshall stability, flow, Marshall Quotient (MQ), and mixed durability. The results of the study show that used cooking oil (WCO) is the most optimal and environmentally friendly feedstock, as it is able to significantly increase the flexibility and durability of the RAP mixture at the ideal level of 3–6%. Used oil is also effective in restoring the aging properties of asphalt, but its use in excess amounts (>10%) can reduce its stability and resistance to water, and requires special handling because it is classified as B3 waste. Meanwhile, plastic waste such as styrofoam, PET, and LDPE are more suitable as additives to improve the structure and reduce the porosity of the mixture, although it does not function as the main contaminant. Of all the types of cooking materials used, used cooking oil (WCO) shows the most consistent performance according to Bina Marga 2010 specifications. Keywords: RAP, used oil, used cooking oil (WCO), styrofoam plastic waste

Page 8 of 8 | Total Record : 73

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