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Mara, Junus
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Penggunaan Limbah Bata Ringan Sebagai Bahan Campuran Pembuatan Beton Normal Hendrayana; Mara, Junus; Buarlele, Luciana
Paulus Civil Engineering Journal Vol. 6 No. 1 (2024): PCEJ Vol.6, No.1, March 2024
Publisher : Universitas Kristen Indonesia Paulus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/zaqbzf35

Abstract

Beton merupakan campuran bahan khususnya agregat, semen, pasir, air dan bahan tambahan limbah bata ringan. Limbah bata ringan yang digunakan berasal dari pembangunan Apartemen 31 Sudirman Suites, Kota Makassar. Metode yang digunakan dalam Mix Design adalah metode Mix Design SNI 03-2834-2000. Kuat tekan beton yang diharapkan pada umur 28 hari adalah 25 MPa. Uji kuat tekan beton dilakukan pada saat benda uji berumur 7, 21 dan 28 hari dengan menggunakan mesin uji tekan untuk mengetahui kuat maksimum beton ketika diberi beban tekan (P) dalam satuan kN. Nilai kuat tekan beton umur 28 hari dengan perubahan 0%, 3%, 4% dan 5% berturut-turut adalah 26,492 MPa, 24,889 MPa, 23,569 MPa dan 22,438 MPa. Berdasarkan hasil pengujian diperoleh nilai rata-rata kuat tarik belah. Beton (ft) pada perubahan 0%, 3%, 4% dan 5% adalah 2640 MPa, 2428 MPa, 2098 MPa dan 1933 MPa. Dari hasil percobaan menunjukkan rata-rata nilai kuat lentur beton pada variabel 0%, 3%, 4% dan 5 berturut-turut adalah 3022 MPa, 2760 MPa, 2586 MPa dan 2470 MPa. 
Analisis Waktu Dan Biaya Penggunaan Alat Berat Pada Pekerjaan Permukaan (AC – BC) Pada Proyek Rekontruksi Jalan Kabupaten Ruas Lili Kira – Buangin Leonardo Massolo; Mara, Junus; Pascal Tiyouw, Herby Calvin
Paulus Civil Engineering Journal Vol. 6 No. 4 (2024): PCEJ Vol.6, No.4, Desember 2024
Publisher : Universitas Kristen Indonesia Paulus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/z87s8g17

Abstract

Untuk setiap jenis pekerjaan, memilih alat berat yang tepat sangat penting untuk memaksimalkan kinerjanya. Penelitian ini bertujuan untuk membandingkan hasil perhitungan alat berat metode pengamatan secara langsung untuk menentukan hasil biaya alat yang lebih ekonomis karena alat berat aspal relatif mahal dan sangat penting untuk menyelesaikan pekerjaan proyek jalan raya. Dump truck, finisher asphalt, tandem roller, dan pneumatic tired roller adalah alat berat yang digunakan untuk menyelesaikan proyek ini. Mencakup biaya alat berat tinjauan pada proses pengaspalan jalan Kabupaten ruas Lilikira - Buangin dengan panjang ruas jalannya ialah 2,66 km, Dari hasil pembahasan diketahui produksi aktual pada asphalt finisher sebesar 46,154 ton/jam, untuk dump truck 5,217 ton/jam apa bila dihitung  15 unit Dump truck sebesar 78,255 ton/jam, Tandem roller sebesar 15 ton/jam, dan pneumatic tired roller 12,96 ton/jam. Harga Satuan pekerjan peralatan yaitu, dump truck Rp. 188,996.22/m³, Asphalt finisher Rp. 23,833.25/m³, Tandem roller Rp. 35,333.33/m³, dan  Pneumatic tired roller Rp. 54,012.35/m³.
Penggunaan Agregat Sungai Radda Kecamatan Masamba Kabupaten Luwu Utara Sebagai Campuran Beton Yenni Sri Agesya Kapuangan; Mara, Junus; Jujun Sanggaria, Olan
Paulus Civil Engineering Journal Vol. 7 No. 2 (2025): Paulus Civil Engineering Journal V7N2 2025
Publisher : Universitas Kristen Indonesia Paulus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/hms0b619

Abstract

The Radda River has aggregates with non-uniform grain distribution, clean, and visually seen with clear river flow. However, it is not yet known whether the Radda River aggregate can be used as structural concrete. This study was conducted to determine the compressive strength, flexural strength, splitting tensile strength of concrete and modulus of elasticity of concrete using aggregates from the Radda River. This study used the SNI 7656-2012 concrete design method with concrete quality f'c 25 MPa and 32 MPa through slump test on 28-day-old concrete. The average splitting tensile strength value of f'c 25 MPa concrete is 3.017 MPa. The average splitting tensile strength value of f'c 27 MPa concrete. The average flexural strength of f'c 25 MPa concrete is 3.759 MPa. The average flexural strength of f'c 32 MPa concrete is 4.176MPa. The results of the elastic modulus test for quality f'c 25 Mpa are 18,713.811 MPa. Theoretical value = 4700 x √25 = 23,500 MPa. The results of the elastic modulus test for quality f'c 32 Mpa are 27673.21667 Mpa. Aggregates from the Radda River can be used to achieve a quality of 25 MPa and 27 MPa using a material composition of 32 MPa.
Penggunaan Agregat Sungai Walanae Kabupaten Wajo Sebagai Bahan Campuran Beton Palimbong, Gita Yasty; Mara, Junus; Sanggaria, Olan Jujun
Paulus Civil Engineering Journal Vol. 7 No. 3 (2025): Paulus Civil Engineering Journal V7N3 2025
Publisher : Universitas Kristen Indonesia Paulus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/abn6m433

Abstract

Concrete is one type of construction material that is generally used for building projects, bridges, roads, and other buildings. The Walanae River in Wajo Regency is one of the rivers that produces materials in the form of aggregate used by the local community, but there is no certainty that the aggregate can be used as a concrete mixture. The formulation of the problem in this study is based on the background that has been described, namely, whether the characteristics of concrete using the aggregate of the Walanae River in Wajo Regency are qualified as concrete construction materials. To conduct laboratory tests on concrete samples using aggregate from the Walanae River, Wajo Regency to determine compressive strength, tensile strength, bending strength, and modulus of elasticity. Testing of 25 MPa and 30 MPa plan quality samples. The test pieces used were 42 samples, compressive strength 24 samples, tensile strength 6 samples, bending strength 6 samples, and elastic modulus 6 samples. Based on the results of the 28-day concrete testing research for 25 MPa quality, achieving the planned quality was 25,455 MPa. The results of the 28-day concrete test for 30 MPa quality did not reach the planned quality obtained 27,152 MPa. Aggregate from the Walanae River can be used effectively in the production of concrete of a quality suitable for the structure.
Co-Authors Anditia, Jeri Febriani, Lisa Hederanti Itu, Maria Prisila Helen A.I. Sopacua Hendrayana Jandri Kelin, Elia Kusuma, Ari Leonardo Massolo Luciana Buarlele Lumombang, Riski Christian Mangiri, Dewo Maria Febryanti Tandiaju Marlina Pasarong Meti Misel Boro Allo Nita Bonita Rombe Olan Jujun Sanggaria Paembonan, Honeysto Palimbong, Gita Yasty Pangloli, Ellen Kristin Parangga, Loryanti Elsandi Parubak, Dendy Satrio Parung, Herman Pascal Tiyouw, Herby Calvin Pongtimbang, Daktorian Randan, Fedelia Rante Kata , Monica Kalak Sandy, Desi Santy, Tri Suryanti Rapang Tonapa Tangdialla, Lintje Tammu Tanning, Jerianus Utami, Melani Yenni Sri Agesya Kapuangan