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All Journal Media Teknik Sipil POROS TEKNIK Teras Jurnal JST ( Jurnal Sains Terapan ) Abdimas Universal Nusantara Civil Engineering Journal Jurnal Polimesin

Karmila Achmad

Politeknik Negeri Balikpapan

Author-ID : 218700

Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Other

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Pengaruh Bentuk Galvanis Sebagai Serat Pada Beton Ditinjau Dari Kuat Tarik Belah Dan Kuat Lentur Beton Achmad, Karmila; Sunarno, Sunarno
POROS TEKNIK Vol. 9 No. 1 (2017)
Publisher : P3M Politeknik Negeri Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31961/porosteknik.v9i1.507

Serat dalam beton berfungsi mencegah retak-retak sehingga menjadikan beton lebih kuat daripada beton tanpa serat. Kawat galvanis banyak digunakan karena murah, mudah dibentuk dan mudah perawatannya. Tujuan penelitian untuk mendapatkan material serat buatan yang relatif murah dan mampu meningkatkan kekuatan beton secara optimal ditinjau dari kuat tarik dan kuat lentur. Material agregat halus yang digunakan dalam penelitian ini adalah material lokal pasir Samboja. Jenis Serat yang digunakan berupa serat buatan kawat galvanis berbentuk linting, spiral dan crimped. Hasil penelitian menunjukan bahwa benda uji BC1 (Crimped Ñ„ 1cm) memiliki kekuatan tarik terbesar dan L5 (Linting 5) memiliki kekuatan lentur terbesar dibandingkan benda uji lainnya. Besarnya kuat tarik yaitu 10,44 MPa dan kuat lentur sebesar 7,03 MPa.

METODE EKSPERIMENTAL PERKUATAN KOLOM BETON BERTULANG MENGGUNAKAN FRP Achmad, Karmila; SMD, Agoes; ., Tavio
Media Teknik Sipil Vol 12, No 2 (2014): Agustus
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

METODE EKSPERIMENTAL PERKUATAN KOLOM BETON BERTULANG MENGGUNAKAN FRP Experimental Method Of Strengthening Concrete Columns Using FRPKarmila Achmad1, Agoes SMD2, Tavio31Jurusan Teknik Sipil Fakultas Teknik ? Politeknik Negeri Balikpapan2Jurusan Teknik Sipil Fakultas Teknik ? Universitas Brawijaya Malang3Jurusan Teknik Sipil Fakultas Teknik ? Institut Sepulun Nopember SurabayaAlamat korespondensi: Jl Soekarno Hatta Km. 08, Balikpapane-mail: 1)milabpp@yahoo.co.idAbstractThe column is an important structure element because the failure of column will have direct impact to other structure components, so that the ruin of structural column is an important thing to be observed. The research use experimental method. The aim of this research is to get improving of strength and ductility in column specimen which is given the FRP strengthener (Fiber Reinforced Polymer) compared with original column. There are 3 specimens used. They are C-1 (original column), C-1G (column with GFRP strengthener 1 layer) and C-1C (column with CFRP strengthener 1 layer). From the research got the increasing Pmax toward original column is 33,52% and 54,97%, the increasing of dmax is 6,65% and 81,18%, also the increasing of Mmax is 32,41% and 55,36% each for C-1G and C-1C. Ductility indexes taken on three positions are plastic hinge zone, a half high of column effective and as high as column effective. From analyze result got the increasing of displacement ductility toward C-1 for C-1G is -34,20%, -28,46% and -12,74% and C-1C is 64,48%, 108,74% and 118,68%, each for plastic hinge zone, a half high of column effective and as high as column effective. In column C-1G happened the decreasing of ductility value because there has been destruction in column head when the test was running. Key words : Experimental method, FRP, RC, Strengthener columnAbstrakKolom merupakan elemen struktur penting karena kegagalan kolom akan berpengaruh langsung terhadap komponen struktur lainnya , sehingga kehancuran kolom struktural merupakan hal yang penting untuk dicermati . Penelitian ini menggunakan metode eksperimen . Tujuan dari penelitian ini adalah untuk mendapatkan meningkatkan kekuatan dan daktilitas dalam spesimen kolom yang diberi FRP penguat ( Fiber Reinforced Polymer ) dibandingkan dengan kolom awal . Ada 3 spesimen yang digunakan . Mereka adalah C - 1 ( kolom asli) , C - 1G ( kolom dengan GFRP penguat 1 lapisan ) dan C - 1C ( kolom dengan CFRP penguat 1 lapisan ) . Dari penelitian mendapat peningkatan Pmax menuju kolom awal adalah 33,52 % dan 54,97 % , peningkatan dmax adalah 6,65 % dan 81,18 % , juga meningkatnya Mmax adalah 32,41 % dan 55 , 36 % masing-masing untuk C - 1G dan C - 1C . Indeks daktilitas diambil pada tiga posisi yang zona sendi plastis , setengah tinggi kolom yang efektif dan setinggi kolom yang efektif . Dari hasil analisis mendapat peningkatan daktilitas terhadap - C 1 untuk C - 1G adalah -34,20 % , -28,46 % dan -12,74 % dan C - 1C adalah 64,48 % , 108,74 % dan 118,68 % , masing-masing untuk zona sendi plastis , setengah tinggi kolom yang efektif dan setinggi kolom yang efektif . Dalam kolom C - 1G terjadi penurunan nilai daktilitas karena sudah ada kerusakan di kepala kolom saat tes berjalan .Kata kunci : metode eksperimental , FRP , RC , kolom Strengthener

KUAT TEKAN MORTAR DAN SILINDER BETON PADA PERPADUAN MATERIAL LOKAL PASIR SAMBOJA DENGAN PASIR PALU Achmad, Karmila; Sunarno, Sunarno
Media Teknik Sipil Vol 17, No 1 (2019): Februari
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v17i1.6991

Pasir Samboja merupakan material lokal Balikpapan yang relatif murah dan belum banyak digunakan dalam campuran beton oleh masyarakat Balikpapan. Hal ini karena material ini memiliki butiran yang sangat halus, yang mengakibatkan jenis pasir ini tidak masuk dalam ke 4 zona agregat halus yang merupakan syarat dalam campuran beton. Sehingga dalam penggunaannya pasir Samboja perlu dipadukan dengan jenis pasir lainnya yang memiliki butiran agak kasar. Tujuan penelitian untuk mendapatkan sifat fisik agregat halus lokal di Balikpapan dalam campuran beton dan mendapatkan proporsi paduan agregat halus lokal Balikpapan yang optimal ditinjau dari besarnya Kuat Tekan Beton. Dalam penelitian ini ada 66 mortar dan 66 silinder beton dengan variasi persentase pasir Samboja dalam agregat halus campuran beton. Hasil yang diperoleh menunjukan bahwa proporsi pasir Samboja yang memenuhi kriteria agregat halus dalam campuran beton adalahÂ dibawah 70% dengan MHB 1,64 mendekati zona 4 (pasir Agak Halus). Benda uji P50 dengan proporsi pasir Palu sebesar 50% dan pasir Samboja sebesar 50% memberikan nilai kuat tekan beton terbaik pada umur 28 hari yaitu 31,33 MPa dengan peningkatan kuat tekan sebesar 7,11% terhadap S100 dan jika ditinjau dari tren kuat tekan yang terjadi adalah perpaduan pasir Palu dan pasir Samboja memberikan nilai yang baik pada P50 dan P60.

PASIR KANDILO DAN KERIKIL PETANGIS SEBAGAI MATERIAL LOCAL TANAH GROGOT DALAM CAMPURAN BETON Achmad, Karmila
Media Teknik Sipil Vol 13, No 2 (2015): Agustus
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v13i2.2561

PASIR KANDILO DAN KERIKIL PETANGIS SEBAGAI MATERIAL LOCAL TANAH GROGOT DALAM CAMPURAN BETONKandilo Sand And Gravel Petangis As Local Material Land Grogot In Mixed ConcreteKarmila AchmadJurusan Teknik Sipil Politeknik Negeri Balikpapan Alamatkorespondensi : Jl Soekarno Hatta Km. 08, Balikpapanemail: milabpp@yahoo.co.idAbstractIn the effort to utilize local material, some of Tanah Grogot people use mix concrete of Kandilo sand and Petangis Gravel instead of common material, Palu Sand and Palu Gravel. The characteristics of these local material have not been identified. The purpose of this research are to give data of Tanah Grogot local materialâ€™s characteristic and to get the highest concrete strength for mixing variation commonly used by Tanah Grogot people, Kalimantan Timur. There are 4 variations of mix-concrete that were used i.e. Palu Sand + Palu Gravel (PPKP), Palu Sand+Petangis Gravel (PPKG), Kandilo sand+Palu Gravel (PGKP), Kandilo sand + Petangis Gravel (PKG). The results of the test show that the best average concrete strength was received by PPKG, 32.78 MPa, and the lowest average concrete strength belong to PKG, 17.05 MPa.Keywords: Petangis gravel, local Material, Kandilo sand, Tanah GrogotAbstrakDalam upaya memanfaat material local sebagian masyarakat Tanah Grogot menggunakan campuran beton berupa pasir Kandilo dan kerikil Petangis disamping material yang umum digunakan, yaitu pasir Palu dan kerikil Palu. Untuk karakteristik dan kelayakan material local ini sebagai material bangunan belum dilakukan penelitian. Penelitian ini bertujuan untuk memberikan data terkait karakteristik material local tanah grogot dan mendapatkan kuat tekan terbaik untuk perpaduan material bangunan yang umum digunakan oleh masyarakat Tanah Grogot, Kalimantan Timur. Ada 4 variasi campuran beton yang akan digunakan yaitu Pasir Palu+Kerikil Palu (PPKP), Pasir Palu+Kerikil Petangis (PPKG), Pasir Kandilo+Kerikil Palu (PGKP), Pasir Kandilo+Kerikil Petangis (PKG). Dari hasil pengujian diperoleh kuat tekan rata-rata terbaik pada variasi sampel PPKG yaitu 23,78 MPa dan kuat tekan rata-rata terendah adalah variasi sampel PKG yaitu 17,05 MPa.Kata kunci : Kerikil Petangis, Material local, Pasir Kandilo, Tanah Grogot

PENGARUH PENGEKANGAN GFRP TERHADAP KEKUATAN DAN DAKTILITAS KOLOM BETON BERTULANG PERSEGI AKIBAT BEBAN SIKLIK Achmad, Karmila; SMD, Agoes; ., Tavio
Media Teknik Sipil Vol 10, No 2 (2012): Agustus
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v10i2.1789

Karmila Achmad1, Agoes SMD2 & Tavio31Mahasiswa Program Magister Teknik Sipil Struktur Universitas Brawijaya, Malang dan Dosen Politeknik NegeriBalikpapan2 Guru Besar Teknik Sipil Struktur Universitas Brawijaya, Malang3Dosen Teknik Sipil Struktur-FTSP Institut Teknologi Sepuluh Nopember, SurabayaEmail : milabpp@yahoo.co.idABSTRACTThe aim of this research is to get improving of strength and ductility in column specimen giventhe GFRP strengthener (Glass Fiber Reinforced Polymer) toward with original column, by using thecyclic load as the fix representative of quake load. There are two specimens full scale used. Theyare C-1 (original column) and C-1G (column with GFRP strengthener 1 layer). From the researchgot Pmax sequentially is 278,9 kN and 372.4 kN, and dmax is 53.24 mm and 56.78 mm, each for C-1and C-1G. For C-1 column, the concrete gets damage in plastic hinge zone at drift ratio 3.5%indicated by bending of longitudinal steel bar and spalling of cover concrete. The test for C-1G endsin third cycle at drift ratio 5% and gets damage in fracture of GFRP in plastic hinge zone. Thedamage is the changing of resin color the circumferential direction in three spots. They are as longas 10, 11 and 18 cm. Ductility index taken on three positions are plastic hinge zone, column with ahalf high effective and as high as effective column. From the analyze result got ductility index C-1on the three positions are 1.65; 1.70; 1,97 and ductility index C-1G are 1,44; 1,44 and 1,38 each forplastic hinge zone, a half high effective and as high as effective columnKey words : ductility, GFRP, strength, external confinement, cyclic

The Influence of Iron Lathe Waste Addition to the Flexural Strength of Galvanized Fiber Concrete Khasanah, Rachmawati Suci; Achmad, Karmila; Huda, Masrul
Nusantara Civil Engineering Journal Vol 1 No 1 (2002): Nusantara Civil Engineering Journal
Publisher : Civil Engineering Dept, Balikpapan State Polytechnics

Galvanized wire and iron lathe are alternative fiber types in fiber concrete mixes. Galvanized wire has flexural properties, no corrosion it is relatively inexpensive, while iron lathe waste is known to increase the flexural strength of beams. The study uses 5 cm long galvanized wire with 2% cement by weight and uses iron lathe waste. The purpose of this study is to obtain the value of the flexural strength of the beam.The test specimens used were 12 samples with a variation of 3 pieces each, with the code for normal concrete specimens (NA-NB-NC), 2% galvanized fiber concrete (2A-2B-2C), galvanized fiber concrete with iron lathe variation 10% (10A-10B-10C), galvanized fiber concrete with iron lathe variation 14% (14A-14B-14C). The test was carried out when the concrete was 28 days old with a plan of 22.5 MPa concrete quality.The test results are the average value of the flexural strength of normal concrete is 0.900 MPa, the flexural strength of galvanized fiber concrete is 0.975 MPa, the flexural strength of galvanized fiber concrete with the addition of waste iron lathe with a variation of 10% is 1.425 MPa, variations 14% is 1,125 MPa. The highest percentage of flexural strength increase ratio for normal concrete is 10% variation of 58.333% and for galvanized fiber concrete is 10% variation of 46.154%.

PENGARUH BAHAN TAMBAH GLENIUM TERHADAP KEKUATAN BETON POROUS Ulfa, Anis Aulia; Achmad, Karmila; Giarto, Rahmat Bangun
JST (Jurnal Sains Terapan) Vol 10, No 2 (2024)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jst.v10i2.2286

Kota Balikpapan, sebagai salah satu wilayah penting di Provinsi Kalimantan Timur, sering menghadapi permasalahan banjir dan longsor yang menyebabkan kerusakan infrastruktur, khususnya pada jalan raya. Untuk mengatasi kerusakan ini, salah satu solusi yang dapat diterapkan adalah penggunaan beton porous, yang memungkinkan peresapan air ke dalam tanah, mengurangi limpasan permukaan. Penelitian ini mengeksplorasi kekuatan beton porous dengan variasi agregat ukuran 1/2 dan 2/3 serta penambahan fly ash (15%) dan akselerator Glenium (0,08%).Penelitian ini melibatkan pengujian material beton porous dengan dua jenis agregat kasar (ukuran 1/2 dan 2/3) yang diuji pada silinder beton berukuran diameter 15 cm dan tinggi 30 cm. Pengujian dilakukan pada umur 14 dan 28 hari untuk mengevaluasi pengaruh variasi ukuran agregat, penambahan fly ash, dan Glenium terhadap kekuatan tekan beton.Hasil penelitian menunjukkan bahwa beton porous dengan agregat lebih kecil (ukuran 1/2) memiliki kekuatan tekan yang lebih tinggi dibandingkan dengan agregat yang lebih besar (2/3). Selain itu, penambahan akselerator Glenium SKY 8770 secara signifikan meningkatkan kekuatan tekan beton pada umur 14 dan 28 hari, mempercepat proses hidrasi dan pengerasan beton. Penelitian ini memberikan kontribusi penting dalam perancangan perkerasan ramah lingkungan yang lebih tahan terhadap kerusakan akibat banjir.

Peningkatan Kompetensi dan Pembuatan Teknologi Terbaru Beton Porous di Jurusan Teknik Konstruksi dan Perumahan SMKN 1 Balikpapan Achmad, Karmila; Sulistyo, Totok; Sunarno, Sunarno; Kiptiah, Mariatul; M. Ain, Mohammad Isram
Abdimas Universal Vol. 7 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Balikpapan (LPPM UNIBA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/abdimasuniversal.v7i1.512

The city of Balikpapan has many flood points every year,.Flood events are a priority issue for the Balikpapan City Government, in 2017 there was an increase in flood events by 89 incidents. To solve this problem is to apply the construction with the latest environmentally friendly technology, namely porous concrete so that surface water can seep into the ground and can become a groundwater reserve. Porous concrete is the latest type of concrete technology with high porosity which is applied as a concrete plate which allows rainwater and water from other sources to pass through. Limited facilities and infrastructure, lack of teaching staff relevant to the Construction and Housing Study Program at SMKN 1 Balikpapan School so that they cannot carry out concrete manufacturing and testing because this is a basic competency that every student must have. The activity began by formulating a program that was relevant to the knowledge and research of the PkM team of the Civil Engineering Department of the Balikpapan State Polytechnic and the problems that exist around Balikpanan City. SMKN 1 Balikpapan to carry out follow-up activities or programs to be implemented, activity planning, activity schedules and activity output. The activities were carried out for 2 days which included socialization and practice of making porous concret.

Studi Eksperimental Pemanfaatan Abu Pelepah Pisang sebagai Substitusi Semen pada Beton: Studi Eksperimental Pemanfaatan Abu Pelepah Pisang sebagai Substitusi Semen pada Beton Ulfa, Anis Aulia; Giarto, Rahmat Bangun; Achmad, Karmila; Kiptiah, Mariatul; Fatmawati, Fatmawati
Teras Jurnal : Jurnal Teknik Sipil Vol. 16 No. 1 (2026): Teras Jurnal
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i1.1340

Abstrak Penelitian ini bertujuan untuk menganalisis pengaruh substitusi abu pelepah pisang terhadap kuat tekan beton pada umur 14 dan 28 hari. Abu pelepah pisang diperoleh melalui proses pembakaran pada suhu ±600°C, kemudian disaring hingga lolos saringan 0,075 mm. Variasi substitusi terhadap berat semen yang digunakan adalah 0%, 2,5%, 5%, 7,5%, dan 10%. Pengujian kuat tekan dilakukan pada benda uji silinder berukuran 150×300 mm sesuai SNI 1974:2011. Hasil penelitian menunjukkan bahwa penambahan abu pelepah pisang berpengaruh terhadap peningkatan kuat tekan beton. Nilai kuat tekan tertinggi diperoleh pada variasi 7,5% dengan kuat tekan sebesar 12,87 MPa pada umur 14 hari dan 15,02 MPa pada umur 28 hari, meningkat sebesar 17% dibanding beton normal. Namun, pada kadar 10% terjadi penurunan kuat tekan hingga 13,09 MPa. Hasil ini menunjukkan bahwa abu pelepah pisang dapat dimanfaatkan sebagai bahan substitusi semen hingga kadar optimum 7,5% tanpa menurunkan kekuatan beton. Penelitian ini mendukung konsep green building melalui pemanfaatan limbah biomassa lokal sebagai material ramah lingkungan. Kata kunci: Abu pelepah pisang, substitusi semen, kuat tekan beton, beton ramah lingkungan, green building Abstract This study aims to analyze the effect of banana pseudostem ash substitution on the compressive strength of concrete at the ages of 14 and 28 days. The banana pseudostem ash was produced by burning the dried pseudostems at a temperature of approximately 600°C and sieving the resulting ash through a 0.075 mm sieve. The substitution levels of cement by weight were 0%, 2.5%, 5%, 7.5%, and 10%. Compressive strength tests were conducted on cylindrical specimens measuring 150×300 mm in accordance with SNI 1974:2011. The results show that the addition of banana pseudostem ash positively affects the compressive strength of concrete. The highest compressive strength was obtained at a 7.5% substitution level, with values of 12.87 MPa at 14 days and 15.02 MPa at 28 days, representing a 17% increase compared to normal concrete. However, at a 10% substitution level, the compressive strength decreased to 13.09 MPa. These findings indicate that banana pseudostem ash can be effectively utilized as a partial cement replacement up to an optimum level of 7.5% without reducing concrete strength. This research supports the green building concept through the utilization of local biomass waste as an environmentally friendly construction material. Keywords: Pseudostem ash, cement substitution, compressive strength, eco-friendly concrete, green building

Bio-hybrid carbon fibre/OPFF epoxy composites: mechanical, interfacial, and thermal performance Randis, Randis; Hermansyah, Hadi; Syahruddin, Syahruddin; Achmad, Karmila; Yusrina, Yasmin Zulfati; Samosir, Devina Sanchia; Wibowo, Edi; Raharjo, Rudianto
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.8587

The development of sustainable lightweight composites with reliable structural integrity is important for transportation and construction applications. This study investigates a bio-hybrid sandwich composite comprising carbon fibre skins and Oil Palm Frond Fibre (OPFF) as a natural porous core, with emphasis on improving interfacial integrity through chemical modification. The primary objective is to evaluate the effectiveness of sequential NaOH and H₂O₂ treatment in enhancing mechanical performance, interfacial bonding, and thermal stability of the composite system. Hybrid composites were fabricated using an epoxy matrix, combining carbon fibre reinforcements with untreated and chemically treated OPFF cores in various fibre configurations. Mechanical properties were assessed under tensile, flexural, and impact loading, while interfacial morphology and thermal behaviour were examined using microscopy and thermal analysis. The results demonstrate that NaOH + H₂O₂ treatment improves composite performance, with treated unidirectional hybrids exhibiting the highest tensile and flexural strengths. Microscopic observations reveal a substantial reduction in fibre pull-out, debonding, and skin–core delamination, indicating enhanced interfacial integrity and more efficient load transfer. In addition, treated composites show improved thermal stability. The novelty of this work lies in demonstrating that chemically treated OPFF can function as a sustainable sandwich core, where improved interfacial bonding plays a decisive role in suppressing delamination and enhancing overall composite performance.

Co-Authors A.A. Ketut Agung Cahyawan W Agoes SMD Chatarina Umbul Wahyuni Edi Wibowo Elisabeth Milaningrum Fatmawati, Fatmawati Giarto, Rahmat Bangun Hadi Hermansyah, Hadi Huda, Masrul Khasanah, Rachmawati Suci Lilik Damayanti, Lilik M. Ain, Mohammad Isram Mariatul Kiptiah Nur Vita Opu, Nur Vita Randis Randis Rudianto Raharjo Samosir, Devina Sanchia Sunarno Sunarno Syahruddin Syahruddin Tavio, Tavio Totok Sulistyo Ulfa, Anis Aulia Yusrina, Yasmin Zulfati

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