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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Panrita Abdi - Jurnal Pengabdian pada Masyarakat Journal of the Civil Engineering Forum JTT (Jurnal Teknologi Terpadu) Minda Baharu Jurnal Abdimas Mahakam Borneo Engineering : Jurnal Teknik Sipil Jurnal Penelitian Enjiniring Fakultas Teknik Unhas Bandar: Journal of Civil Engineering Journal of the Civil Engineering Forum Jurnal Pengabdian Siliwangi
Dahlia Patah, Dahlia
Universitas Sulawesi Barat
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Retrofitting on Flexural Strength of RC Columns Using Polyester Resin Concrete Dahlia Patah; Ashar Saputra; Andreas Triwiyono
Journal of the Civil Engineering Forum Vol. 2 No. 1 (January 2016)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (558.436 KB) | DOI: 10.22146/jcef.24305

Abstract

Concrete column structures damages due to flexural moment need to be repaired and strengthened to avoid of sudden failure by applying appropriate methods. The method applied in this study was retrofitting by applying polyester resin concrete. In order to know the effect of polyester resin concrete against axial load capacity, stiffness, ductility and the damage pattern of columns by eccentrically loaded, an experimental laboratory was carried out. In this study, three column specimens are tested. The dimension of the specimen is 150 mm x 150 mm and the high of the column are 1200 mm with the effective high is 600 mm and 600 mm for corbel. The column specimens have a fixed eccentricity of 50 mm. First, initial column tested before yield point of reinforcing bar reached and concrete crack limited to 0,4mm. Further, retrofitting applied to each initial column specimen using normal concrete and polyester resin concrete with the level of resin 15% and 20%, respectively. Retrofitting column tested again with the same loading of initial column until it reaches the collapse load. The result of experiment compares to analysis method by Nawy and Whitney which represent the analysis of normal concrete column capacity. The result showed that levels of resin to be used is 20% because of better workability compared to 15% resin. Further, compressive test on resin concrete cylinder showed that the resin level at 15% and 20% are 82.82 MPa and 76.65 MPa, respectively. The strength of KR-ii decreased about 33.523%. The strength of KR-15ii and KR-20ii increased 5.08% and 24.827% respectively compared to initial column. Specimen column stiffness KR-ii. KR-15ii and KR-20ii decreased about 76.22%, 24.50% and 37.65%, respectively from the initial column. Furthermore, ductility of KR-ii, KR-15ii and KR-20ii decreased about 1.512, 1.250 and 2.50, respectively. The changes of the ultimate capacity load of KR-ii, KR-15ii and KR-20ii by Nawy Method respectively -26.54%, 12.66%, and 13.83%, whereas the method of Whitney respectively -17.68%, 26.25%, and 27.56%. The use of polyester resin concrete can change the pattern of collapse from brittle to ductile columns.Keywords: retrofit, ductility, stiffness, flexural column, eccentricity
Pasir dan Kerikil Sungai Mappili sebagai material Lokal untuk Campuran Beton di Sulawesi Barat Amry Dasar; Dahlia Patah
BANDAR: JOURNAL OF CIVIL ENGINEERING Vol 3 No 2 (2021): Bandar: Journal of Civil Engineering
Publisher : Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/bjce.v3i2.1207

Abstract

Dalam upaya meningkatkan kekuatan beton dengan menggunakan material lokal yang ada di Sulawesi Barat, sebagian masyarakat dan pelaku konstruksi menggunakan material untuk campuran beton berupa pasir dan kerikil dari Sungai Mapilli. Akan tetapi, uji karakteristik dan kelayakan material lokal ini sebagai material bangunan belum banyak dilakukan. Di sisi lain, perlu diketahui komposisi campuran beton untuk mendapatkan mutu beton K300. Ini menjadi sulit dicapai dengan penggunaan material lokal yang ada di Sulawesi Barat. Penelitian ini bertujuan untuk memberikan data terkait karakteristik material lokal yaitu pasir dan kerikil dari Sungai Mapilli dan untuk mendapatkan kuat tekan terbaik dengan variasi fas 40%, 50% dan 60%. Dari hasil pengujian diperoleh bahwa materil kerikil dan pasir Mapili layak untuk digunakan untuk campuran beton. Selain itu, didapatkan kuat tekan dengan FAS 40% dan 50% telah memenuhi kuat tekan rencana untuk bangunan konstruksi yaitu 24.9MPa.
The Effect of Different Curing Methods on Concrete Strength Dahlia Patah; Amry Dasar; Poppy Indrayani
BANDAR: JOURNAL OF CIVIL ENGINEERING Vol 4 No 1 (2022): Bandar: Journal of Civil Engineering
Publisher : Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/bjce.v4i1.1536

Abstract

This study discusses the effect of method and age of treatment on increasing the strength of normal concrete in a tropical environment. A total of forty-five (45) concrete cylinders were treated with five different treatment methods, namely immersion in fresh water, immersion in sea water, wrapped in wet burlap sack, wrapped in plastic, and flushed with plain water. For each of these treatment methods, the average compressive strength of 3 cylinders of concrete was taken for each treatment period of 7, 28 and 91 days. The results showed that the immersion method with fresh water produced concrete specimens with the highest 28 day compressive strength of 42.99 N/mm2 followed by treatment with plastic wrap with a value of 40.94 N/mm2. It was found that the method of wrapping in burlap sacks at the initial age of cement hydration obtained a higher compressive strength than all immersion methods. And for the long term, concrete strength increased up to 19% with the method of treatment immersed in seawater and treatment with fresh water on the concrete strength at the age of 28 days.
Durabilitas Baja Tulangan pada Beton Menggunakan Material Batu Gamping, Pasir Laut dan Air Laut dalam Campuran Beton Dahlia Patah; Amry Dasar; Amalia Nurdin
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 28, Nomor 1, JULI 2022
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (640.992 KB) | DOI: 10.14710/mkts.v28i1.43380

Abstract

Seawater and sea sand have potential used in concrete. The use of limestone in the concrete has been increasing due to benefits as aggregate include good strength and low possibility of alkali-silica reaction. Hence, it is imperative to exploit seawater, sea sand and limestone in concrete particularly corrosion issues follow it. This study aims to evaluate the effect of limestone, seawater, and sea-sand for mixing concrete on the corrosion of reinforcing bar. The specimen used in this study was a concrete block with strength design of 25 MPa and plain reinforcing bar with 10 mm in diameter was embedded. The result of half-cell potential (HCP) will be compared with the result of visual observations for actual corrosion after HCP readings indicates the specimens has been corroded. The results showed that reinforcing bar in all specimens mixed with seawater and using 100% limestone mixed with plain water using sea-sand is estimated to be corroded and corresponding with the actual corrosion. Further, it can be observed the use of washed sea-sand combine with 50% of limestone and mixed with seawater potentially increase the strength of concrete up to 50%, however, the risk of corrosion as well.
Strength Performance of Concrete Using Rice Husk Ash (RHA) as Supplementary Cementitious Material (SCM) Dahlia Patah; Amry Dasar
Journal of the Civil Engineering Forum Vol. 8 No. 3 (September 2022)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.3488

Abstract

Rice husk ash (RHA) is an industrial waste obtained from raw material that is processed into ash through the combustion process. It is a solid waste in fine powder form, which contains a large amount of silica and can promote RHA through combustion under certain conditions. Furthermore, it has a high pozzolanic activity due to a large amount of silica, which is a kind of supplementary cementitious material (SCM). According to ASTM C618, RHA has potential as sustainable material that meets the specification of the chemical configuration of pozzolan compound that can be used in cement products and concrete mixing. The use of RHA as SCMs in concrete construction contributes to sustainability and eco-material. Therefore, this study aims to evaluate the application of RHA as SCM on the strength base performance of concrete. The sample was directly collected from the rice field after the natural combusting process without additional treatment, controlled burning temperature, or time. RHA was used as an admixture for cement substitute and the mechanical characteristics were evaluated using a cylindrical concrete specimen made with 100-mm diameter and 200-mm height. After 24-hours, the concrete specimens were demolded and immediately immersed curing in fresh water with uncontrolled laboratory condition until the day of testing. The results showed that RHA with a replacement ratio of 7.5% obtained an optimum compressive strength of 40.65 MPa and 48.79 MPa at 28 and 91 days, respectively. The split tensile test also gave an optimum replacement ratio of RHA is 10% with 4.57 MPa at 28 days. These results provide good input on using RHA as SCM for concrete strength base performance and future sustainable material.
SOSIALISASI MEMBANGUN RUMAH SEDERHANA TAHAN GEMPA UNTUK PARA TUKANG DI DESA MEKKATTA KECAMATAN MALUNDA, MAJENE-SULAWESI BARAT Amry Dasar; Dahlia Patah; Apriansyah
Panrita Abdi - Jurnal Pengabdian pada Masyarakat Vol. 6 No. 4 (2022): Jurnal Panrita Abdi - Oktober 2022
Publisher : LP2M Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/pa.v6i4.18051

Abstract

Gempa Majene dan Mamuju berkekuatan M 6,2 pada 15 Januari 2021 pukul 02.28.17 WITA menyebabkan korban jiwa dan kerusakan parah pada bangunan rumah tinggal dan fasilitas umum.  Banyaknya rumah masyarakat yang dibangun tidak berdasarkan kaidah rumah sederhana tahan gempa sebagaimana telah diatur melalui SNI 1726. Kegiatan  pengabdian kepada  masyarakat ini bertujuan memberikan sosialisasi tentang membangun rumah sederhana tahan gempa kepada masyarakat dan pemberi jasa konstruksi/tukang di daerah yang terdampak bencana ini, yakni Desa Mekkatta Kec. Malunda Kab. Majene Sulawesi Barat. Pengabdian  ini  dinyatakan  berhasil ditinjau dari aspek afektif dan kognitif, peserta penyuluhan  telah memahami pentingnya  dan paham aturan teknis bangunan tahan gempa. Hal ini dibuktikan dari hari kusioner post-test setelah penyampaian materi. Sedangkan dari aspek psikomotorik, Tim Penyuluh belum dapat memantau perubahan perilaku terhadap sistem perencanaan dan pembangunan bangunan tahan gempa yang terjadi pada peserta penyuluhan, mengingat terbatasnya waktu dan minimnya dana penyuluhan. --- An earthquake hit Majene and Mamuju regency with an intensity of 6.2 M on January 15, 2021, at 02.28.17 WITA, which caused fatalities and severe damage to residential buildings and public facilities. Number of community houses built is not based on the rules of earthquake-resistant houses as regulated through SNI 1726. This society service activity aims to provide socialization about making earthquake-resistant houses for the community and contractor or builders in areas affected by this disaster, namely Desa Mekkatta, Malunda District, Majene Regency, West Sulawesi Province. This service was declared successful in terms of affective and cognitive aspects, and the counseling participants understood the importance and stick to the detail of engineering design for earthquake-resistant buildings. In terms of the psychomotor aspect, the counseling Team has not been able to monitor changes in behavior towards the planning system and construction of earthquake-resistant buildings that were applied by participants since the time and counseling funds were limited.
PENGARUH LIMBAH BETON SEBAGAI PENGGANTI AGREGAT KASAR PADA KEKUATAN BETON Dahlia Patah; Amry Dasar
Jurnal Teknologi Terpadu Vol 10, No 2 (2022): JTT (Jurnal Teknologi Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v10i2.1580

Abstract

Banyak struktur di Indonesia sekarang telah mencapai akhir umur desainnya atau tidak dibangun sesuai dengan spesifikasinya. Pekerjaan pembongkaran atau pemeliharaan pada struktur tersebut menghasilkan sejumlah besar puing-puing beton. Mendaur ulang limbah beton akan mengurangi ruang TPA yang berharga dan menghemat sumber daya alam. Penelitian ini bertujuan untuk mengetahui kekuatan beton yang dibuat dengan agregat kasar dari limbah beton. Potensi limbah beton sebagai pengganti agregat kasar dalam beton telah diteliti. Limbah beton daur ulang digunakan sebagai agregat. Campuran beton dengan kekuatan karakteristik 28 hari yaitu 24,9 MPa dibuat dengan menggunakan rasio air/semen 0,4. Perkembangan kekuatan campuran beton yang mengandung agregat limbah beton dibandingkan dengan beton konvensional. Kuat tekan dan kuat tarik belah beton yang dibuat dengan agregat kasar daur ulang tergantung pada proporsi campuran. Secara umum, campuran beton yang mengandung agregat limbah beton daur ulang hingga 40% mencapai tingkat kekuatan antara 93,7 hingga 98,5% dibandingkan dengan beton konvensional. Hasil kuat tekan beton dengan limbah beton 10% menunjukkan nilai optimum pada umur 28 hari adalah 40,03 MPa dengan persentase kenaikan 16,4% dari beton normal. Hal ini menunjukkan bahwa limbah beton berpotensi untuk dimanfaatkan sebagai agregat kasar pada campuran beton.
PENGARUH VARIASI KOMPOSISI AGREGAT KASAR TERHADAP SIFAT MEKANIK BETON Amry Dasar
Jurnal Teknologi Terpadu Vol 11, No 1 (2023): JTT (Jurnal Teknologi Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v11i1.1732

Abstract

Pertumbuhan industri konstruksi semakin pesat terutama di bidang material, salah satunya penggunaan material beton untuk bahan konstruksi. Gradasi agregat kasar memegang peranan penting untuk menentukan mutu beton yang memiliki kinerja tinggi. Penelitian ini bertujuan untuk mengetahui komposisi terbaik pada variasi pencampuran dua jenis ukuran agregat kasar terhadap sifat mekanik beton yaitu kuat tekan beton dan kuat belah beton. Variasi agregat kasar pada campuran beton yang digunakan yaitu ukuran 0,5-1 cm dan 1-2 cm dengan perbandingan 100% : 0%, 70% : 30%, 60% : 40%, 50% : 50%, 40% : 60%, 30% : 70% dan 0% :100%. Faktor Air Semen (FAS) yang digunakan yaitu 0.4. Sebanyak 63 benda uji silinder dengan diameter 10 cm dan tinggi 20 cm digunakan pada penelitian ini. Pengujian kuat tekan beton dilakukan pada umur 7 hari dan 28 hari sedangkan pengujian kuat belah beton dilakukan pada umur 28 hari. Hasil penelitian didapatkan proporsi terbaik variasi ukuran agregat kasar yaitu kombinasi ukuran 0,5-1 cm 50%  dan ukuran 1-2 cm 50% (A50B50) dengan kuat tekan pada umur 28 hari sebesar 45,17 Mpa dengan peningkatan kuat tekan sebesar 21,7% dan 37,44% terhadap benda uji masing-masing A100B0 dan A0B100.
The Impact of using Rice Husks Ash, Seawater and Sea Sand on Corrosion of Reinforcing Bars in Concrete Dahlia Patah; Amry Dasar
Journal of the Civil Engineering Forum Vol. 9 No. 3 (September 2023)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.6016

Abstract

The global increase in infrastructure development has led to potential shortages of river sand and tap water, particularly in coastal areas, posing challenges for concrete production. To address this issue, numerous studies have been conducted on the use of seawater and sea sand as sustainable alternatives. Rice Husks Ash (RHA), a fine powder derived from the combustion process of agricultural husks, has emerged as potential eco-friendly solution due to its excellent pozzolanic properties, making it a viable candidate for partially replacing cement in concrete. This substitution enhances concrete durability and strength as well as reduces the risk of corrosion in harsh environmental conditions. Therefore, this study examined impact of seawater for mixing, sea sand and substitution ratio of RHA on corrosion of reinforcing bars. The specimen used in the experiment had a thickness of 150 mm, with rectangular areas of 400 x 400 mm and plain steel bars with a diameter of 10 mm. Corrosion levels and concrete quality were evaluated using the half-cell potential (HCP) method and hammer test, respectively. The results showed that all specimens mixed with seawater, river sand, and different substitution ratios of RHA (0%, 5%, 10%, and 15%) exhibited corrosion, as confirmed by the HCP method. However, only the specimen mixed with tap water, sea sand, and an addition of 5% RHA demonstrated effective resistance to corrosion, comparable to normal concrete.
BETON BERPORI DENGAN VARIASI UKURAN AGREGAT KASAR Dahlia Patah; Amry Dasar
Jurnal Teknologi Terpadu Vol 11, No 2 (2023): JTT (Jurnal Teknologi Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v11i2.1762

Abstract

Ukuran agregat merupakan faktor penting yang mempengaruhi kuat tekan beton berpori. Penelitian ini berfokus pada hubungan antara ukuran agregat, kuat tekan, struktur pori, permeabilitas dan kemudian memahami pengaruh ukuran agregat terhadap kuat tekan beton berpori. Sebanyak tiga ukuran agregat kasar 5-10 mm, 10-20 mm dan 20-30 mm disiapkan. Pada penelitian ini dibuat dua variasi kombinasi agregat kasar. Variasi 1 untuk kombinasi agregat kasar ukuran 5–10 mm dan 10–20 mm. Variasi 2 untuk kombinasi ukuran agregat kasar 20–30 mm dan 10–20 mm. Untuk setiap variasi dengan kombinasi pencampuran 100%:0%, 75%:25%, 50%:50%, 25%:75%, dan 0%:100%. Metode yang digunakan adalah pengujian kuat tekan, porositas, dan permeabilitas. Hasil pengujian menunjukkan bahwa kuat tekan komposisi 50%:50% pada Variasi 1 meningkat pesat dengan ukuran agregat 10-20mm dan 5-10mm dengan nilai 22,40 MPa yang memenuhi persyaratan minimum yang ditentukan oleh Standar Nasional Indonesia yaitu Kelas B (aplikasi taman parkir). Sedangkan penggunaan agregat ukuran 100% seragam memiliki kuat tekan yang rendah.
Co-Authors . Apriansyah ., apriansyah ., Yusman Amalia Nurdin Amalia Nurdin Andreas Triwiyono Apriansyah Apriansyah Apriansyah - Ashar Saputra Caronge, Muhammad Akbar Dasar, Amry Herni Suryani IBRAHIM DJAMALUDDIN, IBRAHIM Idris, Risma Nofianti Mahmuda, Ali Fauzi Manaf, Abdi Nirwana, Hafsah Noor, Nurazuwa Md. Nurdin, Amalia Okviyani, Nur Permadi, Yoga Dwi Poppy Indrayani Ridhayani, Irma Sainuddin Sainuddin, Sainuddin Saudi, Akbar Indrawan Sugiarto Cokrowibowo Yusman Yusman, Yusman