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All Journal Journal of the Civil Engineering Forum Potensi : Jurnal Sipil Politeknik Forum Mekanika TERANG : Jurnal Pengabdian Pada Masyarakat Menerangi Negeri Jurnal Teknologi Bahan dan Barang Teknik
Devita Mayasari
Institut Teknologi PLN
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Regional Frequency Analysis of Rainfall, using L-Moment Method, as A Design Rainfall Prediction Devita Mayasari; Pratiwi Setyaning Putri
Journal of the Civil Engineering Forum Vol. 7 No. 2 (May 2021)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.60498

Abstract

Frequency analysis is a method for predicting the probability of future hydrological events, based on historical data. Generally, frequency analysis of rainfall data and discharge data is performed using the moment method, but this method has a large bias, variant, and slope, thus there is a possibility of producing inaccurate hydrological design magnitudes. Meanwhile, the L-moment method is a linear combination of Probability Weighted Moment, with the ability to process data concisely and linearly. This study was therefore conducted to discover the L-moment method’s capacity to obtain a regional probability distribution and design rainfall, used as a basis for calculating hydrological planning, in anticipation of disasters. The study location, Mount Merapi, was selected to enable a more accurate prediction of maximum rainfall with the capacity to cause cold lava in the area, and consequently, reduce the risk of loss for people living within close proximity. According to the results, the L-moment regional ratio results were τ2R = 0.203, τ3R = 0.166, and τ4R = 0.169. The homogeneity and heterogeneity tests show all rainfall stations are uniform or homogeneous, and no data were released from the discordance test results. Also, the growth factor value increases in each return period design rainfall prediction. In this study, the suitable regional probability distribution for the research area is the Generalized Logistic distribution with formulated design rainfall equation. Regional design rainfall is able to predict possible rainfall within the area. The Test model showed the minimum RBias = 0.45%, maximum RBias = 41.583%, minimum RRSME = 0.45%, and maximum RRSME = 71.01%. Meanwhile, the L-moment method’s stability was shown by the model test minimum error = 1.64% and maximum error = 16.60%. The higher error value in the higher return period shows L-moment is able to reduce bias data, however, this has limitations in the higher return period.
Pengaruh Penambahan Lumpur Geothermal Dan Serat Baja Ban Bekas Terhadap Beton Devita Mayasari; Tri Yuhanah; Budi Wicaksono
FORUM MEKANIKA Vol 8 No 1 (2019): JURNAL FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (554.171 KB) | DOI: 10.33322/forummekanika.v8i1.341

Abstract

Concrete is a very popular construction material, widely used in construction. The waste that is in the surrounding environment begins to be used for mixed materials in the manufacture of concrete, one of which is geothermal mud (geothermal sludge) which has pozzolanic properties because it contains alumina silica minerals so that it can be used instead of cement. Waste steel fiber tires used residue from vehicles is an added material that can be used to improve the mechanical properties of concrete. This study aims to determine the effect of adding geothermal mud and used steel fiber to concrete. Planned concrete fc '30 MPa with geothermal mud as partial substitution of 20% cement and used tire steel fibers with variations of 0%, 0.5%, 1% and 1.5% of the weight of concrete. Concrete Variation 4 (1.5% used tire steel fiber + 20% geothermal mud) has the highest compressive strength of 32.13 MPa compared to normal concrete of 30.006 MPa. For the splitting tensile strength variation 4 is 1.8 MPa and its flexural strength is 2.457 MPa while the normal concrete is splitting tensile strength of 1.6 MPa and its bending strength is 2.210 MPa.
Pengaruh Air Mengunakan Reclaimed Asphalt Pavement Pada Campuran Beton Aspal Berdasarkan Uji Cantabro Dan Indirect Tensile Strength Tommy Iduwin; Devita Mayasari; Tri Yuhanah
FORUM MEKANIKA Vol 10 No 1 (2021): JURNAL FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/forummekanika.v10i1.1377

Abstract

The impact of RAP on water was identified to be analyzed for the material's resistance to water because there are still a lot of waterlogged pavements in Indonesia. This research uses RAP variation 0%, 25% and 35%. The test is the Marshall test to get the optimum asphalt content value, the Cantabro test to determine the weight loss for 300 rounds and the durability by varying the immersion 0.1, 2, 4 and 7 days which will be tested for ITS. The KAO value obtained for each variation is 5.4% for 0% Rap, 5.6 for 25% Rap and 6% for 35% RAP. The results of the Cantabro test show that the largest percentage of weight loss is a mixture of 35% RAP which is 12.54%, where for 0% RAP there is a weight loss of 10.85% and at 25% RAP there is a weight loss of 11.66%. ITS test results have the highest value with variations of RAP 0%, RAP 25% and RAP 35%. variations of 0%, 25% and 35% showed a decreasing trend until the 7th day of immersion, it can be said that in the three variations the ITS value was influenced by the duration of continuous immersion. Keywords: RAP, AC-WC, Marshall, Cantabro, Indirect Tensile Strength
Sosialisasi dan Edukasi SNI 2052:2017 Tentang Baja Tulangan Beton Di SMKN 4 Tangerang Devita Mayasari
Terang Vol 1 No 2 (2019): TERANG : Jurnal Pengabdian Pada Masyarakat Menerangi Negeri
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/terang.v1i2.437

Abstract

Material baja tulangan beton beton merupakan material yang penting dalam konstruksi beton bertulang. Kemampuan tulangan beton dalam menerima kuat tarik yang tinggi dan kelemahan beton dalam kuat tarik menjadi dasar pembuatan beton bertulang. Setiap negara memiliki standar masing-masing, tak terkecuali Indonesia yang memiliki Standar Nasional Indonesia (SNI). SNI seringkali dilakukan update dalam mengikuti perkembangan ilmu dan pengetahuan terbaru. Pada saat ini standar yang digunakan untuk baja tulangan beton di Indonesia yang terbaru adalah SNI 2502:2017. Namun standar ini belum tersosialisasikan dengan baik karena keterbatasan biaya dan sumber daya. Dengan adanya kegiatan Program Kemitraan Masyarakat dengan tema “Sosialisasi dan Edukasi SNI 2052:2017 Tentang Baja Tulangan Beton Di SMKN 4 Tangerang” mampu memberikan pengetahuan dan pemahaman kepada para guru dan siswa SMKN 4 Tangerang khususnya Jurusan Teknik Sipil Teknik Konstruksi Batu dan Beton.
Edukasi Alat Penjernih Air Sederhana Sebagai Upaya Pemenuhan Kebutuhan Air Bersih Budi Wicaksono; Tommy Iduwin; Devita Mayasari; Pratiwi Setyaning Putri; Tri Yuhanah
Terang Vol 2 No 1 (2019): TERANG : Jurnal Pengabdian Pada Masyarakat Menerangi Negeri
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/terang.v2i1.536

Abstract

Water is source of life on earth. The largest water body is in the ocean at 97 percent and 3 percent remaining is fresh water which is used to support daily needs, so clean water is a basic human need. The limited amount of water and increasing people number caused a clean water crisis. Apart from the amount, the quality of fresh water is getting worse. The struggle to use clean water for various uses and clean water wasteful behavior had resulted in the loss of adequate access of clean water for some people. One of the ways to improve clean water quality and quantity is conducting a water purification process. Water purification can be done using simple tools with filtration techniques. Through the Community Partnership Program’s theme "Education of Simple Water Purification as an Effort to Fulfill Clean Water Needs" able to provide knowledge and understanding to teachers and students of MTs Nurul Qur'an Jakarta as activity partners.
Peningkatan Sistem Sanitasi Melalui Pembangunan Sarana Akses Cuci Tangan Dan Pengelolaan Sampah Serta Edukasi Kebersihan Di Sekolah Madrasah Ibtidaiyah Al Huda Bekasi Devita Mayasari
Terang Vol 3 No 2 (2021): TERANG : Jurnal Pengabdian Pada Masyarakat Menerangi Negeri
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/terang.v3i2.939

Abstract

Sistem sanitasi sekolah menjadi salah satu standar di lingkungan sekolah yang perlu ditingkatkan agar kesehatan dan pendidikan terjamin. Kegiatan peningkatan sistem sanitasi dilakukan dengan cara membangun akses sarana cuci tangan dan melakukan pengelolaan sampah, yaitu memisahkan jenis sampah organik dan anorganik agar sampah organik dapat dijadikan komposter, sedangkan sampah anorganik dapat diolah secara komprehensif. Ketersediaan akses sarana cuci tangan akan mempermudah pembiasaan menjaga kebersihan diri. Pengelolaan sampah yang tidak memenuhi syarat kesehatan dapat mengakibatkan pencemaran dan menimbulkan penyakit. Kegiatan edukasi diberikan kepada siswa-siswi dan guru Sekolah Madrasah Ibtidaiyah Al Huda untuk pembiasaan menjaga kebersihan diri dan lingkungan. Melalui kegiatan Pengabdian Kepada Masyarakat (PKM) dengan tema Peningkatan Sistem Sanitasi Sekolah Melalui Pembangunan Akses Sarana Cuci Tangan dan Pengelolaan Sampah Serta Edukasi Kebersihan di Sekolah Madrasah Ibtidaiyah Al Huda Bekasi mampu meningkatkan kesehatan sekolah dan pengetahuan para guru dan siswa sebagai mitra PKM akan pentingnya menjaga kebersihan. Kata kunci: sanitasi sekolah, sarana cuci tangan, pengelolaan sampah
Analisis Laju Infiltrasi dan Kekuatan Porous Paving Block Substitusi Fly Ash dan Cangkang Kerang Darah Devita Mayasari; Tri Yuhanah; Yulisya Zuriatni
Potensi: Jurnal Sipil Politeknik Vol 24 No 2 (2022): Potensi: Jurnal Sipil Politeknik
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v24i2.4120

Abstract

Pengendalian genangan salah satunya dilakukan dengan mengoptimalkan penyerapan air ke dalam tanah. Porous paving block memiliki nilai porositas tinggi karena memiliki kemampuan meloloskan air yang lebih tinggi. Penelitian ini melakukan pembuatan porus paving block dengan bahan limbah fly ash (FA) substitusi semen dan cangkang kerang darah (CK) sebagai agregat kasar. Perbandingan bahan pembuatan paving block porous 4; 3; 2,5; 2 dan 1,5 dengan semen disubtitusi 30 % FA. Tujuan penelitian ini untuk mengetahui pengaruhnya terhadap kuat tekan pada umur 7, 14, dan 28 hari. Laju infiltrasi porous paving block melalui koefisien permeabilitas diuji pada umur 28 hari. Hasil penelitian menunjukkan kuat tekan porous paving block, yaitu V1 sebesar 14,83 MPa, V2 sebesar 1,5 MPa, V3 sebesar 4,66 MPa, V4 sebesar 4,58 MPa, V5 sebesar 8,75 MPa, V6 sebesar 4,50 MPa. Nilai koefisien permeabilitas rata-rata porous paving block masing-masing V1 = 0,0045 cm/s, V2 = 0,0048 cm/s, V3 = 0,0040 cm/s, V4 = 0,0038 cm/s, V5 = 0,0051 cm/s, V6 = 0,0050 cm/s. Penggunaan perbandingan cangkang kerang darah 1(0,7PC + 0,3FA) : 2 CK mencapai koefisien permeabilitas yang optimum.
TINJAUAN PERMEABILITAS DAN KUAT TEKAN POROUS PAVING BLOCK RAMAH LINGKUNGAN BERBAHAN CAMPURAN LIMBAH PLASTIK DAN SISA PENGOLAHAN BATU MARMER Devita Mayasari; Tri Yuhanah; Pratiwi Putri
Jurnal Teknologi Bahan dan Barang Teknik Vol 11, No 2 (2021)
Publisher : Balai Besar Bahan dan Barang Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37209/jtbbt.v11i2.232

Abstract

Porous paving block mampu meloloskan air lebih banyak karena terdapat rongga di dalamnya. Bahan ramah lingkungan dengan memanfaatkan limbah plastik sebagai substitusi semen dan sisa pengolahan batu marmer sebagai substitusi agregat kasar. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan limbah sampah plastik HDPE dan sisa pengolahan batu marmer terhadap kuat tekan dan permeabilitas porous paving block. Metodologi penelitian dengan memeriksa material yang digunakan sebagai  campuran pada sampel diperiksa parameternya sesuai standar. Variasi HDPE dan pembuangan sisa pengolahan batu marmer yang digunakan dalam pembuatan porous paving block sebesar 20%, 40%, 60%, 80%. Pengujian sampel kuat tekan pada umur 7, 14, 28 hari dan 28 hari pengujian infiltrasi. Hasil penelitian nilai kuat tekan porous paving block dengan komposisi 1 : 4 penggunaan PC dan kerikil (V1) nilainya lebih tinggi yaitu 8,16 MPa dibandingkan penggunaan marmer (V2) 5,91 MPa. Jika PC diganti dengan HDPE (V3) maka nilai kuat tekannya sebesar 1,08 MPa. Penggunaan komposisi HDPE (V7) lebih banyak meningkatkan kuat tekan dibandingkan lebih banyak komposisi batu marmer karena pengerasan HDPE menutupi permukaan marmer sehingga menambah kekerasan. Permeabilitas melalui uji infiltrasi porous paving block tertinggi pada V1 0,83 cm/s dan terendah V7 0,1 cm/s. Infiltrasi mengalami penurunan seiring dengan penambahan kadar plastik yang digunakan karena semakin banyak lelehan plastik yang menutupi pori porous paving block.
Co-Authors Budi Wicaksono Pratiwi Putri Pratiwi Setyaning Putri Pratiwi Setyaning Putri Tommy Iduwin Tri Yuhanah Tri Yuhanah Yulisya Zuriatni