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Analisis Tingkat Kepadatan dan Nilai CBR Tanah Dasar Ekspansif yang Distabilisasi dengan Campuran Gypsum Ferdyawan, M. Crevill; Sri Utami, Gati; Wardani, Mila Kusuma; Syafiarti, Arintha Indah Dwi; F, Dita Kamarul; L, Laras Laila
Prosiding Seminar Nasional Sains dan Teknologi Terapan 2024: Menjembatani Energi Berkelanjutan dan Ekonomi Hijau melalui Transformasi Riset dan Teknologi T
Publisher : Institut Teknologi Adhi Tama Surabaya

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Abstract

Tanah ekspansif merupakan tanah lempung yang mempunyai  level plastisitas yang tinggi, potensi kembang susut  tinggi dengan adanya pergantian musim, sehingga sebelum digunakan sebagai tanah dasar di diperlukan stablilisasi  untuk menurunkan nilai Indeks Plastisitas dan menaikkan daya dukung. Stabilisasi  adalah cara untuk merubah dan memperbaiki sifat-sifat tanah agar memenuhi persyaratan sebagai tanah dasar. Tanah di daerah Pakuwon, Surabaya Barat memiliki jenis tanah ekspansif, sehingga bangunan sipil terutama jalan mengalami kerusakan walaupun volume lalu lintas rendah. Pada penelitian ini akan dilakukan analisis tingkat kepadatan dan nilai CBR tanah ekspansif yang distabilisasi menggunakan campuran gypsum dengan prosentase campuran gypsum 9%, 14%, dan 19% dan waktu pemeraman 5, 10 dan 15 hari.  Hasil  yang diperoleh dari penelitian ini dapat disimpulkan sebagai berikut, karakteristik tanah asli termasuk tanah berbutir halus, plastisitas tinggi, tingkat kepadatan sedang dan  nilai CBR rendah. Karakteristik tanah lempung setelah distabilisasi menurut hasil uji atterberg limit memiliki nilai liquid limit 34,52%, indeks plastisitas sebesar 12,4%, termasuk katagori cukup baik. Prosentase dan pemeraman terbaik pada campuran gypsum 19% pada pemeraman 15 hari, tanah dalam kondisi paling padat 1,672 gr/cm³ dan nilai CBR terbesar 7,4% termasuk katagori cukup baik.
Evaluation of Bozem and Drainage Channels of Jade Hamlet Residential in Gresik Caroline, Jenny; Syafiarti, Arintha Indah Dwi
Journal of Civil Engineering, Planning and Design Vol 1, No 2 (2022): November
Publisher : Faculty of Civil Engeneering and Planning - ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jcepd.2022.v1i2.3760

Abstract

Drainage refers to a vital component for water disposal so that a region or area can hinder potential puddle due to excessive water on the land surface. Therefore, a good plan adjusting the land condition of residential area belongs to a fundamental matter. Jade Hamlet Residence is located on Hulaan highway, Hulaan Urban Village, Menganti District, Gresik Regency, covering an area ±20 hectares and consisting of housing area, park, public facility, and catchment area. The drainage channel at this residence serves as the drainage for rain water and household dirty water disposal. During the rainy season in 2018 and 2019, the channel and bozem or drainage basin of this residence encountered overflowing and eventually caused puddle. To overcome this problem, the capacities of bozem and channel are in need of analysis and evaluation so as to figure out the runoff volume that can be accommodated in the bozem and investigate the discharge planned in the drainage channel by employing Log Person III method, chi-square distribution fit test, Kolmogorov-Smirnov test, rational formula, and exponential method. The results of analysis and evaluation demonstrated that the bozem capacity could not afford the runoff discharge (298.35 m3 309.55 m3), thereby demanding additional length and depth against the existing bozem. Meanwhile, the calculation of flood discharge planned for the drainage channels of S4.Ry3, S6.Ry1, S6.D1, S6.I2, S6.Cs1, S6.Rc1, S6.Rc2 indicate that they need redesigning by altering the channel dimension as the discharge capacity exceeds the channel.
The Effect of Using Styrofoam As Additional Material For Asphalt Concrete Layer (Laston) – WC With BNA BLE Syafiarti, Arintha Indah Dwi; Aslim, Fadlil Jalil; Utami, Gati Sri; Sekartadji, Ratih
Jurnal IPTEK Vol 26, No 1 (2022)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2022.v26i1.2433

Abstract

Asphalt concrete layer (laston) has a high degree of flexibility so that placing it directly on top of layers such as AC-WC (Asphalt Concrete – Wearing Course) makes this layer vulnerable to damage due to high temperatures and heavy traffic loads. The type of damage that often occurs in the laston is the release of granules and cracks. Styrofoam is a type of plastic polymer that is thermoplastic when heated it becomes soft and hardens when cold. When mixed with gasoline, styrofoam will soften and can function as an adhesive. This study was to determine the value of Marshall characteristics in the addition of styrofoam into the asphalt.variations used for styrofoam content are 1%, 1.5%, 2% with asphalt content of 4.5%, 5.0%, 5.5%, 6.0%. The results showed that the optimum asphalt value was obtained at 6% asphalt content. And the mixture that meets the requirements is the addition of 1% styrofoam. Higher content of styrofoam will reduce the value of the melt (flow) and will reduce the value of Marshall stability.