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All Journal JURNAL MEDIA TEKNIK Jurnal Deformasi Simposium II UNIID 2017 SIKLUS: Jurnal Teknik Sipil JUTEKS - Jurnal Teknik Sipil CANTILEVER GERVASI: Jurnal Pengabdian kepada Masyarakat TEKNIKA Bearing : Jurnal Penelitian dan Kajian Teknik Sipil Inersia : Jurnal Teknik Sipil Jurnal Pengabdian kepada Masyarakat Abditeknika - Jurnal Pengabdian Kepada Masyarakat Jurnal PkM (Pengabdian kepada Masyarakat) Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Kemas Journal:Jurnal Pengabdian masyarakat
Reffanda Kurniawan, Reffanda
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Journal : CANTILEVER

 1 
ANALISIS PENGARUH CAMPURAN PUPUK UREA TERHADAP KUAT GESER TANAH LEMPUNG LUNAK DENGAN UJI TRIAXIAL Sutejo, Yulindasari; Dewi, Ratna; Haryadi, Dwi; Kurniawan, Reffanda
CANTILEVER Vol 4, No 1 (2015): Cantilever
Publisher : Jurusan Teknik Sipil & Perencanaan Fakultas Teknik Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (567.403 KB)

Abstract

The soil plays an important role in a construction site. One type is the soft clay soil that has a value compressibility and high water levels so low soil shear strength that reduce the bearing capacity of the soil. In this study conducted by the method of soil improvement, soil stabilization using a mixture of urea fertilizer with percentage of 5 %, 10 %, and 15 % with a treatment period of 3 , 7, and 14 days with Triaxial test. Soft clay soil samples taken in the area around UNSRI, Inderalaya, OI, South Sumatra. The test results of soil properties, w 35.20 %; 2.53 Gs; PL 21.14 %; LL 42 % and IP 20.86 %. According to the USCS, the soil categorized CL, while according to AASHTO, the soil is categorized class A-7-6. Results of Triaxial testing , the value of cohesion (c) 5 % maximum on the addition of urea fertilizer (14 days) is 1.138 kg /cm2 . While the value of shear angle (f) and shear strength (τ) maximum on the addition of 15 % urea fertilizer (3 days) of 26,42o and 3.93 kg /cm2 .Key Words : Urea Fertilizer, Shear Strength, Triaxial, Soft Clay
PENGARUH LIMBAH PLAFON GIPSUM TERHADAP PENURUNAN KONSOLIDASI PADA TANAH LEMPUNG EKSPANSIF Dewi, Ratna; Sutejo, Yulindasari; Rahmadini, Rizki; Arfan, Muhammad; Rustam, Reffanda Kurniawan
CANTILEVER Vol 8, No 1 (2019): Cantilever
Publisher : Jurusan Teknik Sipil dan Perencanaan Fakultas Teknik Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (515.959 KB) | DOI: 10.35139/cantilever.v8i1.78

Abstract

Expansive clay has a high potential to swell if compared to other types of clay.  Expansive clay also has very low bearing capacity so that a method of soil improvement was needed to improve the soil.  This type of soil can be found in Gasing village, Tanjung Api-Api Km.  11 Banyuasin regency of South Sumatra Province.  This research aims to study the mixture of gypsum plafond waste as additives in the process of stabilizing expansive soil clay.  It can be made according to the needs of the mixture.  In this study, the percentage of mixture of gypsum plafond waste are 5 %, 10 % and 15%.  The test used an Oedometer (SNI 2812: 2011/ASTM D2435) equipment.  By giving the pressure of 2.5 kN/m2; 5 kN/m2; 10 kN/m2; 20 kN/m2; and 40 kN/m2.  The test results of the clay without mixture with gypsum plafond obtained were liquid limit value (LL) = 67%, plastic limit (PL) = 26.38% and plastic index value (PI) of 40.62%.  Spesific Gravity (Gs) = 2.696, optimal water content (wopt) = 21.55 % and optimal dry weight (wopt) = 1.55 gr/cm3.  Therefore, the soil sample was an expansive clay type and classified as A-7-6 (AASHTO classification).  Consolidated test results show that soil compression index (Cc) = 0.190.  After mixed with gypsum plafond waste of 15 %, the compression index value (cc) = 0.080.  This indicates that the compression index value (cc) has decreased.  Based on the above, it can be concluded that the mixture of gypsum waste in expansive clay causes soil settlement.
Co-Authors Adhitya, Bimo Brata Adiguna Adiguna, Adiguna Adiguna, Adiguna Aliyan Saputra Jaya Alzahri, Syahril Amiwarti, Amiwarti Arima Sefta Budi Ariawan Citra Indriyanti Dewi, Ratna Dwi Wahyuni Fathoni Usman Febrian Hadinata Firdaus, Muhammad Gustianto, Ade Haryadi, Dwi Herri Purwanto M Firdaus M. Firdaus Muhammad Firdaus Nasution, Ali Napiah Rachardi, Rachardi Rahmadini, Rizki Ratna Dewi Ratna Dewi Ratna Dewi Ridhuan Andika Sahadi, Wiran Sari, Ronita Setiobudi, Agus Sutanto Muliawan Syahril Alzahri, Syahril Syarif Hidayat Taufik Muda Usman, Fathoni warti, Ami Yulindasari Sutejo, Yulindasari