PENGARUH PENAMBAHAN LIMBAH ABU CANGKANG SAWIT (POFA) TERHADAP NILAI CALIFORNIA BEARING RATIO (CBR) UNTUK STABILISASI TANAH LEMPUNG
Abstract
Clay soils are considered to be soils with low bearing capacity. To improve soil conditions, soil stabilization techniques can be applied. One of the soil stabilization techniques is to mix the Palm Oil Fuel Ash (POFA) in clay soil. This study aims to determine the effect of mixing POFA in clay soil on the California Bearing Ratio (CBR) value. The proportions of POFA mixture in the clay soil used were 5%, 10% and 15%. Soils are classified according to the AASHTO classification system. The results of the sieve analysis showed that the percentage of soil that passed sieve number 200 was 70.875% (included in the silt to clay soil group). With a Liquid Limit (LL) value of 34.08% and a Plasticity Index (PI) value of 13.496%, the soil is classified as A-6 which is a clay group with moderate to poor subgrade quality.Based on the results of laboratory CBR testing, it is known that the addition of POFA to clay soil can affect the CBR value. The CBR value increased with the addition of POFA by 5% to 10%. However, there was a decrease in CBR value in the proportion of adding 15% of POFA. The proportion of POFA mixture on clay which gave the highest CBR value was 10%. In this composition the CBR value increased 476,648% from the CBR of the original clay.
Downloads
References
Budi, G.S., 2011, Pengujian Tanah di Laboratorium (edisi pertama), Graha Ilmu, Yogyakarta.
Darwis, 2017, Dasar-dasar Teknik Perbaikan Tanah, Pustaka AQ, Yogyakarta.
Hardiyatmo, H.C., 2012, Mekanika Tanah 1 (edisi keenam), Gajah Mada University Press, Yogyakarta.
Kusuma, R.I., dkk, 2015, Stabilisasi Tanah Lempung Dengan Menggunakan Abu Sawit Terhadap NillaiKuat TekanBebas (StudiKasus Jalan Desa Cibeulah, Pandeglang), Jurnal Fondasi, Volume 4 Halaman 69-80.
Marlina, Fahriani, F., Apriyanti, Y., 2020. Utilization of palm kernel shell ash as stabilization materials for clay to settlement consolidation. In: IOP Conf. Series: Earth and Environmental Science 599. doi:10.1088/1755-1315/599/1/012040
Panjaitan, S.R.N., 2014. Pengaruh Perendaman Terhadap Nilai CBR Tanah Mengembang yang Distabilisasi Dengan Abu Cangkang Sawit, Jurnal Teknik Sipil. 28: 14-21.
Refi, A dan Elvanisa, 2016. Pengaruh Variasi Abu Cangkang Sawit Terhadap Kembang Susut Tanah Lempung. Jurnal Teknik Sipil ITP. 3: 1-10.
Sarifah, J., dan Pasabiru, B., 2017. Pengaruh Penggunaan Abu Cangkang Kelapa Sawit Guna Meningkatkan Stabilitas Tanah Lempung. Buletin Utama Teknik. 13: 55-61.
SNI 1743:2008, Cara Uji Kepadatan Berat Untuk Tanah, Badan Standarisasi Nasional, Jakarta.
SNI1744:2012, Metode Uji CBR Laboratorium, Badan Standarisasi Nasional, Jakarta.
SNI 1964:2008, Cara Uji BeratJenis Tanah, Badan Standarisasi Nasional, Jakarta.
SNI 1965:2008, Cara Uji Penentuan Kadar Air Untuk Tanah dan Batuan di Laboratorium, Badan Standarisasi Nasional, Jakarta.
SNI 1966:2008, Cara Uji Penentuan Batas Plastis dan Indeks Plastisitas Tanah, Badan Standarisasi Nasional, Jakarta.
SNI 1967:2008, Cara Uji Penentuan Batas Cair Tanah, Badan Standarisasi Nasional, Jakarta.
SNI 3423:2008, Cara Uji Analisis Ukuran Butir Tanah, Badan Standarisasi Nasional, Jakarta.
Sukirman, S., 1995. Perkerasan Lentur Jalan Raya, Nova, Bandung.
Wesley, L.D., 2012. Mekanika Tanah Untuk Tanah Endapan dan Residu (edisi pertama), Andi, Yogyakarta.
Yuliana, Rizqi, 2013, Karakteristik Fisis dan Mekanis Abu Sawit (palm oil fuel ash) dalam Geoteknik, Fakultas Teknik, Universitas Riau, Riau.
Copyright (c) 2021 Yayuk Apriyanti, Hidayatussa'diah Hidayatussa'diah, Ferra Fahriani
This work is licensed under a Creative Commons Attribution 4.0 International License.