Project’s Detail

STABILITAS TANAH LEMPUNG DENGAN PENAMBAHAN ABU CANGKANG KELAPA SAWIT

Abstrak (Abstracts)

Soil has an important role in a construction work, clay soils are often found in construction work in the field. Clay soil expands when the pores are filled with water and will shrink in dry conditions. This is very dangerous because the soil becomes unstable. The carrying capacity of clay soil can be increased if the technical properties of the less favorable clay soil are improved by mixing the clay with chemicals. Therefore, a study was conducted on the clay taken from Jl. Kariangau Km. 5 copies to Km.13, Graha Indah Village, North Balikpapan District, Balikpapan Kaltim, by adding oil palm shell ash as stabilization material. The percentage of adding oil palm shell ash is 5%, 10%, 15%, 20%, 25%. In this study the soil was classified by the USCS classification system, so the soil was CH group with a presentation that passed the No. 200 of 55%, water content at first = 31.6%, Liquid Limit (LL) = 57.28%, Plastic Limit (PL) = 29.23%, Plastic Index (PI) = 28.05%, optimum water content = 16.2%, maximum γd = 1.54 gr / cm3, CBR = 1.18%. With the addition of oil palm shell ash, the Liquid Limit (LL) value (LL) = 50.3%, the Plastic Limit (PL) value (PL) = 36.4%, the Plastic Index (PI) value = 13.9%. Meanwhile, the optimum water content = 15.62%, maximum γd = 1.36 gr / cm3, CBR = 16.7%. So it can be concluded that the addition of oil palm shell ash can improve soil bearing capacity and make soil conditions better. Tanah mempunyai peranan penting dalam suatu pekerjaan konstruksi, tanah lempung sering dijumpai dalam pekerjaan konstruksi dilapangan. Tanah lempung memiliki sifat mengembang apabila pori terisi air dan akan menyusut dalam kondisi kering. Hal ini sangat berbahaya karena tanah menjadi tidak stabil. Daya dukung tanah lempung dapat bertambah apabila diperbaiki sifat-sifat teknis dari tanah lempung yang kurang menguntungkan dengan mencampur tanah lempung dengan bahan kimia. Oleh karena itu diadakan penelitian pada tanah lempung yang diambil dari Jl. Kariangau Km. 5 tembusan Km.13, Kelurahan Graha Indah, Kecamatan Balikpapan Utara, Balikpapan Kaltim, dengan cara menambahkan abu cangkang kelapa sawit sebagai bahan stabilisasi. Persentase penambahan abu cangkang kelapa sawit 5%, 10%, 15%, 20%, 25%. Dalam penelitian ini tanah diklasifikasikan dengan sistem klasifikasi USCS maka tanah tersebut kelompok CH dengan presentasi lolos saringan No. 200 sebesar 55%, kadar air mula-mula = 31,6%, Batas Cair (LL) = 57.28%, Batas Plastis (PL) =29.23%, Indeks Plastis (PI) = 28.05%, kadar air optimum = 16,2%, γd maksimum = 1,54 gr/cm3, CBR = 1,18%. Dengan penambahan abu cangkang kelapa sawit didapat nilai Batas Cair (LL) = 50,3%, nilai Batas Plastis (PL) = 36.4%, nilai Indeks Plastis (PI) = 13.9%. Sedangakan, kadar air optimum = 15,62%, γd maksimum = 1,36 gr/cm3, CBR = 16,7%. Maka dapat disimpulkan dengan penambahan abu cangkang kelapa sawit dapat memperbaiki daya dukung tanah dan membuat kondisi tanah menjadi lebih baik.

Keyword : Soil, Oil Palm Shell Ash, Stability

Nilai Properti

Penulis : ERPI ARBINA, NIM : 922017040, Penerbit : Politeknik Negeri Balikpapan, Program Studi : TEKNIK SIPIL, Tahun : 2020, Bahasa : Indonesia, Jenis Penelitian : Tugas Akhir, Lokasi : Prepustakaan Poltekba,

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