Pemanfaantan Bubuk Arang Kayu Terhadap Stabilitas Tanah Lempung di Dusun Jatiluhur, Banyuwangi

The type of soil in Glagah Agung Village, Purwoharjo District, Banyuwangi Regency, is a type of clay soil with a plasticity index value of 42.99. Based on Expansive Land Management for Road Construction by Departemen Pekerjaan Umum Pd T-10-2005-B, it is classified as soil with a high swelling level. So that it can be categorized into soils with high Swelling and shrinkage. The soil improvement method using wood charcoal powder stabilizer was chosen because it can improve water and air circulation in the soil. This study used the addition of wood charcoal powder percentage of 0%, 6%, 8%, 10%, 12%, 14%. The research was conducted on the original soil and stabilized soil specimens, to test their physical properties. The soil physical properties test included water content, specific gravity, atterberg limit, proctor, submerged and unsubmerged CBR. Based on the results of the non-submerged CBR test, the CBR value increased along with the addition of the percentage of wood charcoal powder as a stabilizer. Where the highest CBR value is at the percentage of 14% stabilizers, which is 16.956%. Based on the results of the submerged CBR test, the CBR value decreased at 10% satbilisator percentage and then increased to 14% satbilisator percentage. The highest swelling rate occurred in soil stabilized with 10% wood charcoal powder, which was 0.306.  Jenis tanah pada Desa Glagah Agung, Kecamatan Purwoharjo, Kabupaten Banyuwangi, merupakan jenis tanah lempung dengan nilai indeks plastisitas sebesar 42,99. Berdasarkan Penanganan Tanah Ekspansif untuk Konstruksi Jalan oleh Departemen Pekerjaan Umum Pd T-10-2005-B, digolongkan tanah dengan tingkat pengembangan tinggi. Sehingga dapat dikategorikan kedalam tanah dengan potensi kembang susut tinggi. Metode perbaikan tanah dengan menggunakan bahan stabilisator bubuk arang kayu dipilih karena dapat memperbaiki sirkulasi air dan udara dalam tanah. Penelitian ini menggunakan penambahan persentase bubuk arang kayu sebesar 0%, 6%, 8%, 10%, 12%, 14%. Penelitian dilakukan terhadap benda uji tanah asli dan tanah yang telah distabilisasi, untuk di uji sifat fisiknya. Uji sifat fisik tanah yang dilakukan meliputi kadar air, berat jenis, batas atterberg, proctor, CBR terendam dan tak terendam. Berdasarkan hasil pengujian CBR tak terendam, nilai CBR mengalami kenaikan seiring dengan penambahan presentase bubuk arang kayu sebagai satblisator. Dimana nilai CBR tertinggi pada presentase stabilisator 14%, yaitu sebesar 16.956%. Berdasarkan hasil pengujian CBR terendam, nilai CBR mengalami penurunan pada presentase satbilisator 10% kemudian naik pada presentase satbilisator 14%. Tingkat pengembangan (Swelling) tertinggi terjadi pada tanah yang distabilisator dengan 10% bubuk arang kayu, yaitu sebesar 0.306. &nbsp