Analisis Pengaruh Garam (NACL) sebagai Bahan Stabilisasi pada Tanah Lempung Ekspansif Terhadap Kuat Tekan Gembung dan CBR

Sibarani, Yerusariel Diandora (2017) Analisis Pengaruh Garam (NACL) sebagai Bahan Stabilisasi pada Tanah Lempung Ekspansif Terhadap Kuat Tekan Gembung dan CBR. S1 thesis, Universitas Kristen Indonesia.

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Abstract

Tingginya tingkat pertumbuhan penduduk di Indonesia menyebabkan meningkatnya penyediaan lahan untuk lokasi pembangunan. Kondisi tanah di Indonesia sangat beragam, salah satu persoalan yang sering ditemui dalam mendirikan suatu konstruksi yaitu tanah memiliki daya dukung kecil terutama pada tanah ekspansif karena memiliki sifat mengembang dan menyusut yang tinggi. Untuk itu diadakan penelitian dengan menggunakan garam (NaCl) sebagai bahan stabilisasi yang diharapkan dapat mengurangi potensi kembang susut tanah lempung dengan dilakukan uji Swelling dan uji CBR. Sampel tanah ekspansif diambil langsung dari daerah Lippo Cikarang, sedangkan sampel garam (NaCl) yang digunakan adalah garam dapur. Pencampuran larutan garam sebesar 50% (seperti pada penelitian terdahulu) dari kadar air yang digunakan dalam pengujian Swelling dan CBR, didapatkan hasil bahwa potensi kembang susut tanah berkurang hingga ±50%. Hal ini membuktikan bahwa garam (NaCl) memiliki pengaruh dalam mengurangi besarnya penggembungan pada tanah lempung ekspansif. Kata kunci : larutan garam (NaCl), stabilisasi, tanah lempung ekspansif, tekan gembung, regangan, California Bearing Ratio. / The high rate of population growth in Indonesia has resulted in increased supply of land for construction sites. Soil conditions in Indonesia are very diverse, one of the problems that are often encountered in establishing a construction that is the soil has a small carrying capacity, especially on expansive soil because it has a high expanding and shrinking properties For that reason, research is conducted by using salt (NaCl) as stabilization material which is expected to reduce the potential of shell clay soil development by using Swelling test and CBR test. The expansive soil sample is taken directly from the Lippo Cikarang area, while the salt sample (NaCl) used is kitchen salt. Mixing of 50% salt solution (as in the previous study) of the moisture content used in the Swelling and CBR testing, the result that the soil shrinkage potential decreased to ± 50%. It is evident that salt (NaCl) has an effect in reducing the amount of swelling on expansive clay soil. Keywords: salt solution (NaCl), stabilization, expansive clay of soil, swelling, strain, California Bearing Ratio.

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