PENGARUH PENAMBAHAN KAPUR TERHADAP PENINGKATAN KUAT GESER TANAH LEMPUNG

Sitompul, Syaputri (2017) PENGARUH PENAMBAHAN KAPUR TERHADAP PENINGKATAN KUAT GESER TANAH LEMPUNG. Diploma thesis, UNIMED.

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3. 5133210040 ABSTRAK.pdf - Published Version

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Abstract

Tujuan Penelitian ini untuk mengetahui pengaruh penambahan kapur terhadap peningkatan kuat geser tanah lempung dengan melakukan uji sifat fisik dan sifat mekanik tanah tersebut. Tanah lempung ini diambil dari daerah Tarutung Sibolga Km.11 tepatnya di Desa Banuaji II, Kecamatan Adiankoting, Tapanuli Utara yang memiliki tanah yang kurang baik untuk digunakan sebagai tanah dasar dalam pondasi jalan raya. Ini terlihat pada subgrade jalan yang pecah dan bergelombang. Hal ini disebabkan karna tanah lempung memiliki sensitivitas yang tinggi terhadap perubahan kadar air, sehingga menyebabkan kuat geser tanah tersebut rendah. Upaya yang dilakukan untuk mengatasi permasalahan yang disebabkan oleh tanah lempung yaitu dengan meningkatkan daya dukung dan kuat geser tanah. Untuk itu perlu dilakukan perbaikan tanah dengan penambahan kapur. Kapur merupakan salah satu material yang cukup efektif dalam perbaikan tanah. Efektivitas perbaikan tanah lempung dengan penambahan kapur dapat dilihat dari sifat fisik dan sifat mekanik tanah tersebut. Uji sifat fisik antara lain batas cair, batas plastis, batas susut. Sedangkan sifat mekanik salah satunya uji kekuatan geser langsung. Untuk mengetahui pengaruh pencampuran tanah lempung dengan kapur maka dilakukan dengan cara membuat variasi pencampuran kapur sebesar 0%, 5%, 10%, 15% dan 20%. Hasil penelitian uji sifat fisik didapat nilai maksimum dengan pencampuran kapur 20% yaitu diantaranya penurunan batas cair sebesar 30%, kenaikan batas plastis 26,47%, dan kenaikan batas susut 36,04%, sehingga didapat penurunan indeks plastisitasnya sebesar 3,52%. Sedangkan hasil uji mekanik diantaranya penambahan 5% kapur nilai kohesi dan sudut geser masing – masing sebesar 1,28 kg/cm2 dan 37,950, meningkat menjadi 1,44 kg/cm2 dan 63,770 pada pencampuran kapur 20%. Berdasarkan hasil penelitian menunjukkan penambahan kapur, dapat memperbaiki sifat fisis dan mekanis tanah diantaranya dapat menurunkan plastisitas tanah dan meningkatkan nilai sudut geser dalam serta nilai kohesi.

Item Type: Thesis (Diploma)
Contributors:
ContributionNameNIDN/NIDK
Thesis advisorPanjaitan, Nahesson H.197205272002121002
Call Number: SK-2017 SIP 008
Keywords: Tanah lempung; Kapur; Kuat geser tanah
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction. Mechanics of materials
T Technology > TA Engineering (General). Civil engineering (General) > TA630 Structural engineering (General)
Divisions: Fakultas Teknik > D3 Teknik Sipil
Depositing User: Mrs Siti Nurbaidah
Date Deposited: 01 Mar 2017 02:54
URI: http://digilib.unimed.ac.id/id/eprint/23383

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