Pengaruh Penggunaan Semen Sebagai Bahan Stabilisasi Tanah Lempung Pada Proyek Pembangunan Sarana Limbah Di Pantai Utara Lamongan

Zahira, Arafa (2021) Pengaruh Penggunaan Semen Sebagai Bahan Stabilisasi Tanah Lempung Pada Proyek Pembangunan Sarana Limbah Di Pantai Utara Lamongan. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Tanah merupakan bagian terpenting dalam menerima dan menahan seluruh beban struktur bangunan. Mayoritas tanah di Indonesia khususnya pada Proyek Pembangunan Sarana Limbah di Pantai Utara Lamongan mempunyai sifat lekatan antar butiran (tanah lempung) yang tinggi dengan karateristik daya dukung rendah dan kembang susut tinggi, sehingga perlu dilakukan stabilisasi tanah. Stabilisasi tanah dilakukan dengan metode pencampuran tanah lempung dan bahan kimia berupa semen untuk menghasilkan senyawa baru yang bersifat lebih stabil dari kondisi tanah asli. Pencampuran ini dilakukan dengan persentase semen terhadap tanah asli yaitu 3%, 5%, 7%, dan 10%. Pengujian meliputi sifat fisik, mekanik, kimiawi dan mikropori. Hasil pengujian diambil persentase optimum yaitu 10% didapatkan sifat fisik dan mekanik berupa Berat Volume Tanah (γt) cenderung meningkat sebesar 0.39%, Kadar Air (Wc) cenderung menurun sebesar 16.05%, Spesifik Gravity (Gs) cenderung meningkat sebesar 3.69%, Angka Pori (e) cenderung menurun sebesar 0.92%, Indeks Plastisitas (IP) cenderung menurun sebesar 35.16%, Kadar Air Optimum (KAO) cenderung menurun sebesar 24.19%, Berat Volume Kering maksimum (γd maks) cenderung meningkat sebesar 3.80%, Nilai CBR cenderung meningkat sebesar 96.46%, dan Kuat Tekan (qu) cenderung meningkat sebesar 94.62% dari tanah inisal. Sedangkan sifat kimiawi pada pengujian XRD didapatkan adanya mineral baru Titanomagnetite. Dimana Titanomagnetite adalah mineral yang mengandung oksida dari titanium dan besi yang memiliki karakteristik tidak dominan pada komposisi semen dan tanah di daerah pantai, serta pada mikropori tanah pengujian SEM didapatkan semakin banyak penambahan kadar semen maka semakin rapat pula pori antar partikel tanah ditunjukkan dengan berkurangnya rongga berwarna hitam. Sehingga penambahan semen sangat efektif digunakan sebagai bahan stabilisasi pada tanah lempung dimana dapat meningkatkan sifat fisik, mekanik, kimiawi dan mikropori. ====================================================================================================== Soil is the most important part of receiving and holding the entire load of the building structure. Most soils in Indonesia, especially in the Waste Facility Development Project on the North Coast of Lamongan, have high intergranular adhesion properties (clay soil) with low bearing capacity characteristics and high expansion and shrinkage, so soil stabilization is needed. Soil stabilization is done by mixing clay and chemicals in the form of cement to produce new compounds that are more stable than the original soil conditions. This mixing is done with the percentage of cement to the original soil, namely 3%, 5%, 7%, and 10%. Tests include physical, mechanical, chemical, and microporous properties. The results of the test-taking the optimum percentage of 10% obtained physical and mechanical properties in the form of Soil Volume Weight (γt) tended to increase by 0.39%, Water Content (Wc) tended to decrease by 16.05%, Specific Gravity (Gs) tended to increase by 3, 69%, Pore Number (e) tends to decrease by 0.92%, Plasticity Index (IP) tends to decrease by 35.16%, Optimum Moisture Content (KAO) tends to decrease by 24.19%, Maximum Dry Volume Weight (γd max ) tends to increase by 3.80%, the CBR value tends to increase by 96.46%, and the Compressive Strength (qu) tends to increase by 94.62% from the initial soil. While the chemical properties of XRD testing is the presence of a new mineral Titanomagnetite. Where Titanomagnetite is a mineral containing oxides of titanium and iron which has no dominant characteristics in the composition of cement and soil in coastal areas. The SEM test as well as in soil micropores showed that the more cement content was added, the denser the pores between the soil particles as indicated by the reduction in black voids. So that the addition of cement is very effective as a stabilizer in clay soils that can improve physical, mechanical, chemical, and microporous properties.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Tanah lempung, Stabilisasi tanah, Semen, CBR, UCT, XRD, SEM Clay soil, Soil stabilization, Cement
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TA Engineering (General). Civil engineering (General) > TA749 Soil stabilization
Divisions: Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User: Arafa Zahira
Date Deposited: 26 Aug 2021 08:16
Last Modified: 26 Aug 2021 08:16
URI: https://repository.its.ac.id/id/eprint/89930

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