CAHYANI, FADHILA PUTRI (2024) PENGARUH PENGGUNAAN GEOPOLIMER BERBASIS GROUND GRANULATE BLAST FURNANCE SLAG (GGBFS) PADA STABILISASI TANAH TERHADAP NILAI KUAT TEKAN BEBAS (Studi Kasus: Jl. Raya Kubang Laban, Desa Terate, Kecamatan Kramawatu, Kabupaten Serang, Banten). S1 thesis, Fakultas Teknik Universitas Sultan Ageng Tirtayasa.

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Abstract

Soils have different specifications for each type, so there are different ways to handle them either mechanically or chemically. Clay is a type of soil that has high plasticity, low bearing capacity and high shrinkage. This results in the instability of any building erected on clay soil, due to the adverse and unpredictable characteristics of the soil. The purpose of this study is to determine the classification and physical properties of soil and to determine the effect of geopolymer based on ground granulate blast furnace slag (GGBFS) as an additive on soil characteristics and free compressive strength values. To obtain the free compressive strength value, soil characteristics testing and free compressive strength testing were carried out using the Unconfined Compression Tester (UCT) tool. The test specimens used are soil samples added with geopolymers with GGBFS raw materials and alkaline activators (Na2SiO3 and NaOH). Where the NaOH concentration is 10 M with a solution ratio of 2.0 (Na2SiO3 to NaOH), variation of GGBFS content of 0% and 20%, and variation of S/L (GGBFS to activator) of 1/2 and 1/2.5. The curing of the test specimens was carried out for 0, 7, 14, and 28 days. Based on the research that has been done, the results show that the soil used in the research is included in the OH soil classification (organic clay with medium to high plasticity) with an IP of 20.18%. The effect of GGBFS-based geopolymers on the plastic index value is a decrease in the IP value in the addition of alkaline activators, the IP value in variation B (80% soil, 20% GGBFS, S/L 1/2) is 10.68% and variation C (80% soil, 20% GGBFS, S/L 1/2.5) is 9.84%. In the free compressive strength test, the effect of GGBFS-based geopolymer can increase the free compressive strength value at 28 days curing time with qu values of 29.384 kg/cm2 for variation C (80% Soil, 20% GGBFS, S/L 1/2.5) and 18.574 kg/cm2 for variation B (80% Soil, 20% GGBFS, S/L 1/2) when compared to Variation A (Original soil) of 1.590 kg/cm2.

Item Type:	Thesis (S1)
Contributors:	Contribution Contributors NIP/NIM Thesis advisor KUSUMA, RAMA INDERA 198108222006041001 Thesis advisor FATHONAH, WOELANDARI 199012292019032021
Additional Information:	Tanah memiliki spesifikasi yang berbeda-beda pada setiap jenisnya, sehingga berbeda-beda pula cara penangan yang diberikan baik secara mekanis atau kimia. Tanah lempung merupakan jenis tanah yang memiliki plastisitas tinggi, daya dukung rendah dan kembang susut tinggi. Hal tersebut mengakibatkan ketidak stabilan pada setiap bangunan yang didirikan diatas tanah lempung, karena karakteristik tanah yang merugikan dan tidak dapat diprediksi. Tujuan dari penelitian ini yaitu untuk mengetahui klasifikasi dan sifat fisik tanah serta mengetahui pengaruh geopolimer berbasis ground granulate blast furnace slag (GGBFS) sebagai bahan tambah terhadap karakteristik tanah dan nilai kuat tekan bebas. Untuk mendapatkan nilai kuat tekan bebas, dilakukan pengujian karakteristik tanah dan pengujian kuat tekan bebas dengan menggunakan alat Unconfined Compression Tester (UCT). Benda uji yang digunakan yaitu sampel tanah yang ditambahkan dengan geopolimer dengan bahan baku GGBFS serta aktivator alkali (Na2SiO3 dan NaOH). Dimana konsentrasi NaOH 10 M dengan rasio larutan 2,0 (Na2SiO3 terhadap NaOH), variasi kadar GGBFS sebesar 0% dan 20%, serta variasi kadar S/L (GGBFS terhadap aktivator) sebesar 1/2 dan 1/2,5. Pemeraman benda uji dilakukan dengan waktu 0, 7, 14, dan 28 hari. Berdasarkan penelitian yang telah dilakukan, didapat hasil bahwa tanah yang dipakai pada penelitian masuk kedalam klasifikasi tanah OH (lempung organik dengan plastisitas sedang sampai tinggi) dengan IP sebesar 20,18%. Pengaruh geopolimer berbasis GGBFS pada nilai indeks plastis yaitu menurunnya nilai IP pada penambahan aktivator alkali, nilai IP pada variasi B (Tanah 80%, GGBFS 20%, S/L 1/2) sebesar 10,68% dan variasi C (Tanah 80%, GGBFS 20%, S/L 1/2,5) sebesar 9,84%. Pada pengujian kuat tekan bebas, pengaruh geopolimer berbasis GGBFS dapat meningkatkan nilai kuat tekan bebas pada waktu pemeraman 28 hari dengan nilai qu sebesar 29,384 kg/cm2 untuk variasi C (Tanah 80%, GGBFS 20%, S/L 1/2,5) dan 18,574 kg/cm2 untuk variasi B (Tanah 80%, GGBFS 20%, S/L 1/2) jika dibandingkan dengan Variasi A (Tanah asli) sebesar 1,590 kg/cm2.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	03-Fakultas Teknik 03-Fakultas Teknik > 22201-Jurusan Teknik Sipil
Depositing User:	Mrs Fadhila Putri Cahyani
Date Deposited:	27 May 2024 10:24
Last Modified:	19 Jun 2024 14:16
URI:	http://eprints.untirta.ac.id/id/eprint/35593

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