NAZIYAH, DELLY (2025) PENGARUH CAMPURAN GEOPOLIMER BERBASIS FLY ASH SEBAGAI BAHAN TAMBAH STABILISASI PADA TANAH LEMPUNG TERHADAP NILAI KUAT TEKAN BEBAS (Studi Kasus : Jl. Kampung Pasirmeong Desa Kaungcaang, Kecamatan Cadasari, Kabupaten Pandeglang, Banten). S1 thesis, Fakultas Teknik Universitas Sultan Ageng Tirtayasa.
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Abstract
The planning of road construction requires a thorough understanding of the characteristics and strength of the soil, particularly the properties that determine the soil’s bearing capacity to support the load of the construction above it. This study is aimed at identifying the classification and physical properties of the soil, as well as assessing the impact of using geopolymer based on fly ash as an additive on the soil characteristics and its unconfined compressive strength. Testing was conducted using an Unconfined Compression Tester (UCT) on soil samples mixed with the geopolymer—which contains fly ash and alkaline activators (Na₂SiO₃ and NaOH)—with a NaOH concentration of 10 M and a Na₂SiO₃ to NaOH solution ratio of 2.0. A fly ash composition of 20% was applied with variations in the solid-to-liquid (S/L) ratio of 1/2.5, 1/3, and 1/3.5. The samples were cured for durations of 0, 7, 14, and 28 days. Based on the test results, the analyzed soil was classified as OH soil, which is organic clay with medium to high plasticity, with a Plasticity Index (PI) of 18.239%. The use of fly ash-based geopolymer resulted in a reduction of the PI to 5.304%, 7.28%, and 8.43% for variations B, C, and D respectively. Furthermore, an increase in unconfined compressive strength (qu) was also observed, with an optimum value of 30.991 kg/cm² achieved in variation B after 14 days of curing. Keywords: soil stabilization, unconfined compressive strength, geopolymer
| Item Type: | Thesis (S1) | |||||||||
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| Additional Information: | Perencanaan konstruksi jalan mensyaratkan pemahaman yang mendalam terhadap karakteristik dan kekuatan tanah, khususnya sifat-sifat yang menentukan daya dukung tanah terhadap beban konstruksi yang berada di atasnya. Penelitian ini diarahkan untuk mengidentifikasi klasifikasi dan sifat fisik tanah serta menilai dampak penggunaan geopolimer berbasis fly ash sebagai bahan tambahan terhadap sifat tanah dan kekuatan tekan bebasnya. Pengujian dilakukan dengan menggunakan Unconfined Compression Tester (UCT) pada sampel tanah yang telah dicampur dengan geopolimer—mengandung fly ash dan aktivator alkali (Na₂SiO₃ dan NaOH)—dengan konsentrasi NaOH sebesar 10 M dan rasio larutan Na₂SiO₃ terhadap NaOH sebesar 2,0. Komposisi fly ash sebanyak 20% diaplikasikan dengan variasi rasio padatan terhadap cairan (S/L) 1/2,5; 1/3; dan 1/3,5. Sampel dikondisikan selama 0, 7, 14, serta 28 hari pemeraman. Berdasarkan hasil pengujian, tanah yang dianalisis diklasifikasikan sebagai tanah OH, yaitu lempung organik dengan plastisitas sedang hingga tinggi dengan Indeks Plastisitas (IP) 18,239%. Penggunaan geopolimer berbasis fly ash memberikan efek penurunan IP, yaitu 5,304% pada variasi B, 7,28% pada variasi C, dan 8,43% pada variasi D. Selain itu, peningkatan nilai kuat tekan bebas (qu) juga terlihat, dengan nilai optimal sebesar 30,991 kg/cm² dicapai pada variasi B setelah 14 hari pemeraman. Kata kunci: stabilisasi tanah, kuat tekan bebas, geopolimer | |||||||||
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction |
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| Divisions: | 03-Fakultas Teknik 03-Fakultas Teknik > 22201-Jurusan Teknik Sipil |
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| Depositing User: | Delly Naziyah | |||||||||
| Date Deposited: | 21 Aug 2025 06:25 | |||||||||
| Last Modified: | 21 Aug 2025 06:25 | |||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/54009 |
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