@phdthesis{eprintuntirta52306,
            year = {2025},
          school = {Fakultas Teknik Universitas Sultan Ageng Tirtayasa},
           title = {PENGARUH PENAMBAHAN GEOPOLIMER BERBAHAN 
FLY ASH PADA STABILISASI TANAH DASAR TERHADAP 
ANALISIS NILAI KUAT TEKAN BEBAS (Studi Kasus: Jalan Raya Sobang, Kecamatan Sobang, Pandeglang, Banten)},
          author = {Raina Mutiara Aini},
           month = {July},
        abstract = {Subgrade soils with low bearing capacity present significant challenges in infrastructure development, as observed at Jalan Raya Sobang, Kabupaten Pandeglang, Banten, which shows a field CBR value of 2,25\%. This study aims to evaluate the effect of adding fly ash-based geopolymer on subgrade stabilization, particularly in improving unconfined compressive strength (qu). A series of tests was conducted to  analyze the physical properties and qu values. Stabilization was performed by adding 15\% fly ash and an alkaline activator solution (NaOH and Na{$_2$}SiO{$_3$}) with varying NaOH molarities of 8M, 12M, and 15M, and an S/L ratio of 1/2,5. Tests were performed after 0, 7, 14, and 28 days of curing. The native soil was classified as OH (organic clay with medium to high plasticity) with a plasticity index of 18,3\%. The addition of fly ash-based geopolymer reduced the PI to 12,2\% for B1 (85\% soil, 15\% FA, 8M NaOH), 8,6\% for B2 (85\% soil, 15\% FA, 12M NaOH), and 7,6\% for B3 (85\% soil, 15\% FA, 15M NaOH). The qu values increased to 15,528 kg/cm? for B1, 18,812 kg/cm? for B2, and 12,46 kg/cm? for B3, with the optimum value observed in B2 after 28 days of curing.},
             url = {https://eprints.untirta.ac.id/52306/},
        keywords = {soil, fly ash, geopolymer, UCT, molarity}
}