“Pengaruh Molaritas Terhadap Stabilisasi Tanah Geopolimer Dengan Perbandingan Waktu Pemeraman”

Febri, Noval (2022) “Pengaruh Molaritas Terhadap Stabilisasi Tanah Geopolimer Dengan Perbandingan Waktu Pemeraman”. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Tanah lempung merupakan tanah yang memiliki daya dukung rendah , permeabilitas rendah dan kembang susut yang tinggi. Dalam Pembangunan sebuah konstruksi tanah lempung merupakan tanah yang tidak dapat dilakukan pembangunan diatasnya karena tidak dapat menopang konstruksi diatasnya, Upaya stabilisasi dilakukan untuk memperbaiki karakteristik tanah sehingga dapat menopang konstruksi diatasnya. Stabilisasi dengan geopolimer sudah pernah dilakukan penelitian sebelumnya, banyak penelitian geopolimer dengan berbagai variasi. Penelitian tugas akhir terapan ini memfokuskan pada stabilisasi tanah menggunakan geopolimer berbasis high calcium fly ash dengan penambahan kadar geopolimer sebesar 10%, 20%, 30%, . Penambahan geopolimer berbasis high calcium fly ash 10% memberikan hasil berat volume tanah meningkat sebesar 1.66 gr/cm3, kadar air tanah menurun dengan fly ash 10%, 20%, 30%, dengan pengujian dengan pemeraman selama 21 hari mendapatkan hasil UCT sebesat 2,55 kg/cm2 .Pengaruh penambahan geopolimer ditinjau terhadap sifat fisik, sifat mekanik dan sifat kimiawi dan mikropori dari kondisi tanah lempung inisial.Kondisi tanah inisial memiliki klasifikasi tanah lempung dengan plastisitas sedang. Parameter fisik dan mekanik yang didapatkan antara lain nilai berat volume 1.62 gr/cm3, kadar air 36.32%, angka pori 1.23, specify gravity 2.65, indeks plastisitas 37.82%, kadar air optimum 29.33%, berat kering maksimum 1.28 gr/cm3,dan kuat tekan 0.62 kg/cm2. Pada stabilisasi tanah geopolimer dengan menambahkan kadar fly ash ,Naoh dan Na2SiO3 memberikan hasil yang cukup efisein, dimana parameter fisik dan mekanik diantara lain nilai berat volume 1.70 gr/cm3 meningkat dari tanah asli, kadar air menurun 24.42% dari tanah asli,angka pori menurun 0.80 terhadap tanah asli, specify gravity menurun menjadi 2,46, indeks plastisitas menurun hingga 15,61% hal ini menandakan bahwa penurunan indeks plastis memberikan kesimpulan bahwa tanah dengan plastisitas tinggi menjadi plastisitas rendah, kemudian kadar air optimum menurun hingga 24,41%, berat kering maksimum naik hingga 1,37 dan kuat tekan bebas 1,80 kg/cm3. Pada permodelan Plaxis tanah initial mendapatkan hasil safety factor sebesar 1,39 , dan untuk penurunan tanah sebesar 34,51 mm . Pada tanah stabilisasi tanah geopolimer dengan menambahkan kadar fly ash, NaOh dan Na2SiO3 memberikan peningkatan safety factor sebesar 2,74 dan perpindahan total sebesar 186 mm. Pada permodelan GEO 5 safety factor meningkat dengan hasil 2.18
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Clay soil is a soil that has low bearing capacity, low permeability and high shrinkage expansion. In the construction of a clay soil construction is soil that cannot be built and cannot support the construction on it. Stabilization efforts are carried out to improve the characteristics of the soil so that it can support the construction on it. Stabilization with geopolymers has been done before, there are many geopolymer studies with various variations. This applied final project research is focused on soil stabilization using geopolymer based on high calcium fly ash with the addition of geopolymer content of 10%, 20%, 30%, . The addition of a geopolymer based on high calcium fly ash 10% gave the result that the soil volume weight increased by 1.66 gr/cm3, the soil water content decreased with fly ash 10%, 20%, 30%, with testing with curing for 21 days, the UCT was 2, 55 kg/cm2. The effect of adding geopolymer in terms of physical properties, mechanical properties and chemical properties and micropores of the initial clay soil conditions. Initial soil conditions have a clay soil classification with medium plasticity. The physical and mechanical parameters obtained include the volume weight value of 1.62 g/cm3, water content 36.32%, pore number 1.23, specific gravity 2.65, plasticity index 37.82%, optimum moisture content 29.33%, maximum dry weight of 1.28 g/cm3, and compressive strength of 0.62 kg/cm2. The stabilization of geopolymer soil content by adding fly ash, NaOH and Na2SiO3 gives quite efficient results, where the physical and mechanical parameters between the volume weight value of 1.70 gr/cm3 increase from the original soil, the water content decreases by 24.42% from the original soil, the void ratio decreases 0.80 to the original soil, determine that gravity decreases to 2.46, the plasticity index decreases to 15.61% This indicates that the decrease in the plastic index gives the conclusion that the soil with high plasticity becomes low plasticity, then the optimum water content decreases to 24, 41%, the maximum dry weight increased to 1.37 and the free compressive strength was 1.80 kg/cm3. In Plaxis modeling the initial soil obtained a safety factor of 1.39 , and for soil subsidence of 34.51 mm . In soil stabilization geopolymer soil by adding fly ash, NaOh and Na2SiO3 gave an increase in safety factor of 2.74 and a total displacement of 186 mm. In the GEO 5 modeling the safety factor increased with the result of 2.18

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	High calcium fly ash, lempung,UCT, specify gravity. High calcium fly ash, lempung,UCT, specify gravity.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Vocational > 22301-Civil Infrastructure Engineering (D4)
Depositing User:	Mr. Marsudiyana -
Date Deposited:	14 Jul 2026 04:20
Last Modified:	14 Jul 2026 04:20
URI:	http://repository.its.ac.id/id/eprint/134892

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