Lempung Dengan Penambahan High Calcium Fly Ash Dalam Geopolimer Sebagai Perbaikan Tanah Lempung Di Daerah Surabaya Timur Dengan Uji Fisik Dan Uji Mekanik Tanah

Pramono, Indra (2022) Lempung Dengan Penambahan High Calcium Fly Ash Dalam Geopolimer Sebagai Perbaikan Tanah Lempung Di Daerah Surabaya Timur Dengan Uji Fisik Dan Uji Mekanik Tanah. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini dilatarbelakangi oleh tanah dasar di jalan kertajaya di daerah Surabaya Timur yang bersifat lempung dimana tanah lempung dapat menurunkan daya dukungnya karena kandungan air yang tinggi. Tentu saja hal ini akan menimbulkan masalah konstruksi karena massa tanah yang bervariasi. Untuk memperbaiki tanah liat perlu distabilkan. Stabilisasi dengan geopolimer berbahan dasar fly ash berkalsium tinggi dengan penambahan 10%, 20% dan 30%. Kandungan geopolimer yang digunakan mengacu pada penelitian sebelumnya dengan fly ash 70% dan alkali (NaOH dan Na2SiO3) 30%. terhadap geser dan tekan merupakan upaya yang dilakukan untuk meningkatkan ketahanan tanah Jenis penilitian dalam penelitian ini adalah kuantitaif dengan metode pengumpulan data melalui penngujian secara langsung di Laboratorium Transportasi dan Geoteknik (LTG) Kampus ITS Manyar. Pengujian dilakukan dengan metode uji fisik dan mekanik tanah. Pengujian meliputi analisa ayakan, hidrometer, atterberg limit sebagai uji fisik dan tes proktor, unconfined compression test(UCT), dan Swelling test potential. Hasil data penelitian di modelkan dalam aplikasi berbasis FEM yaitu Plaxis V21 dan Geo 5 untuk mengetahui nilai safety faktor dan penurunan tanah Hasil dari penelitian yang dilakukan dapat disimpulkan Tanah lempung inisial mempunyai karakteristik fisik dan mekanik diantaranya mempunyai berat volume sebesar 1,65 gr/cm3 ; kadar air mencapai 29,33 %, angka pori sebesar 1,08; porositas 0,52; berat volume kering tanah sebesar 1,28; nilai kuat tekan sebesar 0,61;swelling potential sebesar 3,68 % dan specify gravity 2.655 yang termasuk lempung organik dan juga mempunyai indeks plastisitas yaitu 37,94%. Penambahan geopolimer berpengaruh terhadap hasil sifat fisik dan mekanik tanah lempung Berdasarkan hasil analisis nilai berat volume tanah mengalami kadar optimum di 20% 7 hari sebesar 1,71; kadar air paling optimum terdapat pada variasi 30% 3 hari sebesar 23,75% ; angka pori paling optimum terdapat pada variasi 10% 1 hari sebesar 0,89; porositas paling optimum terdapat pada variasi 10 % 1 hari sebesar 0,47; berat volume kering paling optimum terdapat pada variasi 20 % 7 hari sebesar 1,37; specify gravity paling optimum terdapat pada variasi 20 % 7 hari sebesar 2,692; kuat tekan paling optimum terdapat pada variasi 20 % 7 hari sebesar 3,49 kg/cm2 ; ; swelling potential paling optimum terdapat pada variasi 30 % 7 hari sebesar 0,47 %; serta nilai indeks plastis paling optimum terdapat pada variasi 10 % 7 hari sebesar 23,28 % dari hasil rekapitulasi nilai optimum tiap pengujian didapat nilai paling optimum penambahan geopolymer fly ash terdapat pada kadar variasi 20 % 7 hari
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The background of this research is that the subgrade on Jalan Kertajaya in the East Surabaya area is clay in which clay can reduce its carrying capacity due to its high water content. Of course this will cause construction problems because of the varying soil mass. To improve the clay needs to be stabilized. Stabilization with high calcium fly ash based geopolymer with addition of 10%, 20% and 30%. The geopolymer content used refers to previous studies with 70% fly ash and 30% alkali (NaOH and Na2SiO3). against shear and compression is an effort made to increase soil resistance The type of research in this study is quantitative with the method of collecting data through direct testing at the Transportation and Geotechnical Laboratory (LTG) ITS Manyar Campus. Tests were carried out using physical and mechanical soil test methods. The tests include sieve analysis, hydrometer, atterberg limit as a physical test and proctor test, unconfined compression test (UCT), and Swelling test potential. The results of the research data are modeled in FEM-based applications, namely Plaxis V21 and Geo 5 to determine the value of the safety factor and soil subsidence The results of the research carried out can be concluded that the initial clay has physical and mechanical characteristics including having a volume weight of 1.65 gr/cm3; the water content reached 29.33%, the pore number was 1.08; porosity 0.52; dry volume weight of the soil is 1.28; compressive strength value of 0.61; swelling potential of 3.68% and specify gravity of 2.655 which includes organic clay and also has a plasticity index of 37.94%. The addition of geopolymer affects the results of physical and mechanical properties of clay. the most optimum water content is found in the variation of 30% 3 days by 23.75%; the most optimum void ratio is found in the variation of 10% 1 day of 0.89; the most optimum porosity is found in the variation of 10% 1 day of 0.47; The most optimum dry volume weight was found in the variation of 20% 7 days of 1.37; the most optimum specify gravity is found in the variation of 20% 7 days of 2,692; The most optimum compressive strength is found in the variation of 20% 7 days at 3.49 kg/cm2; ; The most optimum swelling potential is found in the variation of 30% 7 days at 0.47%; and the most optimum plastic index value was found in the variation of 10% 7 days of 23,28%. From the recapitulation results of the optimum value for each test, the most optimum value for the addition of geopolymer fly ash was found at the variation level of 20% 7 days.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	Geopolymer, NaOH, Stabilisasi, Fly Ash, Uji Fisik, Uji Mekanik. Geopolymer, NaOH, Stabilization, Fly Ash, Physical test,Mechanical test.
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 06:48
Last Modified:	14 Jul 2026 06:48
URI:	http://repository.its.ac.id/id/eprint/134909

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