Analisa Perilaku Mekanik Cement Treated Sand dengan Kekangan Pasif GFRP

Hariono, Syirly Adella Wijayanti (2024) Analisa Perilaku Mekanik Cement Treated Sand dengan Kekangan Pasif GFRP. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Diantara jenis tanah yang menunjukkan karakteristik tanah bermasalah, tanah berpasir menjadi sorotan terutama pada pasir dengan gradasi yang buruk. Pasir dengan gradasi yang buruk (poorly graded sands) membutuhkan treatment khusus, dikarenakan tidak memiliki adhesi sehingga stabilasi tidak bisa hanya dilakukan dengan pemadatan. Dibutuhkan stabilasi tambahan menggunakan semen atau disebut juga Cement treated sand (CTS). CTS adalah salah satu metode ground improvement dengan penambahan semen yang dicampurkan kedalam pasir. Pada penelitian ini menggunakan semen dengan persentase 6%, 8%, 10%, dan 12% dari total berat pasir kering. CTS dilakukan uji laboratorium untuk mengamati sifat mekaniknya menggunakan alat uji triaksial, dikarenakan keterbatasan alat uji pada laboratorium, pengujian dilakukan dengan alat uji untuk Unconfined Compression Strength (UCS) dengan pemberian Glass Fiber Reinforced Polymer (GFRP)-Jacket pada benda uji CTS sebagai kekangan pasif. Hasil dari penelitian ini menunjukkan dengan penambahan 10% semen memberikan hasil kuat tekan yang diharapkan. Penggunaan kekangan dengan FRP memberikan nilai-nilai yang seharusnya dilakukan pada alat uji triaksial, dapat diketahui bahwa nilai tegangan puncak pada confined CTS GFRP 1, 2 dan 3 lapis secara berturut-turut adalah 7.431 MPa, 16.584 MPa dan 23.741 MPa dan memiliki nilai axial strain pada saat puncak total volumetric adalah -0.0173, -0.0253, dan -0.0357. Hal tersebut menandakan FRP sebagai kekangan pasif memberikan respon yang diharapkan.
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Among the types of soil that exhibit problematic characteristics, sandy soil is particularly notable, especially poorly graded sands. Poorly graded sands require special treatment as they lack adhesion and cannot be stabilized solely through compaction. Additional stabilization with cement, known as Cement treated sand (CTS), is necessary. CTS is a ground improvement method involving the addition of cement mixed into the sand. In this study, cement percentages of 6%, 8%, 10%, and 12% of the total dry sand weight were used. Laboratory tests on CTS were conducted to observe its mechanical properties using a triaxial testing apparatus. Due to limitations in laboratory equipment, tests were conducted using the Unconfined Compression Strength (UCS) apparatus with a Glass Fiber Reinforced Polymer (GFRP) jacket applied to the CTS specimens as passive confinement. The test results indicate that the addition of 10% cement provides the expected compressive strength. The use of FRP confinement yields values that should be obtained using a triaxial test apparatus. It can be observed that the peak stress values for confined CTS GFRP with 1, 2, and 3 layers are 7.431 MPa, 16.584 MPa, and 23.741 MPa, respectively, and the axial strain values at peak total volumetric strain are -0.0173, -0.0253, and -0.0357. This indicates that FRP as a passive confinement provides the expected response.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Cement treated sand, Poorly Graded Sand, GFRP-Jacket, Kekangan Pasif, Passive Confinement
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA169.5 Failure analysis
T Technology > TA Engineering (General). Civil engineering (General) > TA355 Vibration.
T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing.
T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials.
T Technology > TA Engineering (General). Civil engineering (General) > TA433 Strength of materials.
T Technology > TA Engineering (General). Civil engineering (General) > TA434 Inorganic polymers
T Technology > TA Engineering (General). Civil engineering (General) > TA440 Concrete--Cracking.
T Technology > TA Engineering (General). Civil engineering (General) > TA455.A34 Adhesives
T Technology > TA Engineering (General). Civil engineering (General) > TA749 Soil stabilization
T Technology > TA Engineering (General). Civil engineering (General) > TA775 Foundations.
Divisions: Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis
Depositing User: Syirly Adella Wijayanti Hariono
Date Deposited: 08 Aug 2024 08:08
Last Modified: 03 Sep 2024 07:25
URI: http://repository.its.ac.id/id/eprint/114857

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