Ghewa, Gabriel Jose Posenti (2020) Investigasi Efek Penggunaan Engineered Cementitious Composite Dan Supplementary Material Pada Beton Terhadap Durability Properties Dan Time To Corrosion Induced Crack. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Keretakkan yang diakibatkan korosi merupakan salah satu penyebab utama kerusakan pada struktur beton bertulang. Lingkungan laut merupakan lingkungan yang agresif terhadap beton, karena mengandung klorida dan sulfat. Klorida yang menginfiltrasi masuk ke dalam badan beton mengakibatkan tulangan dalam beton mengalami korosi sehingga menekan bagian dalam beton hingga menimbulkan retak sampai permukaan beton. Keretakan ini jika dibiarkan akan membuat kekuatan beton bertulang berkurang. Penelitian ini akan menginvestigasi efek penambahan supplementary material pada beton normal dan beton dari material Engineered Cementitious Composite (ECC) ditinjau dari durability (ketahanan) beton dan time to corrosion induced crack ( retak akibat induksi korosi). Properti durability yang diuji dalam penelitian ini adalah nilai sorptivity dan difusi klorida. Supplementary material seperti fly ash tipe F dan silica fume, serta ECC memiliki sifat permeabilitas yang rendah, sehingga dianggap dapat memberikan ketahanan lebih terhadap penetrasi klorida pada beton. Pengujian percepatan korosi pada penelitian ini menggunakan metode galvanostatik. Beton akan diposisikan berada pada kondisi terendam sebagian di dalam larutan NaCl. Jenis beton yang digunakan dalam penelitian ini sebagai pembanding terhadap beton normal (NC) adalah beton dengan fly ash 15% (FA), beton dengan silica fume 5% (SF), beton dengan gabungan fly ash 10% dan silica fume 5% (SF+FA), dan ECC. Hasil penelitian menunjukkan ECC menjadi material yang memiliki durabilitas terbaik, ditinjau dari nilai sorptivitas, koefisien difusi dan corrosion rate. ECC memiliki corrosion rate 46% lebih kecil dari beton normal, sementara FA, SF, dan SF+FA memiliki corrosion rate 14%, 6%, dan 9% lebih kecil dari beton normal. ECC mereduksi sorptivitas beton sebesar 60 % dari nilai sorptivitas beton normal, sementara FA, SF, dan SF+FA mereduksi sorptivitas beton sebesar 21%, 20% dan 20.5 %. ECC memiliki keofisien difusi 3.5% lebih kecil dibandingkan beton normal, sementara FA, SF, dan SF+FA memiliki nilai koefisien difusi 3%, 2.8%, dan 2.9% lebih kecil dibandingkan beton normal.
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Crack caused by corrosion is one of the main causes of reinforced concrete damage, especially in the marine environment. The marine environment is an aggressive environment for concrete because it contains aggressive agent such as chloride. Chloride that penetrates into reinforced concrete can lead to reinforcement over the time, so that the corrosion product will causes stress at the interface of concrete steel reinforcement and finally generating cracks to the concrete surface. This research will investigate the effect of Engineered Cementitious Composite (ECC) and supplementary material on the durability properties and time to corrosion induced crack of concrete. Durability properties that investigated in this research is sorptivity and chloride diffusion. ECC and supplementary material such as type F fly ash and silica fume, well known as low permeability materials, considered to provide a good performance to resist water penetration. Accelerated corrosion test in this research using the galvanostatic method. Galvanostatic method in this research was used to simulate corrosion process that occurs around the marine environment. with this method, cocnrete will partially immersed in 3.5% NaCl solution as a subtitute for sea water. There are 5 types of concrete that used in this research, there are plain concrete (NC), concrete with 15% fly ash (FA), concrete with 5% silica fume (SF), concrete with 10% fly ash and 5% silica fume mixed (SF+FA), and ECC. The result showed ECC to be the material that has the best durability, due to sorptivity and diffusion coefficient. ECC has 46% smaller corrosion rate compared with NC, while FA, SF, and SF+FA has 14%, 6%, and 9% smaller corrosion rate compared with NC. ECC reduces concrete sorptivity by 60% compared with NC’s sorptivity, while FA, SF and SF+FA respectively reduce concrete sorptivity by 21%, 20% and 20.5% compared with NC. ECC has 3.5% smaller diffusion coefficient compared with NC, while FA, SF, and SF+FA has 3%, 2.8%, and 2.9% smaller diffusion coefficient compared with NC.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTS 620.118 Ghe i-1 2020 |
| Uncontrolled Keywords: | Beton, Durability, Corrosion Rate, ECC, Engineered Cementitious Material, Supplementary Material, Fly Ash, Crack |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.75 Corrosion-resistant materials T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. T Technology > TA Engineering (General). Civil engineering (General) > TA440 Concrete--Cracking. T Technology > TA Engineering (General). Civil engineering (General) > TA467 Iron and Steel Corrosion and protection against corrosion |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis |
| Depositing User: | Gabriel Jose Posenti Ghewa |
| Date Deposited: | 05 Apr 2024 07:45 |
| Last Modified: | 05 Apr 2024 07:45 |
| URI: | http://repository.its.ac.id/id/eprint/73887 |
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