Adrianta, Rahman Adima (2019) Pengaruh Abu Batubara dan Healing Agent terhadap Kemampuan Self Healing Agent. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Beton merupakan bahan yang rawan terjadi keretakan karena tegangan tariknya relatif kecil. Pengaruh pembebanan secara terus menerus akan memperbesar keretakan mikro yang memungkinkan air dan zat-zat lain akan masuk ke dalam beton dan menyebabkan korosi. Dalam penelitian ini penambahan healing agent berupa bakteri dan FABA diharapkan dapat meningkatkan kemampuan self healing beton. Healing agent yang mengandung bakteri dimasukkan ke dalam agregat buatan pasta geopolimer bertujuan untuk melokalisir konsentrasi bakteri serta melindungi bakteri dari proses mixing sehingga dapat melakukan autonomous healing pada crack secara optimal. Penambahan FABA pada matriks beton diharapkan membantu mekanisme healing secara autogenous dengan pembentukan C-S-H baru. Komposisi agregat buatan geopolimer menggunakan perbandingan massa antara sodium silikat dan sodum hidroksida sebesar 2, sedangkan rasio perbandingan massa antara alkali aktivator dibanding fly ash sebesar 0.25. Komposisi beton mengandung 20% fly ash terhadap berat binder dan 5% bottom ash terhadap berat agregat halus. Dari penelitian ini diketahui pengaruh penambahan healing agent dan FABA terhadap luas permukaan retak dan kedalaman retak, serta pengaruh penambahan healing agent terhadap kuat tekan pasta. Pengamatan secara kimia dilakukan untuk menentukan mineral apa yang terbentuk pada celah retak serta pengamatan biologi dilakukan untuk mengamati keberadaan bakteri pada umur tertentu. Hasil menunjukkan penambahan healing agent dapat menghambat strength development hingga 28 hari namun berperan secara aktif pada umur 7 hari. Pengaruh healing agent dan FABA dapat meningkatkan kemampuan healing dalam tinjauan luas retak permukaan dan kedalaman retak, namun hasil yang didapatkan masih belum signifikan.
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Concrete is a material that tend to crack easily because a relatively low tension stress. The effect of continuous loading will amplify “micro-crack” that will lead water and other substances to reside in the concrete and cause corrosion. In this research, the addition of bacteria and FABA as healing agents are expected to improve the self-healing capability of the concrete. The healing agent which contains bacteria are injected to the artificial “geopolimer” paste aggregate, are expected to localize the bacteria concentration and protect the bacteria from mixing process so it will do autonomous healing at the crack optimally. The addition of FABA to the matrix is expected to help the healing mechanism autogenously with creating new C-S-H compound. The artificial geopolimer aggregate composition use mass comparison between sodium silicate and sodium hidroxide with 1 : 2 comparison, wjile the mass comparison between alkali activator and fly ash use 1 : 4 comparison. The concrete composition contain 20% fly ash compared to binder weight and 5% bottom ash compared to fine aggregate weight. From this research, it will found the effect of healing agents addition and FABA to the concrete crack surface area, crack depth and paste compressive strength. Chemical research are done to determine which minerals are formed inside the crack, while the biological research are done to observe the condition of bacteria at certain period of time. The research result shows the addition of healing agent can obstruct the concrete strength development until the 28th day, but it performs actively at 7th days.. The effect of healing agents and FABA to crack’s surface area healing process and it’s depth are considered to be not fully significant.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | retak, self healing, autonomous healing, auotgenous healing, fly ash |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA440 Concrete--Cracking. T Technology > TA Engineering (General). Civil engineering (General) > TA441 Aggregates |
| Divisions: | Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis |
| Depositing User: | Rahman Adima Adrianta |
| Date Deposited: | 15 Jul 2024 01:09 |
| Last Modified: | 15 Jul 2024 01:09 |
| URI: | http://repository.its.ac.id/id/eprint/61171 |
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