Analisa Kemampuan Balok Underreinforced Concrete Yang Diperbaiki Dengan Metode Epoxy Injection

Prihatanto, Rusman (2007) Analisa Kemampuan Balok Underreinforced Concrete Yang Diperbaiki Dengan Metode Epoxy Injection. Other thesis, Institut Teknologi Sepuluh Nopember Surabaya.

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Abstract

Dalam dunia konstruksi, crack (retak) merupakan permasalahan yang sering terjadi. Retak tersebut disebabkan oleh beberapa hal, diantaranya kesalahan perencanaan, umur bangunan serta beban yang berlebih (over load). Apabila retka tersebut dibiarkan begitu saja dan tidak ada usaha untuk menutupnya maka akan menyebabkan menurunnya kinerja dalam memikul beban. Metode injeksi merupakan salah satu cara untuk menutup/mengisi keretakan-keretakan yang terjaadi pada struktur, agar struktur dapat berfungsi sesuai perencanaan. Pengujian eksperimental dilakukan terhadap balok kondisi underreinforced dengan variasi mutu beton <fc) 25, 30, 35 Mpa dan masing-masing mutu beton dibuat tiga buah balok. Sebanyak 2 balok dari masing-masing mutu beton dites lentur dengan thirdpoint loading sampai ultimate. Retak-retak yang terjadi baik itu retak lentur maupun retak geser diperbaiki (repair) dengan metode injeksi. Untuk menginjeksi retakan pada balok menggunakan bahan Sikadur 752. setelah itu benda uji balok dites lagi dan dibandingkan dengan benda uji yang tidak direpair. Hasil pengujian menunjukkan bahwa ada peningkatan daktilitas dari balok yang direpair dibandingkan dengan balok yang tidak direpair. Balok dengan mutu beton (fc) 25 MPa, Benda uji A daktilitasnya meningkat 43.89 %, benda uji B meningkat 43.92 %. Balok dengan mutu beton (f c) 30 MPa, benda uji A daktilitasnya meningkat 41.12 %, benda uji B meningkat 33.52 % dan balok dengan mutu beton (f c) 35 MPa, benda uji A daktilitasnya meningkat 30.10 %, benda uji B meningkat 32.92 %. Selain daktilitas, repair juga menyebabkan meningkatnya energi disipasi (AE) dari balok. Balok dengan mutu beton (fc) 25 MPa nilai disipasi benda uji A meningkat 30.623%, benda uji B meningkat sebesar 30.04%. Balok dengan mutu beton (f’c) 30 MPa nilai disipasi benda uji A meningkat 24.34 %, benda uji B meningkat sebesar 19.224 % dan Balok dengan mutu beton (f’c) 35 MPa nilai disipasi benda uji A meningkat 55.71%, benda uji B meningkat sebesar 58.486%
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In the world of construction, cracks are a common problem. The cracks are caused by several things, including planning errors, the age of the building and overload. If the crack is left alone and there is no effort to close it, it will cause a decrease in performance in carrying the load. The injection method is one way to close/fill the cracks that occur in the structure, so that the structure can function according to plan. Experimental tests were carried out on underreinforced beams with variations in concrete quality <fc) 25, 30, 35 MPa and three blocks were made for each concrete quality. A total of 2 beams of each concrete quality were tested for flexure with third-point loading to ultimate. Cracks that occur, both flexural cracks and shear cracks, are repaired using the injection method. Sikadur 752 was used to inject cracks into the beam. After that, the beam specimen was tested again and compared with the unrepaired specimen. The test results show that there is an increase in the ductility of the repaired beam compared to the unrepaired beam. Beams with concrete quality (fc) 25 MPa, specimen A increased ductility 43.89 %, specimen B increased 43.92 %. Beams with concrete quality (f c) 30 MPa, specimen A ductility increased 41.12%, specimen B increased 33.52% and beams with concrete quality (f c) 35 MPa, specimen A increased ductility 30.10%, specimen B increased 32.92%. Besides ductility, repair also causes an increase in energy dissipation (AE) of the beam. For beams with concrete quality (fc) 25 MPa, the dissipation value of specimen A increased by 30.623%, specimen B increased by 30.04%. Beams with concrete quality (f'c) 30 MPa dissipation value of specimen A increased by 24.34%, specimen B increased by 19.224% and beams with concrete quality (f'c) 35 MPa dissipation value of specimen A increased by 55.71%, specimen B increased by 58.486%

Item Type:	Thesis (Other)
Additional Information:	RSS 620.137 Pri a
Uncontrolled Keywords:	retak, crack, mutu beton, underreinforced, injeksi, ultimate, daktilitas, energi disipasi
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA444 Reinforced concrete
Divisions:	Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	EKO BUDI RAHARJO
Date Deposited:	29 Dec 2022 07:14
Last Modified:	29 Dec 2022 07:14
URI:	http://repository.its.ac.id/id/eprint/95292

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