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KORELASI NILAI KOEFISIEN ARAH SERAT BETON TERHADAP KEKUATAN TARIK LENTUR PADA BETON DENGAN SERUTAN BAJA MAUPUN HAREX SF Zulaicha, Lilis; Marwanto, Marwanto
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 7, No 2 (2015): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Concrete has high compressive strength that is capable of supporting a large and heavy structures. But concrete has a low tension strength and brittle nature (Brittle). The weakness of this concrete properties can be improved by providing treatment such as provide fiber. There are several fibers that can be used to improve the properties of concrete and one of them is the steel fibers. Steel fibers possess the strength and modulus of elasticity which is relatively high. Moreover steel fibers do not change the shape of the influence of alkali in the cement. Imposition in a long period o f time does not affect the mechanical properties of steel fiber. Bond in the composition of the mixture can be increased because fastening mechanically. The study used the steel shavings and fiber materials Harex SF. The aim of this examination was intended to determine the coefficient of concrete fiber orientation at the same time the value of flexural tension strength of concrete produced in the concrete mix wearing Harex SF fiber or steel shavings. Steel fiber used in this study using the percentage of 1 until 4 percent of the weight of the concrete mix and perform quality control for the split tension strength of concrete at 28 days. From this research, the percentage of 3 percent as the optimum value based on the ease of doing the concrete (workability) used for research flexural tension strength of concrete and fiber orientation coefficient of concrete in the concrete with steel shavings and concrete with fibers Harex SF. From the testing that has been done shows: flexural tension strength fiber-reinforced concrete Harex SF 3 percent of 5,037 MPa and flexural tension strength of concrete with steel shavings of 11,035 MPa and the coefficient offiber direction concrete well with fiber Harex SF and shavings o f steel both are between 0 and 1 (0 less than or equal to eta of phi less than or equal to 1) with an average value close to 0, which means both fibers are working properly so that is proven to increase the tension strength offlexural concrete.

KORELASI NILAI KOEFISIEN ARAH SERAT BETON TERHADAP KEKUATAN TARIK LENTUR PADA BETON DENGAN SERUTAN BAJA MAUPUN HAREX SF Lilis Zulaicha; Marwanto Marwanto
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 7, No 2 (2015): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Concrete has high compressive strength that is capable of supporting a large and heavy structures. But concrete has a low tension strength and brittle nature (Brittle). The weakness of this concrete properties can be improved by providing treatment such as provide fiber. There are several fibers that can be used to improve the properties of concrete and one of them is the steel fibers. Steel fibers possess the strength and modulus of elasticity which is relatively high. Moreover steel fibers do not change the shape of the influence of alkali in the cement. Imposition in a long period o f time does not affect the mechanical properties of steel fiber. Bond in the composition of the mixture can be increased because fastening mechanically. The study used the steel shavings and fiber materials Harex SF. The aim of this examination was intended to determine the coefficient of concrete fiber orientation at the same time the value of flexural tension strength of concrete produced in the concrete mix wearing Harex SF fiber or steel shavings. Steel fiber used in this study using the percentage of 1 until 4 percent of the weight of the concrete mix and perform quality control for the split tension strength of concrete at 28 days. From this research, the percentage of 3 percent as the optimum value based on the ease of doing the concrete (workability) used for research flexural tension strength of concrete and fiber orientation coefficient of concrete in the concrete with steel shavings and concrete with fibers Harex SF. From the testing that has been done shows: flexural tension strength fiber-reinforced concrete Harex SF 3 percent of 5,037 MPa and flexural tension strength of concrete with steel shavings of 11,035 MPa and the coefficient offiber direction concrete well with fiber Harex SF and shavings o f steel both are between 0 and 1 (0 less than or equal to eta of phi less than or equal to 1) with an average value close to 0, which means both fibers are working properly so that is proven to increase the tension strength offlexural concrete.

Substitusi Pasir Besi Dengan Bestmitell Terhadap Nilai Kuat Tekan Dan Porositas Beton Rifki Pratama; Lilis Zulaicha; Retnowati Setioningsih
Retii 2021: Prosiding Seminar Nasional ReTII ke-16
Publisher : Institut Teknologi Nasional Yogyakarta

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ABSTRACT This research was conducted to determine the compressive strength and porosity of concrete with variations of 0%, 5%, 15%, 25% iron sand as a substitute for fine aggregate and variations of 0%, 0.3% bestmitell as an additive to concrete mixtures. This research is also intended to compare concrete with or without Bestmitell added materials. The test was carried out at the age of 41 days, with a cylindrical specimen with a height of 30 cm and a diameter of 15 cm, with a total of 48 specimens. The results of testing the average compressive strength of normal concrete (BN) were 26.233 MPa. The results of testing the average compressive strength of iron sand concrete without bestmitell are at (BP15) with a compressive strength of 26.270 MPa. The test results for iron sand concrete and bestmitell were highest at (BP2503) with a compressive strength of 31.780 MPa. The results of the porosity test in each test object increased from normal concrete (BN) with a porosity of 1.39%. In this study, the effect of porosity is very small; to the compressive strength of concrete with a coefficient of R2 = 0.0015 and R2 = 0.1956. Keywords: Concrete, Iron Sands, Bestmitell, Compresstion strength, Porosity.

ANALISIS PEMBEBANAN JEMBATAN BH-1979 JALUR KERETA API BANDARA YIA ZAKI AFLAH RAMADHAN; LILIS ZULAICHA; ISMANTO HS
Retii 2021: Prosiding Seminar Nasional ReTII ke-16
Publisher : Institut Teknologi Nasional Yogyakarta

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Yogyakarta International Airport, is a new airport which built because Adisucipto Airport exceeds operating capacity. But, the existence of a new airport in Kulon Progo raises several new problems, one of which is the accessibility of public transportation. The ease of accessibility of public transportation, especially trains is very important, so that in 2020 the YIA Airport Railway construction project began. One of the bridges used on the YIA Airport Railway is the WTP Double which is steel bridge. It will review the design of the plate girder from the BH-1979 Bridge which is a WTP Double bridge located at stationing 0+175. The method used in the completion of this final project begins with observing the BH-1979 Bridge, then taking data from Istaka-Catur-Mina, KSO. Furthermore, the calculation of the load using PM Nomor 60 Tahun 2012 and SNI 2833:2016 and analyzed using SAP2000. The results of the analysis obtained are, Vu = 214,834 kN and Mu = 470,472 kNm on Stringer Beam. Then, Vu = -596,926 kN and Mu = 1.490,0013 kNm on Floor Beam. Latest Vu = 1.559,721 kN and Mu = 9.798,9593 kNm on Main Girder. Keywords: Plate Girder, Railway Bridge, Steel Bridge, Yogyakarta International Airport

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