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All Journal Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Soshum: Jurnal Sosial dan Humaniora
Setyono, Evin Yudhi
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Arts Humanities Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Engineering Languange, Linguistic, Communication & Media Social Sciences Transportation

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ANALISIS INJEKSI EPOXY PADA PERBAIKAN RETAK BETON TERHADAP BEBAN LENTUR Herlambang, Fajar Surya; Setyono, Evin Yudhi
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol 23, No 2 (2018): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v23i2.1360

Abstract

One of the causes of cracking in concrete beams is excessive gravitational load,mainly due to live loads that exceed capacity. The cracked beam can be repaired by the epoxy injection method but the condition of the repair is the strength value must reach the condition before cracking. The purpose of this study was to determine the effectiveness of injection in filling cracks and assessing epoxy ability in restoring beam strength. The specimen is a f'c 25 reinforced concrete block with dimensions of 15x15x60 cm. Tests are carried out with 2 methods, that are loading test according to SNI 03-4154-1996 and UPV. Load test and UPV were carried out at the age of 28 days and 3, 6. 9 days after epoxy injection. Based on the load test, epoxy injection is able to restore beam flexural strength up to 50% which is indicated by achieving load values after being injected. From the UPV test, it is known that epoxy injection is able to fill cracks which are characterized by increasing ultrasonic wave propagation speed on the test object after injection compared to when cracked but the injection cannot completely fill the cracked area which is indicated by a smaller wave propagation value than when the object the test has not experienced a crack. Based on a series of research activities, it is very necessary to pay attention to the injection process such as viscosity and injection pressure in order to obtain good results.Kata kunci : crack, injection, epoxy
COMPARISON OF ULTRASONIC PULSE VELOCITY TEST RESULTS WITH AND WITHOUT USING TRANSDUCER STABILIZER Herlambang, Fajar Surya; Setyono, Evin Yudhi
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol 25, No 1 (2020): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v25i1.1914

Abstract

Some research on the Ultrasonic Pulse Velocity (UPV) test has not covered much about the problems encountered during the data collection process. Based on experience using UPV test equipment, it is known that instability occurs in reading the test results. This is caused by the inability of the operator, in maintaining the stability of the transducer both in its position and pressure, especially in the measurement with the overhead position. Therefore, in this study a tool was made to make the transducer stable in the test position. Comparison of measurement results shows that, the uncertainty of wave velocity measurement decreases from the range of 4% -17% to 0.2% -0.4%. Meanwhile, the uncertainty of measurement of wave travel time decreased from the range of 0.8% -14% to 0.1% -0.4%. This can be interpreted that, the level of accuracy of measurements using a transducer stabilizer is 99.6% -99.9%. Thus, the use of transducer stabilizers is believed to be able to improve measurement accuracy.
Students' Perception of Duolingo as an English Learning Tool at Politeknik Negeri Bali Civil Engineering Department Paramita, I Gusti Ayu Dewi; Setyono, Evin Yudhi; Yuliantini, Ni Nyoman; Suciani, Ni Ketut
SOSHUM : Jurnal Sosial dan Humaniora Vol. 14 No. 2 (2024): July 2024
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/soshum.v14i2.158-163

Abstract

This study examined the perception of the Android-based Duolingo application as an English learning resource among students enrolled in the D3 Civil Engineering program at Bali State Polytechnic. Data were collected through surveys and interviews involving thirty-two fourth-semester students, randomly selected from one class to represent the entire population. The study employed a quantitative approach, focusing on gathering detailed information regarding students' perceptions of Duolingo as a supplementary tool for learning English. The results indicated that 3.70% of respondents had a very good perception of Duolingo, 51.85% had a good perception, 33.33% had an adequate perception, and 11.11% had a poor perception. These findings suggest that the majority of D3 Civil Engineering students at Bali State Polytechnic view the Duolingo application positively. Overall, it can be concluded that Duolingo is perceived as an effective and beneficial resource for enhancing English language skills among these students.
Co-Authors Fajar Surya Herlambang Ni Ketut Suciani Paramita, I Gusti Ayu Dewi Yuliantini, Ni Nyoman