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All Journal Jurnal Mahasiswa Jurusan Teknik Sipil Rekayasa Sipil
Christin Remayanti Nainggolan
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Civil Engineering, Building, Construction & Architecture

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Journal : Rekayasa Sipil

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PENGARUH VARIASI AGREGAT KASAR PENYUSUN BETON TERHADAP KERAPATAN BETON DENGAN MENGGUNAKAN TRANSMISSION TIME PADA ALAT UPV (ULTRASONIC PULSE VELOCITY) Fatma Dora Indriani; Christin Remayanti Nainggolan; Ming Narto Wijaya
Rekayasa Sipil Vol 13, No 1 (2019)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2019.013.01.5

Abstract

To find out the quality of concrete, we need to test the concrete. Which is non destructive test  or testing without damaging the test object, namely with an UPV (Ultrasonic Pulse Velocity). In this study using 4 variations of coarse aggregate composition (mix design), namely porous variation, RCA (Recycled Coarse Aggregate) variation, pumice variation and fiber variation. The UPV test results in this study show that the relationship of compressive strength with amplitude (A1) or transmission time (t0) is concluded that the low homogeneity value causes higher energy loss so the amplitude value becomes lower and the value transmission time depends on the density of the concrete. In the value of compressive strength that affects homogeneity, it does not mean the higher the uniform material (homogeneity), the higher the compressive strength value.  Keywords: Amplitude, Concrete, Compressive Strength, Ultrasonic Pulse Velocity, Transmission Time
PENGARUH PERKUATAN MORTAR JAKET DENGAN VARIASI KONFIGURASI TULANGAN LONGITUDINAL BAMBU PADA KOLOM BETON BERTULANG Nurmadinah Jasman; Christin Remayanti Nainggolan; Indradi Wijatmiko; Ari Wibowo
Rekayasa Sipil Vol 13, No 1 (2019)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2019.013.01.6

Abstract

Kolom merupakan salah satu struktur utama dari suatu bangunan. Kolom menjadi salah satu struktur dalam portal/frame yang menopang balok, seluruh beban lantai, serta beban lain yang diatasnya. Seiring perkembangan konstruksi kebutuhan akan peralihan fungsi bangunan sedang banyak dilakukan. Untuk menghindari terjadinya kolom lemah pada peralihan fungsi bangunan, diciptakan sebuah inovasi yaitu perbaikan dengan mortar jacketing. Pada penelitian ini digunakan kode kolom A5 – B5 dan A6 – B6. Yaitu, kolom retrofit kode A5 adalah kolom retrofit yang menggunakan tulangan longitudinal bambu sebanyak 4 buah dengan ukuran 10 x 10 mm dibandingkan dengan kolom retrofit kode B5 adalah kolom retrofit yang menggunakan tulangan longitudinal bambu sebanyak 8 buah dengan ukuran 10 x 5 mm dan dengan jarak tulangan transversal yang sama yaitu 7 cm. Sedangkan kolom retrofit dengan kode A6 adalah kolom retrofit yang menggunakan tulangan longitudinal bambu sebanyak 4 buah dengan ukuran 10 x 10 mm, dibandingkan dengan kolom retrofit kode B6 adalah kolom retrofit yang menggunakan tulangan longitudinal bambu sebanyak 8 buah dengan ukuran 10 x 5 mm dan dengan jarak tulangan transversal yang sama yaitu 11 cm. Hasil akhir dari penelitian ini adalah efektifitas pengekangan kolom retrofit. Pengujian kolom dilakukan menggunakan mesin uji tekan untuk memperoleh nilai gaya tekan dan dial gauge untuk memperoleh nilai defleksi. Hasil penelitian antara variasi A5 dan B5 diperoleh bahwa variasi B5 memiliki efektifitas peningkatan gaya tekan maksimum yang lebih rendah sebesar 26,27% dibandingkan variasi A5. Hal ini karena rasio tekuk yang dimiliki kolom B5 lebih kecil dibandingkan kolom A5, sehingga tulangan longitudinal variasi A5 lebih efektif dalam menahan gaya tekan aksial. Selain itu nilai kekakuan dan modulus elastisitas dari kolom retrofit B5 juga memiliki nilai yang lebih kecil masing-masing  sebesar 61,17% dan 49,79% dibandingkan kolom retrofit A5. Namun untuk nilai peningkatan daktilitas variasi B5 memiliki nilai peningkatan daktilitas yang sedikit lebih besar sebesar 0,33% dibandingkan kolom retrofit A5. Maka disimpulkan bahwa kolom retrofit B5 lebih efektif dibandingkan kolom retrofit A5. Sedangkan untuk penelitian antara variasi A6 dan B6 diperoleh bahwa variasi B6 memiliki peningkatan gaya tekan maksimum yang lebih rendah sebesar 19,02% dibandingkan variasi A6. Namun variasi B6 memiliki nilai kekakuan dan modulus elastisitas yang lebih besar masing-masing  sebesar 1,82% dan 45,43% dibandingkan kolom A6, hal ini dapat saja terjadi karena proses pencampuran material saat pengecoran tidak merata, sehingga kuat tekan dan kekakuan serta modulus elastisitas tidak berbanding lurus. Sedangkan variasi B6 memiliki efektifitas peningkatan daktilitas lebih besar sebesar 62,33% dibandingkan variasi A6. Maka disimpulkan bahwa kolom retrofit B6 lebih efektif dibandingkan kolom retrofit A6. Oleh karena itu, pada penelitian ini konfigurasi tulangan memberikan pengaruh pada efektifitas perbaikan kolom.
PENGARUH PERKUATAN MORTAR JAKET DENGAN VARIASI JARAK SENGKANG BAMBU PADA KOLOM BETON BERTULANG Muhammad Ainur Rofiq; Christin Remayanti Nainggolan; Ari Wibowo; Indradi Wijatmiko
Rekayasa Sipil Vol 13, No 1 (2019)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2019.013.01.7

Abstract

A building consists of several structural elements, one of them is a column that has the function to distribute the entire load of the building towards the foundation. If in the working process is done poorly, the column structure will fail. In addition, the structure of the building that has been established is sometimes not function appropriately based on the initial plan, so the load that works on the structure of the building can exceed limits that are previously calculated. Then, the reinforcement of the column is required to be functioned according to the previous planning. In this case, we use the retrofit column code A.5 and B.5 is a retrofit column that uses 4 pieces and 8 pieces of bamboo longitudinal with a size of 10 x 10 mm and 10 x 5 mm with a distance between 7 cm transversal reinforcement, compared to a retrofit column code A.6 and B.6 is a retrofit column that uses longitudinal reinforcement of bamboo as many as 4 pieces and 8 pieces with a size of 10 x 10 mm and 10 x 5 mm with a distance between transversal reinforcement 11 cm. The column was tested by using a compression test machine to obtain the value of the compressive force and dial gauge to obtain the deflection value. Testing of compressive strength was not carried out in the initial column, but only in the retrofit column. The results of the study between variations of A5 and A6 showed that variations in A5 had an increase in the maximum compressive force of 61.78% while variations in A6 increased by 59.86%, it is concluded that A5 was more effective than A6. Whereas for the research between variations of B5 and B6 it was found that variations in B5 had an increased maximum in compressive force of 48,51 %, it is concluded that B5 was more effective than B6.  
PENGARUH VARIASI MUTU BETON PADA BENDA UJI BALOK BETON NORMAL DENGAN MENGGUNAKAN METODE NON DESTRUCTIVE TEST Kushariyanto Kushariyanto; Christin Remayanti Nainggolan; Siti Nurlina
Rekayasa Sipil Vol 13, No 3 (2019)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2019.013.03.10

Abstract

This research aims to know the relationship of the pulse velocity to compression strength with a variation of the quality of the concrete based on the ultrasonic pulse velocity. This research uses the PUNDIT PL-200 to do the process of analysis of concrete density based on the pulse velocity from the UPV. From UPV testing in this research showed that each quality and each method has a strong connection of the same compression strength and velocity. This is indicated by rising the velocity graph as the quality of the concrete itself increases. From this research also gained comparisons between the three methods, which is between direct and semi-direct methods, direct and indirect methods, as well as semi-direct and indirect methods.
Co-Authors Amelia Kusuma Ardha Marcelita Ragil Putranti Ari Wibowo Faselsakti Ifolala Johanes Laia Fatma Dora Indriani Giovanni Hertata Oktavian Indradi Wijatmiko Kolose Albert Hutapea Kushariyanto Kushariyanto M. Ruslin Anwar Ming Narto Wijaya Muhammad Ainur Rofiq Nurmadinah Jasman Puthut Alfian Akbar Siti Nurlina Stephanus Indraswara Catur Febriarta Yatnanta Padma Devia