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STUDI KOMPARATIF KERUSAKAN BETON PADA STRUKTUR KOLOM YANG KEROPOS DENGAN METODE GROUTING Hariati Pratiwi; Yayuk Setyaning Astutik; Usmanul Hayadi Umar
Journal of Civil Engineering and Planning (JCEP) Vol 1 No 2 (2020)
Publisher : Program Studi Sarjana Teknik Sipil Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37253/jcep.v1i2.725

Concrete is a material widely used in construction projects. The quality of concrete is strongly influenced by some of its constituent materials such as water, cement, coarse aggregates, fine aggregates and other additives. In the implementation of construction using concrete, there is a great deal of damage to concrete materials, one of which is porous or with other names voids (cavities or holes). Therefore, repair methods used for occurring damage in concrete are needed. This study used a 15cmx15cmx15cm cube-shaped concrete sample divided into three samples, namely 6 cubes of normal concrete, 6 cubes of concrete made intentionally porous with grouting method using Sikagrout215, and concrete which was intentionally made porous with a method of grouting using a mixture of cement and water (cement paste) 6 cubes. Each cube were tested its compressive strength at the stage of 7, 21 and 28 days. The results showed that the cause of porous concrete was caused by several factors including cement water factor, lack of compaction process, the aggregate ratio used, and poor workability. Concrete compressive strength results at 28 days showed that the compressive strength of normal concrete was 230,459 kg / cm², concrete grouting with 215 cycles of 318,532 kg / cm², and grouting concrete with a mixture of cement and water 316,707 kg / cm². Grouting concrete using 215 cycles has the largest value among the three samples. Hence, in this study the grouting method is the right choice to make porous concrete repaired. Keywords: porous concrete, grouting, concrete compressive strength, column, structure

TEKNIK ESTIMASI PARAMETER DAN KOMPONEN ERROR PADA DATA PANEL TIDAK LENGKAP DENGAN METODE FEASIBLE GENERALIZED LEAST SQUARE (FGLS) Yayuk Setyaning Astutik
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 4 No 1 (2018): Unisda Journal of Mathematics and Computer Science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Unbalanced panel data classified in fixed effect and random effect with one-way and two-way. Dummy variable used to determine differences the intercept on the classification individual or time units with assuming the intercept varies between individuals and time, whereas the slope is constant. For the random effects, differences in characteristics individual and time accommodated on the error component model with unknown error covariance matrix. The method used for one-way is Feasible Generalized Least Square (FGLS). Modifications ANOVA by Wallace and Hussain used for variance component estimation on the error covariance matrix. Components Estimation of variance on the error covariance matrix using the OLS residuals as components of quadratic forms and equating to expectations. In this case study the factors that affect cash dividend represented by ROI, Cash Ratio, Current Ratio, Debt Total Assets, Earning Per Share, Debt Equity Ratio and Dividend Payout Ratio in the period 2012-2017 with 36 of consumer goods manufacturing company in IDX.

Analisa Struktur Balok dengan Metode Momen (Studi Kasus: Proyek Pembangunan Grand Mall Batam) Yayuk Setyaning Astutik
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 4 No 2 (2018): Unisda Journal of Mathematics and Computer Science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

The Grand Mall Batam Development Project with number of stories 30 and 1 basement. Footing Plan of this project using bore pile. Observations are made at the project construction site for data collection for 3 months in 2018. The beams used are dimensins of B350 x 750 dimensions with a top reinforcement of 6D20 mm, 2D12 mm for center reinforcement, 3D20 mm for bottom reinforcement and D10-200 mm for diameter distance. The calculation of the beam starts with the planning data on the beam structure analysis, namely Concrete Quality 29 Mpa (K-350), Screw 500 Mpa and Plain Iron 260 Mpa. The loading on the beam is carried out in the field that work, the child beam and the main beam with details of dead load, live load, factored load. On the main reinforcement of the beam, the moment is calculated, namely the moment of the field, the moment of support and the moment of the plan. Based on the calculation of loading on the beam, the deflection value is 0.01709 m. Calculation of stirrup reinforcement on the beam where the required distance is 254.0073 mm and a distance of 200 mm is taken with an iron diameter of 10 mm. So the calculation of the main reinforcement of beam and stirrup reinforcement is in the Safe category.

Analisa Penumpang dengan Metode SARIMA (Studi Kasus: Bandar Udara Raja Haji Fisabilillah) Yayuk Setyaning Astutik
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 5 No 2 (2019): Unisda Journal of Mathematics and Computer science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Raja Haji Fisabilillah International Airport is an airport in Tanjungpinang and it is quite high in service levels for the flow of passengers and goods. Based on the data from Airport Quality Angkasa Pura II, the passengers growth has both decreased and increased in the last 3 (three) years. In 2015, there were 258,936 people in total and has decreased to 246,828 people in 2016 and increased again in 2017 by 351,688 people. Therefore, it is necessary to evaluate the terminal of Raja Haji Fisabilillah International Airport. The methods used are observation and forecasting using the SARIMA. The evaluation and analysis results show that the terminal of Raja Haji Fisabilillah International Airport still meets the applicable standards and passenger movements for the next year 2020 indicate that all equipment facilities for the needs of terminal passengers of Raja Haji Fisabilillah International Airport are still adequate.

Analisa Penumpang dengan Metode SARIMA (Studi Kasus: Bandar Udara Raja Haji Fisabilillah) Yayuk Setyaning Astutik
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 5 No 01 (2019): Unisda Journal of Mathematics and Computer Science (UJMC)
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Abstract, Raja Haji Fisabilillah International Airport is an airport in Tanjungpinang and it is quite high in service levels for the flow of passengers and goods. Based on the data from Airport Quality Angkasa Pura II, the passengers growth has both decreased and increased in the last 3 (three) years. In 2015, there were 258,936 people in total and has decreased to 246,828 people in 2016 and increased again in 2017 by 351,688 people. Therefore, it is necessary to evaluate the terminal of the airport. The methods are used observation and forecasting is SARIMA. The evaluation and analysis results show that terminal of this airport still meet the applicable standards and passenger movements for the next year 2020 indicate that all equipment facilities for the needs of terminal passengers of Raja Haji Fisabilillah International Airport are still adequate. Keywords: SARIMA, Forecasting, Passenger, Airport. Abstrak, Bandar Udara Internasional Raja Haji Fisabilillah merupakan bandar udara yang ada di Kota Tanjungpinang dan merupakan bandara yang cukup tinggi dalam tingkat pelayanan terhadap arus penumpang maupun barang. Berdasarkan data dari Airport Quality Angkasa Pura II bahwa pertumbuhan penumpang mengalami penurunan dan peningkatan dalam 3 (tiga) tahun terakhir, tercatat data tahun 2015 sebanyak 258.936 orang, tahun 2016 menurun menjadi 246.828 orang dan meningkat kembali di tahun 2017 sebanyak 351.688 orang. Maka diperlukan evaluasi terhadap terminal penumpang dari bandara ini. Metode yang digunakan adalah observasi dan peramalan dengan SARIMA. Hasil evaluasi dan analisis menunjukkan bahwa terminal penumpang Bandar Udara Internasional Raja Haji Fisabilillah masih memenuhi standar dan syarat yang berlaku dan pergerakan penumpang untuk tahun mendatang 2020 menunjukkan seluruh fasilitas peralatan pelayanan kebutuhan terminal penumpang Bandar Udara Internasional Raja Haji Fisabilillah masih memadai. Kata kunci: SARIMA, Peramalan, Penumpang, Bandara.

STUDI KOMPARATIF KERUSAKAN BETON PADA STRUKTUR KOLOM YANG KEROPOS DENGAN METODE GROUTING Hariati Pratiwi; Yayuk Setyaning Astutik; Usmanul Hayadi Umar
Journal of Civil Engineering and Planning (JCEP) Vol. 1 No. 2 (2020)
Publisher : Program Studi Sarjana Teknik Sipil Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37253/jcep.v1i2.725

Concrete is a material widely used in construction projects. The quality of concrete is strongly influenced by some of its constituent materials such as water, cement, coarse aggregates, fine aggregates and other additives. In the implementation of construction using concrete, there is a great deal of damage to concrete materials, one of which is porous or with other names voids (cavities or holes). Therefore, repair methods used for occurring damage in concrete are needed. This study used a 15cmx15cmx15cm cube-shaped concrete sample divided into three samples, namely 6 cubes of normal concrete, 6 cubes of concrete made intentionally porous with grouting method using Sikagrout215, and concrete which was intentionally made porous with a method of grouting using a mixture of cement and water (cement paste) 6 cubes. Each cube were tested its compressive strength at the stage of 7, 21 and 28 days. The results showed that the cause of porous concrete was caused by several factors including cement water factor, lack of compaction process, the aggregate ratio used, and poor workability. Concrete compressive strength results at 28 days showed that the compressive strength of normal concrete was 230,459 kg / cmÂ², concrete grouting with 215 cycles of 318,532 kg / cmÂ², and grouting concrete with a mixture of cement and water 316,707 kg / cmÂ². Grouting concrete using 215 cycles has the largest value among the three samples. Hence, in this study the grouting method is the right choice to make porous concrete repaired. Keywords: porous concrete, grouting, concrete compressive strength, column, structure

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