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All Journal International Conference on Coastal and Delta Areas JITEK (Jurnal Ilmiah Teknosains) Jurnal DISPROTEK Neo Teknika: Jurnal Ilmiah Teknologi Jurnal Teknik Sipil Jurnal Civil Engineering Study
Fatchur Roehman
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation Veterinary Other

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Alternatif Penanganan Stabilitas Timbunan dan Lereng pada Oprit Jembatan dengan Mortar Busa (Studi Kasus : JU Rel KA Cibitung – Cilincing) Annissa Yoga Prastika; Wahyu Febriyanto; Dewi Indriyana; Bagas Wahyu Adhi; Fatchur Roehman; Faqih, Nasyiin
Jurnal Civil Engineering Study Vol. 5 No. 01 (2025): Jurnal Civil Engineering Study
Publisher : Civil Engineering of Universitas Islam Nahdlatul Ulama Jepara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34001/ces.v5i01.1286

Abstract

Soft soil is caused by cohesion, a low internal friction angle and high compressibility. If not recognized and investigated it can cause instability and long-term decline that cannot be tolerated. One of the treatments that occurs in soft soil is light backfilling with foam mortar. The aim of this research is to carry out an analysis of the stability of embankments using lightweight materials at the location of bridge embankments in order to predict how much of an impact there will be in reducing settlement and increasing embankment stability. Analysis was carried out using the Finite Element Method with the help of the Plaxis 2D program. The method used in this research is descriptive qualitative, namely research by collecting primary and secondary data from the parameters and variables studied and then analyzing them to draw conclusions. In the results of the analysis using Plaxis Softwere using foam mortar treatment with an embankment slope of 1: 1.5, the results showed that the decline in 1 year was 4 cm (meeting the design criteria), the decline in 10 years was 2.8 cm (meeting the design criteria), apart from that the safety factor using foam mortar was also greater than the design criteria, which means the stability of the slope is safe.
REVIEW PEMANFAATAN SAMPAH PLASTIK UNTUK ENERGI DAN BAHAN KONSTRUKSI Qomaruddin, Mochammad; Tristan, Alfian; Faqih, Nasyiin; Roehman, Fatchur; Mushthofa, Mushthofa
JITEK (Jurnal Ilmiah Teknosains) Vol 10, No 2/Nov (2024): Jitek
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jitek.v10i2/Nov.20048

Abstract

The problem of plastic waste has become a global concern due to its negative impact on the environment. Plastic, as a non-biodegradable material, results in significant pollution of soil and water. As plastic production increases, efforts to find innovative solutions in reducing environmental impact are important. This article discusses the use of plastic waste as an alternative energy source and construction material. Using a liter-tour review method from various sources that explores the potential of plastics to be converted into energy as well as their use in building materials and as aggregates in concrete. The results of the analysis show that the use of plastic waste can not only reduce pollution, but also provide economic and social benefits, especially as fuel oil and building materials such as paving plastic, plastic aggregate, asphalt plastic mixture. 
Analisa Hubungan Grading Agregat Terhadap Kuat Tekan Dan Porositas Beton Porous Geopolimer Darmoko, Wahyu Setyo; Qomaruddin, Mochammad; Saputro, Yayan Adi; Rochmanto, Decky; Roehman, Fatchur; Faqih, Nasyiin
Jurnal Teknik Sipil Vol. 18 No. 1 (2025): Juni 2025
Publisher : Faculty Of Engineering University 17 August 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/g8nqmc61

Abstract

This research is an experimental study on porous concrete and the use of fly ash as a binder for concrete to analyze the effect of compressive strength and porosity. The research method used in this study is the experimental method which is a research method used to find the effect of certain treatments on concrete. In this research, the concrete mix design uses a ratio of gravel and geopolymer paste as a binder, namely 4: 1 and uses a molarity ratio of 10M with differences in grading of coarse aggregate using sieves number 4, 1/2 ", and 3/8". The optimum compressive strength value was obtained in mix design 1 using sieve gradation no.4 which was 4.25 MPa at 28 days old. While the results of the highest porosity value were found in mix design 1 which was 7.15% at 28 days old
CORRELATION STUDY BETWEEN UPV AND HAMMER TEST IN DETERMINING THE FUNCTIONAL SUITABILITY OF BUILDING STRUCTURES Robandi, Fathur Rohman; Roesdiana, Tira; Hidayat, Arif; Roehman, Fatchur
Jurnal Disprotek Vol 16, No 2 (2025)
Publisher : Universitas Islam Nahdlatul Ulama Jepara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34001/jdpt.v16i2.8575

Abstract

Buildings that have been in use for a long time should be inspected regularly to ensure that they are safe to use and robust. In the field, visual inspections are often performed on parts of structures such as columns, beams, and plates. Measurement of the propagation time of ultrasonic pulses in concrete and relate it to the quality and strength of the material. A weak positive correlation is shown with a multiple value of R 0.324475. Every 1 m/s increase in the UPV value will increase the Hammer Test result by 0.00755 MPa. However, this relationship is weak because the UPV only accounts for 10.5% of the change in the Hammer Test results. The ultrasonic wave speed and the bounce result of the hammer can be affected by uneven concrete, such as the presence of cavities, material separation, or large gravel. This condition can also be seen during visual examination. STUDI KORELASI ANTARA UPV DAN HAMMER TEST DALAM MENENTUKAN LAIK FUNGSI STRUKTUR BANGUNANBangunan yang telah digunakan dalam jangka waktu lama harus diperiksa secara berkala untuk memastikan bahwa bangunan tersebut aman digunakan dan memiliki ketahanan yang baik. Di lapangan, pemeriksaan visual sering dilakukan pada bagian-bagian struktur seperti kolom, balok, dan pelat. Pengukuran waktu rambat gelombang ultrasonik dalam beton digunakan untuk menghubungkan nilai tersebut dengan kualitas dan kekuatan material. Hasil menunjukkan adanya korelasi positif yang lemah dengan nilai R sebesar 0,324475. Setiap kenaikan 1 m/s pada nilai UPV akan meningkatkan hasil Hammer Test sebesar 0,00755 MPa. Namun, hubungan ini tergolong lemah karena UPV hanya menjelaskan 10,5% dari perubahan hasil Hammer Test. Kecepatan gelombang ultrasonik dan hasil pantulan hammer dapat dipengaruhi oleh ketidakrataan beton, seperti adanya rongga, pemisahan material, atau kerikil besar. Kondisi ini juga dapat diamati melalui pemeriksaan visual.
Co-Authors Annissa Yoga Prastika Arif Hidayat Bagas Wahyu Adhi, Bagas Wahyu Candrasasi, Dian Darmoko, Wahyu Setyo Decky Rochmanto, Decky Dewi Indriyana Dian Chandrasasi Faqih, Nasyiin Herlambang, Sigit Ilham Putra INDRIANI, YULIA Kartono Wibowo, Kartono khoirul mahfidh, muhammad Munawaroh, Siti Rohmatul Nastain Qolbi, Muhammad Ainun Qomaruddin, Mochammad Robandi, Fathur Rohman Saputro, Yayan Adi Tira Roesdiana Tristan, Alfian Wahyu Febriyanto Yuli Sulistyowati