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Prediction the Maximum Deflection of the Prototype of Nailed-slab Pavement System Using the Allowable Equivalent Modulus of Subgrade Reaction Puri, Anas; Oktavia, Ferly; Elizar; Dharmowijoyo, Dimas B.E.; Ali, Mujahid; Liza Evianti Tanjung
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 1 (2025): Article In Press JGEET Vol 10 No 01 : March (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar

An equivalent modulus of subgrade reaction was proposed for analyzing the Nailed-slab Pavement System. This modulus is defined by accumulating the modulus of subgrade of the slab and the additional modulus of subgrade reaction which is contributed by a pile under the slab. The additional modulus can be defined by the Modified Hardiyatmo Method. The equivalent modulus of subgrade reaction only consideres a safety factor for additional modulus of subgrade reaction. In this research, a global safety factor will be considered for all modulus. This research is aimed to learn the prediction of the slab deflection by using the allowable equivalent modulus of subgrade reaction. The global safety factor was varied by 1.0; 2.0; 2.5; and 3.0. The slab deflection was calculated by using Beam on Elastic Foundation. Data of the nailed-slab and the soil were based on the previous researcher for a single pile nailed-slab model. Results show that the calculated deflection of the slab was in good agreement with the observed deflection. Increasing the global safety factor resulted in the over-estimated slab deflections. It means the design by using allowable equivalent modulus of subgrade reaction tends to result in a safety zone.

UJI SONDIR TANAH DALAM PENDAMPINGAN PERENCANAAN PEMBANGUNAN MASJID PASIR RAMBAH ROKAN TIMUR ROKAN IV KOTO ROKAN HULU Alwiah, Sy. Sarah; Puri, Anas; Zaenal Muttaqin, Muhammad; Mildawati, Roza; Haratati Dewi, Sri
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 8, No 10 (2025): MARTABE : JURNAL PENGABDIAN KEPADA MASYARAKAT
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v8i10.3843-3851

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk mendukung perencanaan pembangunan masjid melalui pelaksanaan uji sondir tanah guna memperoleh data teknis karakteristik tanah di lokasi. Uji sondir dilakukan untuk mengetahui variasi tahanan konus (qc) dan tahanan gesekan selubung (fs) terhadap kedalaman, yang menjadi dasar dalam menentukan jenis dan kedalaman pondasi yang aman dan ekonomis. Metode yang digunakan meliputi koordinasi awal dengan masyarakat dan panitia pembangunan, pelaksanaan pengujian di lapangan, analisis data, serta sosialisasi hasil kepada pihak terkait. Hasil uji menunjukkan stratifikasi tanah yang bervariasi dan mengidentifikasi lapisan tanah keras pada kedalaman tertentu yang dapat mendukung pondasi bangunan. Kegiatan ini juga meningkatkan pemahaman masyarakat mengenai pentingnya investigasi tanah sebelum pembangunan. Dengan demikian, pelaksanaan uji sondir ini berkontribusi secara langsung dalam mendukung keberhasilan pembangunan masjid yang aman, berkelanjutan, dan berbasis pada data lapangan yang akurat

Science in the Whirlwind of Religion and Power Amhar, Fahmi; Puri, Anas
Islamic Research Vol 8 No 2 (2025): Islamic Research
Publisher : Perhimpunan Intelektual Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47076/jkpis.v8i2.336

This paper examines the interactions among science, religion, and power across historical and social contexts. Science is defined as a systematic effort to build knowledge through testable explanations and predictions, while religion is a system that connects humans with supernatural and transcendental elements. Power, in this context, is understood as a social production that shapes actors' capacities, actions, and beliefs. The paper outlines a crisis of thinking and literacy among scientists, religious scholars, and politicians, who often fail to understand or disregard the relevance of other fields. Various types of relationships between power and both science and religion are described, including power that protects, suppresses, restricts, utilizes, or mediates between the two domains. Additionally, the paper discusses how religion and science can influence or even conflict with each other. Historical examples of the complex interactions between science, religion, and power are provided, showing that harmony among them can lead to progress, while imbalance can result in regression. In conclusion, Muslims need to understand and appropriately position science, religion, and power to avoid secular extremism and ensure balanced development in society.

Science in the Whirlwind of Religion and Power Amhar, Fahmi; Puri, Anas
Islamic Research Vol 8 No 2 (2025): Islamic Research
Publisher : Perhimpunan Intelektual Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47076/jkpis.v8i2.336

This paper examines the interactions among science, religion, and power across historical and social contexts. Science is defined as a systematic effort to build knowledge through testable explanations and predictions, while religion is a system that connects humans with supernatural and transcendental elements. Power, in this context, is understood as a social production that shapes actors' capacities, actions, and beliefs. The paper outlines a crisis of thinking and literacy among scientists, religious scholars, and politicians, who often fail to understand or disregard the relevance of other fields. Various types of relationships between power and both science and religion are described, including power that protects, suppresses, restricts, utilizes, or mediates between the two domains. Additionally, the paper discusses how religion and science can influence or even conflict with each other. Historical examples of the complex interactions between science, religion, and power are provided, showing that harmony among them can lead to progress, while imbalance can result in regression. In conclusion, Muslims need to understand and appropriately position science, religion, and power to avoid secular extremism and ensure balanced development in society.

Pengaruh Penggunaan Polyurethane Terhadap Sifat Fisik dan Mekanik Beton Perkerasan Kaku: The Utilization of Polyurethane Plastic Waste on the Physical and MechanicalProperties of Rigid Pavement Concrete Harianto, Hengky; Puri, Anas; Elizar; Syahminan, Mohd
JURNAL SAINTIS Vol. 25 No. 02 (2025)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/saintis.2025.vol25(02).18820

[IN] Penelitian ini mencoba memanfaatkan limbah plastik polyurethane sebagai bahan tambah pada campuran beton. Hal ini dalam upayamenambah khazanah alternatif pemanfaatan limbah plastik dalam rangka mengurangi limbah. Tujuan penelitian ini untuk mengetahuipengaruh penambahan polyurethane terhadap sifat fisik dan mekanik beton mutu rencana fc’ 36 MPa. Penelitian dilakukan melaluieksperimen di laboratorium. Sampel beton dibuat dengan variasi penambahan polyurethane 0%, 0,5% dan 1% terhadap berat campuranbeton normal. Selanjutnya campuran tersebut diuji workabilitas dan dibuat benda uji silinder dan balok beton. Benda uji dilakukan ujikuat tekan dan kuat tarik lentur pada umur 7, 14, 28 dan 56 hari. Hasil penelitian menunjukkan bahwa penambahan polyurethane tidakmemberikan pengaruh terhadap workabilitas beton. Berat isi beton rerata pada umur 28 hari berkisar antara 24,27 kN/m3 sampai 24,45kN/m3 dan berat isi beton berdasarkan benda uji balok sedikit lebih besar dibanding dari benda uji silinder. Penambahan polyurethanemenurunkan kuat tekan beton secara tidak signifikan dan masih 113% di atas kuat tekan rencana. Adapun kuat tarik lentur beton,penambahan polyurethane meningkatkan kuat tarik lentur beton cukup signifikan mencapai 26% pada penambahan 1% polyurethane dan28% pada penambahan 0,5% polyurethane. Persentase optimum polyurethane terhadap campuran beton dalam penelitian ini adalah 0,5%. [EN] This study tries to utilize polyurethane plastic waste as an additive in concrete mixtures. This is in an effort to add to the treasure ofalternative use of plastic waste to reduce waste. The aims of this study is to determine the effect of the addition of polyurethane on the physicaland mechanical properties of concrete for the design quality of the fc' 36 MPa. The research was conducted through experiments in thelaboratory. Concrete samples were made with variations in the addition of 0%, 0.5% and 1% polyurethane to the weight of normal concretemixture. The mixture was tested for workability and made a test piece for concrete cylinders and concrete blocks. The test pieces were testedfor compressive strength and flexural strength at the age of 7, 14, 28 and 56 days. The results showed that the addition of polyurethane did notaffect the workability of concrete. The average weight of concrete content at 28 days of age ranges from 24.45 kN/m3 to 24.27 kN/m3 and theweight of concrete content based on the block test piece is slightly larger than that of the cylinder test piece. The addition of polyurethanedecreases the compressive strength of concrete insignificantly and is still 113% above the planned compressive strength. As for the flexuralstrength of concrete, the addition of polyurethane significantly increases the flexural strength of concrete reaching 26% at the addition of 1%polyurethane and 28% at the addition of 0.5% polyurethane. The optimum percentage of polyurethane to concrete mixture in this study was 0.5%.

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