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All Journal Media Teknik Sipil Rekayasa Sipil Teknisia Journal of Science and Applicative Technology RACIC : Rab Construction Research JITTER (Jurnal Ilmiah Teknologi Informasi Terapan) Jurnal Proyek Teknik Sipil Jurnal Rekayasa Sipil JMTS: Jurnal Mitra Teknik Sipil G-Tech : Jurnal Teknologi Terapan Journal of Civil Engineering and Planning (JCEP) Nusantara Hasana Journal STATIKA: Jurnal Teknik Sipil Jurnal Pengabdian Masyarakat Bhinneka Jurnal Pengabdian Masyarakat Bangsa Kohesi: Jurnal Sains dan Teknologi TeknoKreatif: Jurnal Pengabdian kepada Masyarakat
Ahmad Yudi
Civil Engineering Department, Institut Teknologi Sumatera, South Lampung, Lampung Province, Indonesia
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Superstructure Design of PCI Girder Bridge (Case Study: Bridge Project in Padang Pariaman, West Sumatera) Ahmad Yudi; Fadhilah Ramadhan; Kirtinanda P. Kirtinanda P.; Arif Rahman Hakim Sitepu
G-Tech: Jurnal Teknologi Terapan Vol 9 No 3 (2025): G-Tech, Vol. 9 No. 3 July 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v9i3.7224

Abstract

This study was conducted in response to the damage of the Padang Pariaman Bridge, which had exceeded its service life, further worsened by a flood disaster in 2023 in Padang Pariaman, West Sumatra.  The bridge redesign in this study adopts a PCI Girder type with a span of 35 meters. Load calculations refer to SNI 1725:2016, and structural analysis was carried out using MIDAS Civil software. The bridge design follows the AASHTO LRFD 2007 standards, covering the determination of the number and layout of tendons, loss of prestress analysis, concrete stress evaluation, deflection checks, and shear capacity design. The design results in this study serve as a redesign of the damaged bridge in Padang Pariaman, with adjustments made to the load combinations and response spectrum parameters specific to the region. The analysis results indicate the use of PCI Girder type H-170 with 64 strands divided into 4 tendons. A total prestress loss of 17.94% or 333.77 MPa occurred at midspan. The concrete section stresses remain below the limits specified in the standards, ensuring the section is safe from cracking. Additionally, deflection caused by the combination of vehicle and service loads remains within permissible limits. The bridge design also requires shear reinforcement with D13-200 specifications.
A ANALYSIS OF THE EFFECT OF THE USE OF HVS PAPER WASTE ASH AS A PARTIAL SUBSTITUTION OF CEMENT ON THE COMPRESSIVE STRENGTH OF CONCRETE: ANALISIS PENGARUH PENGGUNAAN ABU LIMBAH KERTAS HVS SEBAGAI SUBTITUSI SEBAGIAN SEMEN TERHADAP KUAT TEKAN BETON Mohammad Fiqry Teezar pratama; Ahmad yudi; Kirtinanda P
Jurnal Ilmiah Teknologi Infomasi Terapan Vol. 11 No. 3 (2025)
Publisher : Universitas Widyatama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33197/jitter.vol11.iss3.2025.2585

Abstract

This research aims to analyze the use of HVS paper ash (Hout vrij schrijfpapier) as a substitute for cement in concrete mixtures. HVS paper is one of the most widely used wastes by humans, generally used in government, private, and school agencies. This research aims to evaluate the slump value, assess the concrete compressive strength value, analyze the impact of using paper ash on concrete compressive strength using the ANOVA (Analysis of Variance) method, and study the type of cracks in each concrete sample based on ASTM C39-18 standards. The variations used were 0%, 10%, 15%, and 20% as cement substitution. The average compressive strength of each sample was 20.2 MPa, 23.3 MPa, 20.4 MPa, and 18.3 MPa, respectively. This increase occurred because paper ash has a higher silica content compared to Portland cement. However, the use of paper ash requires an activator to accelerate the mechanical properties of the paper ash itself. The activator used in this research is NaOH with a level of 4 mol. Thus, the increase in compressive strength produced by paper ash can be used as normal concrete.
PEMANFAATAN LIMBAH FLY ASH DAN ZEOLITE PADA AKTIVASI KIMIA DENGAN TAMBAHAN SUPERPLASTICIZER SEBAGAI BAHAN PENGGANTI SEMEN PADA BETON GEOPOLYMER Siska Apriwelni; Ahmad Yudi; Nugraha Bintang Wirawan; Kirtinanda P; Muhammad Abi Berkah Nadi; Siti Rahma; Hendrawan Hendrawan
Racic : Rab Construction Research Vol. 10 No. 2 (2025): DESEMBER
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v10i2.7331

Abstract

The increasing production of Portland cement contributes significantly to global warming; therefore, the utilization of Fly Ash waste and natural Zeolite as alternative binders in concrete production is worth considering. This research was conducted experimentally using class F Fly Ash as the primary binder with Natural Zeolite substitutions of 0%, 5%, 10%, 15%, and 20%. The activators employed were NaOH 10M and Na₂SiO₃ with a ratio of 1:2 for Fly Ash, and NaOH 1M and HCl 1M for Zeolite. Tests included compressive strength, unit weight, and slump test on cylindrical specimens cured for 28 days. The results showed that a 15% Zeolite substitution achieved the optimum compressive strength of 34.80 MPa (NaOH 1M) and 33.74 MPa (HCl 1M), representing a 28.13% and 24.22% increase compared to GPC NZ 0%. The unit weight of geopolymer concrete was generally lower than that of normal concrete but increased with higher Zeolite content. In terms of cost, geopolymer concrete was 36.51% more expensive than normal concrete; however, its improved mechanical performance and physical properties make the Fly Ash–Zeolite combination a viable and environmentally friendly binder alternative
ANALISIS PEMANFAATAN TEMPURUNG KELAPA SEBAGAI AGREGAT HALUS PADA BETON GEOPOLIMER BERBASIS FLY ASH: ANALISIS PEMANFAATAN TEMPURUNG KELAPA SEBAGAI AGREGAT HALUS PADA BETON GEOPOLIMER BERBASIS FLY ASH Ahmad Yudi; Sephia Melanie Syahri; Kirtinanda P; Ayu Sinta Aprilia; Anggarani Budi Ribowo
STATIKA: Jurnal Teknik Sipil Vol. 10 No. 2 (2024): STATIKA : JURNAL TEKNIK SIPIL
Publisher : Politeknik Raflesia Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53494/jts.v10i2.710

Abstract

Beton sebagai material konstruksi mengalami peningkatan permintaan dan pada daerah tertentu yang memiliki keterbatasan material untuk mendapatkan material seperti pasir dan semen. Untuk itu limbah tempurung kelapa dapat digunakan sebagai alternatif bahan material untuk campuran beton, karena produksi dari perkebunan kelapa nasional mencapai 2,85 juta ton lebih serta konsumsi kelapa terus meningkat tiap tahunnya. Selain itu dapat memanfaatkan abu terbang (fly ash) sebagai pengganti semen,yang merupakan limbah dari pembakaran batu bara. Tempurung kelapa dapat dimanfaatakan sebagai bahan tambah pada campuran beton dengan harapan menghasilkan beton yang memiliki kuat tekan yang diinginkan dengan cara tempurung kelapa yang sudah melalui pembakaran menjadi arang kemudian dihaluskan. Tujuan penelitian yaitu untuk mengetahui pengaruh tempurung kelapa sebagai agregat halus pada beton geopolimer berbasis abu terbang (fly ash). Metode penelitian pada penelitian ini yaitu eksperimental dalam data kuantitatif. Variasi substitusi tempurung kelapa sebagai agregat halus sebesar 0%, 3%, 5%, dan 7% dari berat agregat serta penggunaan alkali aktivator yaitu NaOH dan Na2SiO3 pada campuran beton geopolimer dengan perbandingan 1:2,5. Benda uji yang digunakan berbentuk silinder dengan ukuran diameter 100 mm dan tinggi 200 mm. Sampel pada tiap variasi berjumlah 3 sampel. Metode curing dilakukan dengan oven yang memiliki suhu sebesar 90°C dalam waktu 24 jam kemudian dengan suhu ruang dan pada umur beton 7 hari akan dilakukan pengujian kuat tekan. Hasil pengujian yang didapatkan yaitu nilai slump 0 mm pada tiap variasi, berat volume optimum didapatkan pada variasi 3% sebesar 2069,43 kg/m3 serta kuat tekan optimum pada variasi 0% sebesar 18,37 MPa.
ANALISA PENGARUH PENGGUNAAAN KERTAS HVS SEBAGAI SUBSTITUSI AGREGAT HALUS PADA CAMPURAN BETON: ANALISA PENGARUH PENGGUNAAAN KERTAS HVS SEBAGAI SUBSTITUSI AGREGAT HALUS PADA CAMPURAN BETON ayu Sinta Aprilia; Rawid Panji Asmara; Kirtinanda P; Ahmad Yudi; Arif Rahman Hakim Sitepu; Putri Ayu Dwiyana; Ayu Kamila Khanza; Miskar Maini; Bernaditha Catur Marina
STATIKA: Jurnal Teknik Sipil Vol. 10 No. 2 (2024): STATIKA : JURNAL TEKNIK SIPIL
Publisher : Politeknik Raflesia Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53494/jts.v10i2.712

Abstract

Penelitian ini bertujuan mengatasi masalah lingkungan akibat limbah kertas sekaligus mencari alternatif material ramah lingkungan dalam konstruksi dengan mengkaji pemanfaatan limbah kertas sebagai subtitusi agregat halus pada beton. Substitusi limbah kertas dilakukan dengan variasi 2%, 5%, dan 7,5%, dan hasil menunjukkan bahwa kuat tekan beton menurun seiring peningkatan substitusi kertas, dengan nilai berturut-turut 20,18 MPa, 19,05 MPa, 18,30 MPa, dan 17 MPa. Penurunan ini terjadi karena kertas menyerap air yang dibutuhkan dalam hidrasi semen. Meskipun demikian, beton dengan substitusi kertas HVS pada variasi yang digunakan masih dapat diaplikasikan untuk beton non-struktural dan struktural ringan. Penggunaan limbah kertas dalam variasi tersebut mampu mengurangi limbah kertas masing-masing sebesar 3,380 kg/m³, 8,449 kg/m³, dan 12,673 kg/m³, serta menawarkan alternatif material yang lebih ramah lingkungan.
Co-Authors Achmad Trie Mashuri Ade Prayoga Nasution Alexander, Rionaldo Alfinna Mahya Ummati Alfinna Mahya Ummati, Alfinna Mahya Amantawidya Durratul Hikmah Andrew Andonia First Purba Andry Yuliyanto Anggarani Budi Ribowo Annida Evilia Miranda Anthony Costa Aprilia, Ayu Sinta Apriwelni, Siska Ayu Kamila Khanza Ayu Sinta Aprilia Ayu Sinta Aprilia Ayu Sinta Aprilia Ayudia Hardiyani Kiranaratri Bayzoni M.T. Bernaditha Catur Marina Budi Ribowo, Anggarani Cahyo Agung Saputra Casha, Ade Rahman Chevin Gerhard Edward Riyadi Irawan Ekaputra, Reza Asriandi Fadhilah Ramadhan Fadillah Sabri Fathurrahman, Arif Fauzan Ahmad Sayed Fitriana, Indri Rahmandhani Galih Rio Prayogi Hendrawan Hendrawan Ilpandari, Ilpandari Julita Hayati Junita Eka Susanti Kartinanda P. Khanza, Ayu Kamila Kirtinanda P Kirtinanda P. Kirtinanda P. Laia, Nur Azizah Putri Dewi M Gilang Indra Mardika M. Abi Berkah Nadi Marina, Bernaditha Catur Michael Michael Miskar Maini Mohammad Fiqry Teezar pratama Mohammad Ihsan Firmansyah Nadi, Muhammad Abi Berkah Nadi, Muhammad Abi Berkah Nugraha Bintang Wirawan Nugraha Bintang Wirawan P Kirtinanda Prasetya, Muhammad Alif Arya Putri Ayu Dwiyana Putri Ayu Dwiyana Rahmat Kurniawan Rawid Panji Asmara Rijuli Nadaek Sayed Ahmad Fauzan Sephia Melanie Syahri Sihombing, Tera Melya Patrice Sitepu, Arif Rahman Hakim Siti Rahma Siti Rahma Siti Rahma Siti Rahma Syahidus Syuhada Tambunan, Hermon Frederik Tri Permana, Rizal Yudi, Ahmad Zhafira, Elian