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hamkah, hamkah
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Pengaruh Penambahan Abu Sekam Padi Terhadap Kuat Tekan Beton Hamkah Hamkah; Alila Alila; Abraham Tuanakotta; Betheny Amahoru
Jurnal Teknik Sipil dan Teknologi Konstruksi Vol 11, No 2 (2025): JURNAL TEKNIK SIPIL DAN TEKNOLOGI KONSTRUKSI
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jts-utu.v11i2.13646

Abstract

Agricultural waste is waste derived from agricultural production, such ash, produced from combustion, has high pozzolanic properties due to its silica content and can be founf in areas with extensive rice fields village, kairatu district, wets seram regency, maluku. the method used is an experimental method in the laboratory using a partial cement substutute in the form of rice husk ash with varying dosages of 0%, 5%, 10% and 15% of the amount of cement tested at the ages of 7 and 28 days. the results of the study found that there was a decrease in pressure strength. the more percentage of rice husk ash used, the more the compressive strength of concrete decreases compared to normal concrete 0% (19.1 mpa), concrete with asp 5% (15.3 mpa) decreases by 19.9%, concrete with asp 10% (13.0 mpa) decreases by 31.9%, and the decrease for concrete with asp 15% (12.1 mpa) is 36.6% of normal concrete and rice husk ash to the slump, which is an increase in slump value. the slump value on normal concrete is 7.5 cm, concrete with an asp of 5% (9.5 cm) experiences a percentage increase in slump value of 26.7%, concrete with an asp of 10% (10cm) of 33.3% and concrete with an asp of 15% (11 cm) experiences a percentage increase of 46.7% from normal concrete.
DAYA DUKUNG FONDASI TIANG BOR PADA ABUTMEN JEMBATAN WAI RAHWAEN DI PULAU BURU PROVINSI MALUKU Hamkah Hamkah; Enjelita Paais; Godfried Lewakabessy; David Daniel Marthin Huwae; Sjafrudin Latar; Sulastri Kakaly
Jurnal HPJI (Himpunan Pengembangan Jalan Indonesia) Vol. 12 No. 1 (2026)
Publisher : Himpunan Pengembangan Jalan Indonesia (HPJI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/jhpji.v12i1.10034.67-80

Abstract

Abstract The foundation is the most crucial element of a bridge structure, as it plays a role in supporting the load and transmitting it to the harder soil layers. The Wai Rahwaen Bridge, located on Buru Island, Maluku Province, was built using bored pile foundations, to provide effective bearing capacity for the structure above it. The analysis of the foundation bearing capacity in this study was conducted using a pre- and post-installation approach. This is very important to ensure that the foundation can support the stability of the appropriate abutment load. Before the foundation was installed, the foundation bearing capacity was estimated based on data from 2 points from the Standard Penetration Test and using 2 empirical methods, namely the Reese and Wright Method and the Reese and O'Neill Method. After the foundation was installed, the foundation bearing capacity was determined using data from 4 points from the Pile Driving Analyzer test. The Reese and Wright Method produced an ultimate bearing capacity of 272.5 tons, while the Reese and O'Neill Method produced an ultimate bearing capacity of 309.4 tons. After the foundation was installed, the ultimate bearing capacity determined based on Pile Driving Analyzer test data was 316.2 tons. This study shows that the Reese and Wright Method and the Reese and O'Neill Method produced estimates of the ultimate bearing capacity of a single pile by 13.8% and 2.2%, respectively, when compared to the ultimate bearing capacity obtained using the Pile Driving Analyzer test results. Keywords: foundation; bridge structure; bearing capacity; bored pile foundation; bridge abutment Abstrak Fondasi merupakan elemen paling krusial dari struktur jembatan, karena fondasi berperan menahan beban dan meneruskan beban tersebut ke lapisan tanah yang lebih keras. Jembatan Wai Rahwaen, yang terletak di Pulau Buru, Provinsi Maluku, dibangun dengan menggunakan fondasi tiang bor, untuk memberikan daya dukung yang efektif bagi struktur di atasnya. Analisis daya dukung fondasi pada studi ini dilakukan dengan pendekatan sebelum dan setelah pemasangan fondasi. Hal ini sangat penting untuk dilakukan, untuk memastikan bahwa fondasi itu dapat menopang stabilitas beban abutmen yang sesuai. Sebelum fondasi dipasang, daya dukung fondasi diestimasi berdasarkan data 2 titik hasil uji Standard Penetration Test serta menggunakan 2 metode empiris, yaitu Metode Reese and Wright dan Metode Reese and O’Neill. Setelah fondasi terpasang, daya dukung fondasi ditentukan dengan menggunakan data 4 titik hasil uji Pile Driving Analyzer. Metode Reese and Wright menghasilkan daya dukung ultimit fondasi sebesar 272,5 ton, sedangkan Metode Reese and O’Neill menghasilkan daya dukung ultimit sebesar 309,4 ton. Setelah fondasi terpasang daya dukung ultimit yang ditentukan berdasarkan data uji Pile Driving Analyzer adalah sebesar 316,2 ton. Studi ini menunjukkan bahwa Metode Reese dan Wright serta Metode Reese dan O’Neill menghasilkan nilai estimasi daya dukung ultimate tiang tunggal yang lebih rendah, masing-masing 13,8% dan 2,2%, bila dibandingkan dengan daya dukung ultimate yang dihasilkan dengan menggunakan hasil uji Pile Driving Analyzer Kata-kata kunci: fondasi; struktur jembatan; daya dukung; fondasi tiang bor; abutmen jembatan
EVALUASI KINERJA BETON SEMPROT STRUKTURAL PADA LERENG AKSES JALAN MASUK BENDUNGAN WAY APU Hamkah; Arifah Kurnia Nazwah Syafei; Juvrianto Chrissunday Jakob
Jurnal HPJI (Himpunan Pengembangan Jalan Indonesia) Vol. 12 No. 2 (2026)
Publisher : Himpunan Pengembangan Jalan Indonesia (HPJI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/jhpji.v12i2.10731.125-136

Abstract

Abstract Road infrastructure faces slope stability risks along its alignment due to high rainfall. Shotcrete structures offer potential as a surface layer to enhance slope stability. In this study, shotcrete was utilized for slope protection on the access road to the Way Apu Dam, located in Buru Regency, Maluku Province. The research evaluated the raw materials for the shotcrete mix and assessed the performance of the mix when used as a slope protection structure for the dam's access road. Test results confirmed that all materials used in the study met the applicable specifications. The study demonstrates that shotcrete serves as an effective alternative method for slope protec-tion, supporting the stability of the access road to the Way Apu Dam and similar infrastructure in hilly terrain. Furthermore, the research indicates that the SNI 03-2834-2002 method is suitable for designing shotcrete mix proportions. Keywords: shotcrete; slope stability; surface layer; slope protection; concrete mix Abstrak Infrastruktur jalan mempunyai risiko terhadap kestabilan lereng di sepanjang lintasan yang disebabkan oleh curah hujan tinggi. Struktur beton semprot berpotensi untuk digunakan sebagai lapisan permukaan untuk meningkatkan kestabilan lereng tersebut. Pada studi ini, beton semprot digunakan sebagai proteksi lereng pada jalan akses menuju Bendungan Way Apu, yang terletak di Kabupaten Buru, Provinsi Maluku. Pada penelitian ini dievaluasi bahan baku untuk membuat suatu campuran beton semprot dan dikaji kinerja campuran beton semprot yang digunakan sebagai struktur proteksi lereng jalan akses menuju Bendungan Way Apu. Berdasar-kan pengujian yang dilakukan, semua material yang digunakan pada penelitian ini dinyatakan memenuhi spesi-fikasi yang digunakan. Studi ini menunjukkan bahwa beton semprot dapat dijadikan salah satu alternatif metode proteksi lereng yang efektif, untuk mendukung kestabilan akses jalan menuju Bendungan Way Apu dan infra-struktur sejenis di wilayah perbukitan. Selain itu, penelitian ini menunjukkan bahwa metode SNI 03-2834-2002 dapat digunakan untuk merancang rumusan campuran beton semprot. Kata-kata kunci: beton semprot; kestabilan lereng; lapisan permukaan; proteksi lereng; campuran beton
Co-Authors Abdul Hakim Junaid Abdullah, Ashari Abraham Tuanakotta Aisyah Aisyah Alila Alila Andi Kamal Ahmad Arifah Kurnia Nazwah Syafei Ashari Abdullah Betheny Amahoru Burhanuddin Hasri Buri Hartanto Susilo Christina Siwalette David Daniel Marthin Huwae Edison Hukom Elisabeth Talakua Enjelita Paais Fataruba, Muhammad Zulham Godfried Lewakabessy Gunawan Abdullah Hadi Purwanto Hadi Purwanto Haikuty, Mathias Theofilus Hasyim Haddade Hattu, Alfredo Yefta Hattu, Stela Velly Istia, Penina Istia, Penina T Jakob, Juvrianto Chrissunday Josephus R. Matitaputty Kakaly, Sulastri Kaliky, Isnain Sah Kamarullah, Ridho Adian Kumbangsila, Ruben La Mohamat Saleh Latumahina, Jefri Lawalata, Alexander Biondy Lenora Leuhery Lenora Leuhery Lewakabessy, Godfried Matitaputty, Josephus R. Meyske A. Pattikawa Muh. Rum Muh. Rum Muhamad Ulwan Talaohu Nur Jihadilla Purwanto, Hadi Riruma, Gilberth Gerent Yoni Rohana Rohana Rohana Ruslan Ruslan Ruslan Rustan Rustan Rustan, Rustan Sjafrudin Latar Sopaheluwakan, Daniyela C Stiven Eurico Titariuw SUMARNI Sumarni Tahya, Hendrie Talakua, Elisabeth Titariuw, Stiven Eurico Tuhelelu, Juraidah Lili Yanti Walalayo, Rosmawati Wattimury, Maria Margaretha