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COMPRESSIVE AND SHEAR BOND STRENGTH OF OIL WELL CEMENT WITH CALCIUM CARBONATE AND SILICA FUME Arnoldus Meidio Adi Prasetyo; Ade Lisantono
Jurnal Teknik Sipil Vol. 13 No. 4 (2016)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

One of the critical factors of cementing process in oil drilling of off-shore-project is designing the cement slurry. For this reason, the slurry properties which have been classified by American Petroleum Institute (API) should be changed so it will match with the requirement of reservoir condition. Changing the slurry properties can be done by adding the additive material into the cement slurry such as Calcium Carbonate and Silica Fume. The research objective is to study the effect of calcium carbonate and silica fume to the compressive and shear bond strength of oil well cement. Fourty five cylinder specimens with the size of (75 x 150) mm were made for compressive strength testing and fourty five cylinder specimens with the size of (25.4 x 50.8) mm were made for shear bond strength testing. Five variants of the specimen were made in this study. The variant were cement slurry with (0% Calcium Carbonate + 0 % Silica Fume) as a reference specimen; (5% Calcium Carbonate + 5 % Silica Fume); (10% Calcium Carbonate + 10 % Silica Fume); (15% Calcium Carbonate + 15 % Silica Fume); (20% Calcium Carbonate + 20 % Silica Fume). The oil well cement specimens were tested in 7, 14, and 28 days. The experimental results show that the compressive strength of oil well cement will decrease when it is added with calcium carbonate and silica fume. The shear bond strength of the oil well cement increases for the specimen with 5 % Calcium Carbonate + 5 % Silica Fume. However, the shear bond strength will decrease when content of the Calcium Carbonate + Silica Fume more than 5 %. Based on the result of this research, the optimum amount of calcium carbonate and silica fume that can be use is 5%, because with 5% of calcium carbonate and 5% of silica fume, the reducing of compressive strength is the smallest and the shear bond strength is increased compare to the others specimen with 10%, 15%, and 20% calcium carbonate and silica fume.

SAMBUNGAN BALOK BETON BERTULANG PRACETAK DENGAN LAPISAN CFRP DAN PLAT BAJA Gilberto De Carvalho Da Conceição; Ade Lisantono
Jurnal Teknik Sipil Vol. 15 No. 2 (2019)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Precast reinforced concrete beams are building structures without using on-site casting and can shorten construction time and reduce costs and labor. In this research a method was used to overcome the shortcomings of the precast method in terms of weight and size, by dividing the precast segment into a new connection between the beam to the beam where the connection was reinforced with Carbon Fiber Reinforced Concrete (CFRP) and Steel Plate. Where there are 2 beam joints namely Type II connection on the connection area, steel plate and bolt data are used as Type III washers and joints, CFRP is added to the joint area and 6 mm thick steel plate and 20 mm diameter bolt. The dimensions of the beams used are 150 x 250 x 3200 mm with 4P10 longitudinal reinforcement as pressure reinforcement and 2P10 as pressure reinforcement. While 2P8-200 as shear reinforcement in the field area, 2P8-150 for connection area and 2P8-100 for support area. Where the quality of reinforcing steel in this method is BjTP 24, with a yield stress of 323.533 MPa for P10 and 237,249 MPa for P8. According to the results of the study the beam joints with centralized loading, the type II joint beam obtained a load capacity of 2782,718 kg while the type III connection experienced a load increase of 3553,875 kg due to the addition of CFRP layers on the beam joints.

PERILAKU LENTUR BALOK LAMINASI KAYU GLUGU DAN SENGON DENGAN SAMBUNGAN EPOKSI DAN PAKU Henda Febrian Egatama; Haryanto Yoso Wigroho; Ade Lisantono
Jurnal Teknik Sipil Vol. 17 No. 1 (2022)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jts.v17i1.6335

Kayu laminasi atau kayu glulam struktural (glued laminated timber) telah menjadi inovasi yang cukup berkembang dalam meningkatkan mutu kayu untuk digunakan sebagai elemen struktural suatu bangunan. Berbagai penelitian telah dilakukan sebagai upaya optimasi metode, antara lain dengan memvariasikan jenis kayu, dimensi, dan jumlah lamina. Penelitian untuk memeriksa pengaruh sambungan mekanis sebagai sambungan tambahan pada kayu laminasi dibutuhkan untuk memperluas inovasi metode, tetapi jumlah penelitian tersebut masih minim. Oleh karena itu, penelitian ini bertujuan untuk mempelajari pengaruh jarak antar paku sebagai sambungan mekanis tambahan pada perilaku lentur balok laminasi, yang sudah direkatkan dengan lem epoksi. Dalam penelitian ini, balok laminasi kayu glugu-sengon-glugu berdimensi 5 x 7 cm diuji lentur satu titik dengan variasi jarak antar paku sebesar 5, 10, 15, dan 20 cm. Berdasarkan hasil penelitian, penambahan sambungan paku dapat meningkatkan kekuatan lentur maksimum (MOR) sebesar 29% (47,67 MPa), 46% (54,01 MPa), 17% (43,12 MPa), dan 4% (38,49 MPa) pada variasi jarak antar paku 20 cm, 15 cm, 10 cm, dan 5 cm, dibandingkan dengan balok tanpa sambungan paku atau BK (36,91 MPa). Peningkatan nilai modulus elastisitas (MOE) terjadi pada variasi jarak antar paku 20 cm, 15 cm, dan 10 cm sebesar 19% (7213,22 MPa), 29% (7808,98 MPa), dan 16% (7016,08 MPa), sedangkan pada variasi jarak antar paku 5 cm terjadi penurunan sebesar 5% (5758,97 MPa), jika dibandingkan dengan BK (6042,20 MPa). Dari hasil tersebut, jarak optimal antar paku sebagai sambungan mekanis pada kayu laminasi adalah 15 cm. Lapisan kayu dengan kuat kelas yang lebih tinggi yang diletakkan pada bagian luar dapat memberikan penambahan kekuatan lapisan kayu dengan kuat kelas lebih rendah yang diletakkan di tengah.

Penyuluhan Sambungan Kayu dan Perbaikan Tangga Kayu Ruang Pertemuan Warga Kelurahan Bener, Kemantren Tegalrejo, Yogyakarta Egatama, Henda Febrian; Ade Lisantono
Jurnal Atma Inovasia Vol. 2 No. 6 (2022)
Publisher : Lembaga Penelitian dan Pengabdian pada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jai.v2i6.6519

Bener Village is located in Tegalrejo District, Yogyakarta City, Special Region of Yogyakarta. The condition of infrastructure in Bener Village, especially in RT 10 RW 3, it was found that there were several buildings of wooden construction. One of the buildings with wooden construction is a resident's house which is also used for village resident’s meetings. Documentation from residents shows the condition of the building with damage to the stairs and wooden floor decks. Damage occurs due to poor wood quality and due to service life, as well as direct weather exposure. This Community Service aims to carry out repairs (renovations) on damaged infrastructure and increase public awareness about the importance of ensuring the quality of wood construction for the community, especially construction workers regarding wood connections. This service consists of three (3) stages, namely problem assessment, preparation of service, and implementation of service. This service has become a trigger in increasing public awareness about the importance of the correct application of wood construction as a building material. It has been attempted by holding counseling on construction and wood connection. In addition, the need to renovate the wooden stairs of the community meeting building has been fulfilled through this service by carrying out renovations in mutual cooperation between the service team and residents, using wood materials with a higher quality class and in accordance with the conditions at hand, namely direct weather exposure.

Penyuluhan Sambungan Kayu dan Perbaikan Tangga Kayu Ruang Pertemuan Warga Kelurahan Bener, Kemantren Tegalrejo, Yogyakarta Egatama, Henda Febrian; Ade Lisantono
Jurnal Atma Inovasia Vol. 2 No. 6 (2022)
Publisher : Lembaga Penelitian dan Pengabdian pada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jai.v2i6.6519

Bener Village is located in Tegalrejo District, Yogyakarta City, Special Region of Yogyakarta. The condition of infrastructure in Bener Village, especially in RT 10 RW 3, it was found that there were several buildings of wooden construction. One of the buildings with wooden construction is a resident's house which is also used for village resident’s meetings. Documentation from residents shows the condition of the building with damage to the stairs and wooden floor decks. Damage occurs due to poor wood quality and due to service life, as well as direct weather exposure. This Community Service aims to carry out repairs (renovations) on damaged infrastructure and increase public awareness about the importance of ensuring the quality of wood construction for the community, especially construction workers regarding wood connections. This service consists of three (3) stages, namely problem assessment, preparation of service, and implementation of service. This service has become a trigger in increasing public awareness about the importance of the correct application of wood construction as a building material. It has been attempted by holding counseling on construction and wood connection. In addition, the need to renovate the wooden stairs of the community meeting building has been fulfilled through this service by carrying out renovations in mutual cooperation between the service team and residents, using wood materials with a higher quality class and in accordance with the conditions at hand, namely direct weather exposure.

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