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STUDI EKSPERIMEN PENGARUH CAMPURAN SIKA DALAM MENINGKATKAN KUAT TEKAN BATA RINGAN A, Arman.; Medriosa, Hamdeni; A, Agri Americo; Fantoni, Faizal Rahmat
Rang Teknik Journal Vol 3, No 1 (2020): Vol. 3 No. 1 Januari 2020
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Dalam pembuatan nya, bata ringan mempunyai campuran agregat khusus yaitu bahan seperti pasir, semen, zat additive sikament NN, dan air dalam pembuatan bata ringan. Agregat khusus bata ringan dapat diperoleh dari alam baik secara langsung maupun dari proses terlebih dahulu. Bata ringan biasa yang beredar dipasaran banyak yang tidak sesuai dengan Standar Nasional Indonesia (SNI 15-2094-1991 dan SNI 15-2094-2000). zat additive sikament NN merupakan cairan yang berfungsi sebagai zat additive untuk mengurangi kadar air dan untuk mempercepat pengerasan beton dan kelecekannya tinggi, sesuai dengan A.S.T.M C494-81 Type F. Dari hasil pemeriksaan kuat tekan bata ringan dengan penambahan zat additive sikament NN pada tiga variasi dimana tiap-tiap variasi tersebut memiliki umur rencana yaitu 3 hari, 14 hari, dan 28 hari untuk bata normal hasil uji kuat tekan pada umur 3 hari di dapatkan nilai kuat tekan 11,14 MPa, pada umur 14 hari di dapatkan nilai kuat tekan 12,45 MPa dan pada umur 28 hari di dapatkan nilai kuat tekan 12,79 MPa.Untuk bata dengan campuran 5% zat additive sikament NN pada sampel yang di uji pada umur 3 hari di dapatkan nilai kuat tekan 14,36 MPa, pada umur 14 hari campuran 5% di dapatkan nilai kuat tekan 16,06 Mpa, dan pada umur 28 hari di dapatkan nilai kuat tekan 19,30 MPa. Untuk bata campuran 15% zat additive sikament NN pada sampel uji tekan umur 3 hari di dapatkan nilai kuat tekan 24,13 MPa, pada umur 14 hari di dapatkan nilai kuat tekan 26,47 MPa dan pada umur 28 hari di dapatkan nilai kuat tekan 26,97 MPa. Untuk bata campuran 25% pada sampel yang di uji tekan umur 3 hari di dapatkan nilai kuat tekan 25,14 MPa, pada umur 14 hari di dapatkan nilai kuat tekan 28,33 MPa dan pada umur 28 hari di dapatkan nilai kuat tekan 29,94 MPa, sedangkan Zat additive sikament NN, Zat Foam Agent (Busa) terhadap pemakaian volume air diambil 5% di peroleh hasil kuat tekan bata ringan rata-rata pada umur 28 hari 15,28 MPa.

STUDI PENGARUH POSISI BUKAAN DINDING BATA PADA PORTAL Medriosa, Hamdeni; Ridwan, Muhammad; AGUS, AGUS; Nofera, Wenda; Gustiani, Yusnita
Journal of Infrastructural in Civil Engineering Vol 5, No 01 (2024): Volume 5, Issue 01, January 2024
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jice.v5i01.4014

Walls with brick filling are one of the building elements that separate and form rooms. The wall with brick filler is assumed only to be a load on the frame structure and does not consider the existence of this wall as structural. However, walls also have openings, which are essential for infill walls for functional reasons such as doors, windows, air circulation, and other building operations. These wall openings make predicting reinforced concrete structures' behavior and seismic capacity challenging. Numerical modeling and simulations have been conducted using software to evaluate the lateral strength of wall structures with openings as wide as 35% and several types of openings. The analysis results show that the strength of reinforced concrete structures with openings of 35% for type 1 is 93.21 kN, type 2 is 81.77 kN, and type 3 is 89.71 kN. It can be concluded that infill walls that have openings of 35% still contribute to resisting lateral loads because they do not exceed the specified standard deviation, namely 20%.

PENGARUH LAMA WAKTU PENGADUKAN BETON NORMAL DAN PENAMBAHAN FOSROC TERHADAP KUAT TEKAN BETON A, Arman.; Agus, Agus; Nofrizal, Nofrizal; Medriosa, Hamdeni; Rafli, Muhammad
Ensiklopedia of Journal Vol 6, No 2 (2024): Vol. 6 No. 2 Edisi 3 Januari 2024
Publisher : Lembaga Penelitian dan Penerbitan Hasil Penelitian Ensiklopedia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33559/eoj.v6i3.1395

This study aims to determine the effect of normal concrete mixing time and the addition of fosroc addictive substance on the compressive strength of concrete. The stirring time was varied for 3 different times, namely 3, 8, and 20 minutes, where from each time variation the compressive strength of the concrete was tested. This research was conducted by comparing the stirring time of 3, 8, and 20 minutes. The results of testing the compressive strength of concrete aged 28 days for concrete with normal concrete stirring time of 3 minutes 27.55 MPa, 8 minutes 30.38 MPa, 20 minutes 29.40 MPa, and concrete with additional Fosroc 3 minutes 30.19 MPa, 8 minutes 29.44 MPa, 20 minutes 20.57 MPa. And on the results of the slump test for concrete with a normal mixing time of 3 minutes 4.5 cm, 8 minutes 7.5 cm, 20 minutes 4 cm, and concrete with additional Fosroc 3 minutes 4 cm, 8 minutes 5 cm, 20 minutes 3, 5 cm. From these results, the standard planned for k250 concrete is 26 MPa, in this study the average compressive strength achieved the planned results, except for a time variation of 20 minutes with the addition of fosroc which was below the planned one, which was 20.57 MpaKeywords: Stirring time, compressive strength

THE EVALUATION OF IMPLEMENTATION OF THE USE OF PERSONAL PROTECTIVE EQUIPMENT AND CONSTRUCTION K3 SIGNS Isror, Maizul; Nugroho, Fajar; Medriosa, Hamdeni
Journal of Health Management, Administration and Public Health Policies Vol. 2 No. 1 (2024): Journal of Health Management, Administration and Public Health Policies
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, Universitas Muhammadiyah Muara Bungo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52060/hmaps.v2i1.1963

This research is motivated by the low urgency of occupational health and safety (K3) in construction projects in Indonesia, despite the government having regulated its implementation in the law. This study aims to determine the implementation of Personal Protective Equipment (PPE) in the Construction Project of the Information Center and Library of Padang State University conducted by the company. This research is qualitative in nature. Based on the research results, it is known that, referring to Minister of Public Works and Public Housing Regulation Number 10 of 2021 Regarding the Construction Safety Management System (SMKK), it is concluded that safety helmets, eye protectors, face shields, diving masks, gloves, safety shoes, full-body harnesses, electrical gloves, and respiratory protectors in accordance with Indonesian National Standards (SNI) are available. However, there are no ear protectors, and it is also known that the safety vests and respiratory protective masks do not comply with SNI. Furthermore, it is known that the documents provided by the company are the Construction Safety Plan (RKK), Construction Work Quality Plan (RMPK), Quality Program, Environmental Management and Monitoring Work Plan (RKPPL), and Work Traffic Management Plan (RMLLP). However, the conceptual design document for SMKK is not available. Based on the research results, the researchers suggest that the company should provide complete Personal Protective Equipment (PPE). The company should also install signs at every hazardous location, with signs that are easily visible, clear, and understandable. The company should have complete documents in accordance with the documents required by construction service providers as per Minister of Public Works and Public Housing Regulation Number 10 of 2021 Regarding the Construction Safety Management System (SMKK), and the workers should correctly and consistently use the provided Personal Protective Equipment (PPE) and follow the safety procedures established for each job.

ANALISIS STRUKTUR GEDUNG DPRD KOTA BUKITTINGGI MENGGUNAKAN SNI BETON BERTULANG 2847:2019 DAN SNI GEMPA 1726:2019 Medriosa, Hamdeni; Wirahadi Kusuma Wau, Antonius
Jurnal Teknologi dan Vokasi Vol 1 No 2 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.2.67-74

Structural design is an important element in the construction of a building in order to produce a building that is strong, safe and economical. The overall structure of the building consists of two parts, namely the upper structure in the form of floors, beams, columns, walls and roof while the lower structure is in the form of a foundation. The DPRD building for the city of Bukit Tinggi will be analyzed using the Special Moment Resisting Frame Structure (SRPMK) system based on the procedure for calculating reinforced concrete structures using (SNI 2847-2019). Earthquake load analysis uses the spectrum response method based on earthquake resistance planning procedures for building and non-building structures using (SNI 1726-2019). Analysis of minimum design loads and related criteria for buildings and other structures using (SNI 1726-2020). Modeling in this study uses software based on 3D finite elements using SAP2000. The results of this study explain that the modeling meets the requirements for SNI-1726-2019 earthquake design and SNI 03-2847-2019 reinforced concrete design.

Bahasa Inggris Medriosa, Hamdeni; Tanjung, Jafril; Maidiawati; Haris HG, Sabril
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 13 No 1 (2025): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2025)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v13i1.10166

The width of diagonal strut is not commonly known for having significant benefit to the lateral strength of brick walls. However, some researchers have resumed that strut width has a significant impact on lateral strength. Both experimental and analysis studies indicates that the width of the diagonal strut indeed has a significant impact on the lateral strength of brick walls. By employing the developed analytical model, it became evident that the width of the strut benefited the strength of the brick wall. The purpose of this research is to determine the effect of diagonal strut width on the lateral strength of brick walls. The methodology employed to ascertain the lateral strength of brick walls was by conducting a comparative analysis of the analytical and numerical outcomes from varied strut widths at the mid-span openings to the various form of openings. The analytical approach was conducted with the use of diagonal struts, while the numerical modeling was done with the Atena 2D software. The analytical results obtained were 65.15 kN for diagonal strut 1 and 73.75 kN for diagonal strut 2. The numerical results obtained were 64.7 kN for diagonal strut 1 and 75.7 kN for diagonal strut 2. The findings derived from this investigation substantiate the pivotal influence of strut width on the lateral strength of brick walls.

ANALISIS STRUKTUR GEDUNG DPRD KOTA BUKITTINGGI MENGGUNAKAN SNI BETON BERTULANG 2847:2019 DAN SNI GEMPA 1726:2019 Medriosa, Hamdeni; Wirahadi Kusuma Wau, Antonius
Jurnal Teknologi dan Vokasi Vol 1 No 2 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.2.67-74

Structural design is an important element in the construction of a building in order to produce a building that is strong, safe and economical. The overall structure of the building consists of two parts, namely the upper structure in the form of floors, beams, columns, walls and roof while the lower structure is in the form of a foundation. The DPRD building for the city of Bukit Tinggi will be analyzed using the Special Moment Resisting Frame Structure (SRPMK) system based on the procedure for calculating reinforced concrete structures using (SNI 2847-2019). Earthquake load analysis uses the spectrum response method based on earthquake resistance planning procedures for building and non-building structures using (SNI 1726-2019). Analysis of minimum design loads and related criteria for buildings and other structures using (SNI 1726-2020). Modeling in this study uses software based on 3D finite elements using SAP2000. The results of this study explain that the modeling meets the requirements for SNI-1726-2019 earthquake design and SNI 03-2847-2019 reinforced concrete design.

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