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Semuel Uneputty
Politeknik Negeri Ambon
Civil Engineering, Building, Construction & Architecture Transportation

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PENGARUH VARIASI TEMPERATUR AIR TERHADAP NILAI KUAT TEKAN BETON David Daniel Huwae; Abraham Tuanakotta; Itang Tutupoho; Semuel Uneputty
Journal Agregate Vol. 2 No. 2 (2023): September
Publisher : Jurusan Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/ja.v2i2.1723

Abstract

Concrete is a composite material consisting of elements of coarse aggregate, fine aggregate, cement and water which act chemically (hydraulic), which then binds the grains of aggregate together to form a unified concrete (monolith). This study discusses the effect of variations in water temperature of 100C, 200C, and 300C in the concrete mixture on the compressive strength of structural concrete. It is necessary to monitor the temperature of the water in the concrete mixture to reduce excess heat due to the hydration reaction. The water temperature is set according to the design temperature, namely 100C, 200C and 300C to determine the effect on the compressive strength and workability values. Concrete compressive strength testing was carried out at the age of 3, 7 and 14 days. The number of specimens required is 27 cylindrical samples with a diameter of 15 cm and a height of 30 cm. The results of the slump test at water temperatures of 100C, 200C and 300C the lower the water temperature, the lower the slump value. And for testing At the age of 3.7 and 14 days concrete with a temperature of 100C produces Compressive Strength of 10.76 MPa, 12.17 MPa and 13.87 MPa, respectively, a temperature of 200C produces 12.55 MPa, 14.06 MPa and 16.42 Mpa, while the temperature of 300C produces 14.32 Mpa, 16.04 Mpa and 18.12 Mpa. The results of the compressive strength of concrete aged 28 days were converted from the results of the compressive strength test of concrete aged 7 days from the conversion results obtained that the temperature of 100C produced 17.38 Mpa, 200C produced 20.08 Mpa, 300C produced 22.91 Mpa. It can be concluded that normal temperature is more efficient in terms of compressive strength.
TINJAUAN PENERAPAN KESELAMATAN DAN KESEHATAN KERJA (K3) PADA PEKERJAAN PROYEK PEMBANGUNAN JALAN TRANS SERAM BAGIAN BARAT (STA 0+000-9+300) Semuel Uneputty; Glen Boyke Rehatta
Journal Agregate Vol. 1 No. 1 (2022): September
Publisher : Jurusan Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/ja.v1i1.1754

Abstract

West Seram Regency is one of the regencies in Maluku province, Indonesia. This district has a population of 212,393 in 2020 and its people are of very diverse backgrounds, both ethnic and religious. Meanwhile, the government center is in Piru, part of West Seram District, which has a population of 16,628 people. Huamual Rear District, which is the location of the Trans Seram road construction project, is a sub-district in West Seram Regency, Maluku, Indonesia. The Trans Seram road construction project, which is located from Limboro Hamlet - Ulatu Hamlet, Huamual Rear District, includes 5 hamlets including Limboro Hamlet, Temi Hamlet, Erang Hamlet, Tapinalu Hamlet, and Ulatu Hamlet. with a project length of up to 9.3 KM. The data analysis technique uses the descriptive method with the help of the SPSS program. Descriptive method is to provide an overview of research subjects based on variable data from the group of subjects studied.The results of this study can be concluded that in general the implementation of occupational safety and health in the Western Part of the Trans Seram Road Development Project is not good. Then the application of K3 in the drainage work was not good, the 2nd layer spreading and compaction work was not good, the paving work was not good, and the material transport work was not good. This was evidenced by the results of the descriptive statistical test (t-test) which rejected the initial hypothesis (H0). Occupational Safety and Health (K3) on the Western Part of the Trans Seram Road Construction Project Seen from the Attitude of Workers. From the descriptive analysis it can be concluded that the workers in the Western Part of the Trans Seram Road Construction Project have a positive attitude towards the Application of K3 in the Western Trans Seram Road Construction Project, positive attitudes are also triggered because the workers have good knowledge so that automatically their attitude also Good.
REHABILITASI SALURAN DRAINASE DESA LIANG KECAMATAN SALAHUTU KABUPATEN MALUKU TENGAH Glen Boyke Rehatta; Semuel Uneputty
Journal Agregate Vol. 1 No. 1 (2022): September
Publisher : Jurusan Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/ja.v1i1.1755

Abstract

The performance of drainage channels is very important to ensure the flow of water from upstream to downstream. Likewise with drainage channels in the village of Liang, Salahhutu sub-district, Central Maluku Regency. From the results of a previous study by the author regarding the capacity of the existing canals in Liang Village, there are several canals whose capacity will not be able to hold water in the next 10 years. The channels are channels K3 – K8 where the channel Planned Debit (Qr) > Existing Debit (QS). Therefore this study aims to rehabilitate the dimensions of the existing canal so that in the next 10 years the drainage canal in Liang village will be able to function properly. This research rehabilitates the dimensions of the existing canal so that its capacity can be increased. The results of the research are as follows; Channel K3 : Qr (2.598 m3/s) < Qs(4.8751m3/s). Channel K4 : Qr (2.0922 m3/sec) < Qs (2.2890 m3/sec), Channel K5 : Qr (2.21 m3/sec) < Qs (2.6526 m3/sec), Channel K6 : Qr (1.5119 m3/sec) < Qs (1.9813 m3/sec), Channel K7 : Qr (1.99 m3/sec) < Qs (2.0990 m3/sec), Channel K8 : Qr (2.25 m3/s) < Qs (3.2493 m3/s).
ANALISIS KINERJA SALURAN DRAINASE DESA LIANG KECAMATAN SALAHUTU KABUPATEN MALUKU TENGAH Glen Boyke Rehatta; Semuel Uneputty; Selly Metekohy
Journal Agregate Vol. 1 No. 1 (2022): September
Publisher : Jurusan Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/ja.v1i1.1756

Abstract

Liang Village is an area located in Salahutu District, Central Maluku Regency, Maluku Province. The increase in the population of the village of Liang led to rapid development, as well as causing an increase in the number of settlements. The conversion of land functions into settlements results in reduced water infiltration into the ground so that surface water runoff increases. In addition, an increase in population, housing also causes an increase in waste discharge, and has the potential to reduce water absorption and channel capacity. So it is feared that in the next few years the existing canal capacity will not be able to drain water. This study aims to analyze the existing canal capacity for the next 10 years. From the research results K1 & K2 channels meet the requirements because the channel's Planned Debit (Qr) < Existing Debit (QS). Channel K1 : Qr (0.61404 m3/sec) < Qs(2,14 m3/sec). Channel K2 Qr (1.176 m3/s) < Qs(1.48 m3/s). Channels K3 – K8 do not meet the requirements because the channel's Planned Debit (Qr) > Existing Debit (QS). Channel K3 : Qr (2.085 m3/s) .> Qs(1.63 m3/s). Channel K4 : Qr (1.6782 m3/s) .> Qs(1.63 m3/s). Channel K5 : Qr (1.7661 m3/s) .> Qs(0.60 m3/s). Channel K6 : Qr (1.2197 m3/s) .> Qs(0.61 m3/s). Channel K7 : Qr (1.5991 m3/s) .> Qs(0.82 m3/s). Channel K8 : Qr (1.8081 m3/s) .> Qs(1.20 m3/s).
Co-Authors Abraham Tuanakotta David Daniel Huwae Glen Boyke Rehatta Itang Tutupoho Selly Metekohy