Garuda - Garba Rujukan Digital

PEMANFAATAN LIMBAH PENGOLAHAN BAUKSIT UNTUK PEMBUATAN AGREGAT BUATAN Hariyani, Susi; Asmadi, Asmadi
RETENSI Vol. 1 No. 1 (2020): Retensi
Publisher : Jurusan Teknik Sipil Polnep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/retensi.v1i1.240

This filling material for concrete is known as aggregate which usually uses stone as the base material. This stone material will eventually run out, so new innovations are needed to replace it. The purpose of this study was to determine the physical and mechanical properties of concrete made using artificial aggregate mixture where the aggregate material is made by utilizing bauxite processing waste. Artificial aggregates are made to replace gravel as a filler. The waste is treated with 2 treatments, namely added with kaolin and without kaolin, and then burned. Concrete specimens are made in a cylindrical shape with a height of 30 cm with a diameter of 15 cm, with variations in artificial aggregate with the addition of kaolin and without the addition of kaolin with the aggregate substitution of 10%, 20% and 30% then evaluated physical properties such as weight content and absorption of concrete and the concrete mechanic is in the form of the compressive strength of the concrete. According to SNI 03 6468 2000, the quality of concrete produced from concrete mixtures using artificial aggregate from bauxite waste is classified as low compressive strength concrete (low strength concrete). with fc '<20 MPa and according to SNI 03-2847-2002, concrete produced by mixing artificial aggregate is categorized as lightweight concrete, with a unit weight of <1.900 kg / m³

KARAKTERISASI SIFAT FISIK DAN MEKANIK TANAH TIMBUNAN BABALESI YANG BERDASAR DARI LIMBAH BAUKSIT DAN BAKTERI PROBIOTIK: KARAKTERISASI SIFAT FISIK DAN MEKANIK TANAH TIMBUNAN BABALESI YANG BERDASAR DARI LIMBAH BAUKSIT DAN BAKTERI PROBIOTIK marini, lelly; Hariyani, susi; Purnama, Ikhwan Arief
RETENSI Vol. 2 No. 1 (2021): Retensi
Publisher : Jurusan Teknik Sipil Polnep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/retensi.v2i1.405

Bauxite waste in the form of red mud is known as waste could pollute water and soil in theenvironment around the mining area and endanger public health if not given advance prevention. Bythe increasing amount of waste and the growing amount of bauxite production, this problem becomeimportant issue for the mining sector, the government and the surrounding public directly affected.Utilization on a large scale and environmentally friendly are the points in this bauxite waste solution.The Babalesi landfill for road construction is a consideration in utilizing bauxite waste by usingprobiotic bacteria as a modifier. The feasibility and potential testing of Babalesi soil is carried out byphysical and mechanical tests of the soil based on ASTM Standards. These tests produce parametersthat refer to the AASHTO and USCS Classifications to determine the requirements for embankment2soil. For the physical test in the initial test of the red mud condition, the parameters indicated the A-7-6 classification, namely clay with poor quality. Furthermore, the physical test on Babalesi soilshowed A-4 classification, namely silt soil with medium quality. Meanwhile, the mechanical test forboth conditions, namely the original red mud condition and the Babalesi soil condition, could not becarried out because even in dry conditions, Babalesi soil proved to be very hard, but if it was inwatery conditions as a procedure in the mechanical test, it could not be formed and the mechanicalparameters could not be measured. The results of the physical test concluded that Babalesi landfillmeet the requirements and could be recommended as a road construction embankment. Themanufacture of Babalesi soil could be carried out directly in the waste pond by layered way usingheavy equipment as a stirrer of bacterial solution and bauxite waste.

PERBAIKAN SIFAT KIMIA RED MUD(RM) DENGAN MENGGUNAKAN BAKTERI PROBIOTIK: PERBAIKAN SIFAT KIMIA RED MUD(RM) DENGAN MENGGUNAKAN BAKTERI PROBIOTIK marini, lelly; Hariyani, susi; Anggraini, irene
RETENSI Vol. 2 No. 1 (2021): Retensi
Publisher : Jurusan Teknik Sipil Polnep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/retensi.v2i1.428

ed mud (RM) is waste from a series of bauxite mining processes, with the amount of RM producedaround 1.2 – 1.4 tons for every 1 tonne of alumina produced. RM has chemical properties that are quitedangerous because in addition to containing a lot of non-degradable metals, it also contains a strong base witha pH of around 13-14. If released in its original condition, RM is very dangerous because it could cause waterand soil pollution in the mining environment and could cause disease in humans. All the time, the handling ofRM is by making tailing dam or piling up the subsoil of the highway in the area around the mine which costs alot of money to restore the pH close to neutral before use because the requirement to be released into theenvironment around the allowable pH value is a minimum of 9. Therefore, in this study, the author uses asolution, namely by utilizing the biological activity of probiotic bacteria microorganisms, it could live in analkaline environment and are safe for humans and environmentally friendly. By mixing RM with activatedprobiotic bacteria which will be carried out direct observation of the sample and measuring the pH value. Witha total sample of 27 samples based on variations in the number of active probiotic bacteria mixed and theincubation time of bacteria, the results showed that the more active probiotic bacteria were mixed into the RMand the longer the incubation time of the bacteria, the pH indicator showed close to neutral, namely 8-9. It isalso supported by direct observations based on shape, color, smell and touch, showing that the harmfulchemical properties of RM are decreasing.

PENGARUH LIMBAH BAUKSIT SEBAGAI PENGGANTI PASIR TERHADAP KUAT TEKAN DAN DAYA SERAP BATAKO: PENGARUH LIMBAH BAUKSIT SEBAGAI PENGGANTI PASIR TERHADAP KUAT TEKAN DAN DAYA SERAP BATAKO Alif, Meta; Hariyani, susi; Arif, robby Mauludy
RETENSI Vol. 2 No. 2 (2022): Retensi
Publisher : Jurusan Teknik Sipil Polnep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/retensi.v2i2.472

Bauxite waste is a result of the alumina extraction mining process; this waste has the potential to pollute the environment if it is not managed properly. One of the efforts to manage that is to utilize the bauxite waste as a substitute material for making bricks. This study uses an experimental method by replacing a mixture of bricks, it is the sand substitute with bauxite waste with the percentage of bauxite waste at 0%, 25%, 50%, 70%, and 100% of the sand requirement. In this study the sample will be made like solid brick with size 0.39 m x 0.09 m x 0.10 m. Tests in this study include compressive strength test, water absorption capacity, and economic value. The results showed that is variation 1 pc : 100% sand : 0% bauxite waste had the highest average compressive strength value was 38.5 kg/cm2, and is variation of 1 pc : 0% sand : 100% bauxite waste is the lowest average compression strength was 12.2 kg/cm2 with 28 days of age. The highest water absorption capacity is variation 1 pc : 0% sand : 100% bauxite waste with an average value was 23.73%, and variation 1 pc : 100% sand : 0% bauxite waste has the lowest water absorption capacity with an average value was 7.54%.

PERENCANAAN STRUKTUR BETON BERTULANG PADA GEDUNG PASAR RAKYAT DI JALAN NIPAH KUNING DALAM: PERENCANAAN STRUKTUR BETON BERTULANG PADA GEDUNG PASAR RAKYAT DI JALAN NIPAH KUNING DALAM Tobing, M.F.L; Abduh, M.; Hariyani, susi
RETENSI Vol. 3 No. 2 (2023): Retensi
Publisher : Jurusan Teknik Sipil Polnep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/retensi.v3i2.654

The third largest economic sector contribution is large and unit commerce, one example of which is the traditional market. Traditional markets that are visited by residents of Pontianak City are the traditional TPI Nipah Kuning market and the trifting jeruju market, but the two markets have their own problems. In an effort to improve the facilities and infrastructure that support buying and selling to be better, the author is planning a people's market building so that these problems can be resolved. The location of this traditional market building is on Nipah Kuning Dalam Street, Pontianak City. The planning of this traditional market building is based on the Medium Moment Bearing Frame System (SRPMM). This building is designed to be strenght against several loading combinations. The planning method of this building is assisted by the AutoCad program and the engineering analysis is assisted by the SAP 2000 3D program, as well as the calculation of building structures based on SNI 2847-2013, SNI 1727-2013, SNI 1726-2019, and using the Guidelines for Loading Planning for Houses and Buildings (PPPURG) 1987. The results of structural design in the form of thick slabs from 1st-4th floor and the flat roof have a slabs thickness of 120mm with Ø10-230 main reinforcement on floor slab, and Ø10-240 main reinforcement on flat roof, and Ø10-320 beugle reinforcement on floor slab and flat roof, the sloof beam dimensions of 80x65cm, secondary sloof beams dimensions of 60x30cm, primary beam dimensions of 80x40cm, secondary beam dimensions of 60x30cm, upper tie-beam dimensions of 80x40cm, secondary upper tie-beam dimensions of 60x30cm using D19 main reinforcement and Ø8 beugle reinforcement, dimensions of structural columns and pedestal columns 65x65cm with 24D19 main reinforcement, and Ø10 beugle reinforcement, foundation using piles 45x45 cm depth of 20 m with pile cap dimensions of 565x565cm and thick 92cm. Keywords: traditional market, solid concrete structures, earthquake-resistant buildings, spectrum response, structural calculations

Perancangan Struktur Bangunan Gedung Asrama Mahasiswi Kabupaten Landak Prayoga, Alno; Novreza Pasha, Muhammad; Hariyani, susi; Fitriani, Nurul
RETENSI Vol. 4 No. 1 (2023): Retensi
Publisher : Jurusan Teknik Sipil Polnep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/retensi.v4i1.799

Observe from several urban districts in West Kalimantan they have a student dormitory as a form of local governmentsupport for the education of regional sons and daughters in Pontianak. The Landak Regency is no exception, which alsosupports the development of human resources through the construction of student dormitories in the Landak Regency.Landak Regency student dormitory will be built with 4 floors with a reinforced concrete structure. In the calculation ofthis building using the SAP 2000 application with SNI 2847-2013 for the calculation of reinforced concrete, and SNI1726-2019 for the calculation of earthquake resistance. From the calculation process, the thickness of the roof is not 12cm, floor plates 1-4 are found to be 13 cm thick. The dimensions of the beam (B1) are 25x40 cm, using field basereinforcement and 3D13 support reinforcement. For begel reinforcement, D8 reinforcement is used. The dimensions ofthe beam (B2) are 20x40 cm, using basic reinforcement for field reinforcement and support reinforcement, which is3D13. Column dimensions are 45x45 cm, using 12D16 main reinforcement. The foundation used is a pile foundationwith a depth of 20 meters with a pile dimension of 25x25 cm, and a pilecap dimension of 180 cm x 180 cm.

Title

Found 6 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 6 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 6 Documents
Search