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PERENCANAAN SUMUR RESAPAN AIR HUJAN UNTUK KONSERVASI AIR TANAH DI DAERAH PERMUKIMAN (STUDI KASUS DI PERUMAHAN RT. II, III, DAN IV PERUMNAS LINGKAR TIMUR BENGKULU) Kurnia Iriani; Agustin Gunawan; Besperi Besperi
Inersia: Jurnal Teknik Sipil Vol 5, No 1 (2013)
Publisher : Universitas Bengkulu

The increasing of development for supporting facilities in public life triggers transformation of land use and decreasing of open space for infiltration area. This causes surface flow (run-off) and some rainwater infiltrating into land. Therefore, it is necessary made a patch like the infiltration well which is used to patch and then infiltrate rainwater into soil slowly. The purpose of this research was to determine amount and construction of infiltration well. This research was executed in housing RT. II, III, and IV Lingkar Timur at Bengkulu City that hasnumber of house 153. This study used survey methods such as measuring,questionnaire/interviewing, and percolation test to obtain the required data. Based on the data and analysis of calculation according to SK SNI 03-2453-2002, was determined that for individual infiltration well, the form of infiltration well was circle with a diameter of 1 m and a depth of 3 m, while for communal infiltration well was circle with a diameter of 1.4 m and a depth of 3 m (by 92 pieces). The others alternative form for individual infiltration well was square with a width of 1.2 m and a depth of 1.5 m, while for communal infiltration well was square with a width of 1.4 m and a depth of 3 m (by 72 pieces). Construction of infiltration well according to Technical Instruction Applying Drainage Method with Environmental Concept In Residence Area (2002) was brick wall or red brick pair without plastered and among it given hole.

PENGARUH PENCAMPURAN DUA JENIS AGREGAT KASAR TERHADAP KUAT TEKAN BETON Agustin Gunawan
Inersia: Jurnal Teknik Sipil Vol 8, No 1 (2016)
Publisher : Universitas Bengkulu

This research aims to find out influence of two combined coarse aggregate toward concrete compressive strength. Two kinds of aggregate which have different quality gradation are coarse aggregate from Quarry Sukaraja (KS) and Pondok Kubang (KP). Conceret mix design used a composition of 1 cement : 2 sand : 3 coral with two coral variations(50% KS + 50% KP and 35% KS + 65% KP), and two kinds of sand (river sand and sea sand). The sample was cylindrical form with diameter of 15 cm, and height of 30 cm as many as 32 samples. Compressive strength test was done at 28 days. Test results of concrete compressive strength showed that 50% KS + 50% KP can improve value of concrete compressive strength to normalconcrete (KS) (16,76% (for river sand) and 17,98% (for sea sand)). Concrete compressive strength of mixture of 50% KS + 50% KP increased 31.9% (for river sand) and 30% (for sea sand) to the normal concrete (KP). By a mixture of 35% KS + 65% KP, concrete compressivestrength increased 6,22% (for river sand) and 15,97% (for sea sand) to normal concrete (KS), and a mixture of 35% KS + 65% K increased concrete compressive strength 20% (for sand river) and 27,78% (for sea sand) to normal concrete (KP).

PERILAKU KEKAKUAN LENTUR PELAT KOMPOSIT LANTAI GABUNGAN BETON PRECAST DAN CAST IN SITU DENGAN PENGKASARAN INTERFACE PADA BEBAN STATIK BERULANG Agustin Gunawan
Inersia: Jurnal Teknik Sipil Vol 2, No 2 (2011)
Publisher : Universitas Bengkulu

The experiment was focused at the midspan part of the slab and conducted to investigate the influence of surface roughing at semi precast slab of the characteristic of elastic of slab made monolithically. In the research, it was conducted testing of two groups of slab which has 1:1 scales. Each group consists of three. The first group was the monolith slab as control speciment. The second group was the composite slab with surface roughing. Each group was loaded by the repeated center static loading until 10 % of the ultimate load, then the load was taken off. The treatment was carried out 10 time (cycle). The testing result showed that the flexural stiffness of monolith slab and composite width of 400 mm and 600 mm as long as loading 10 was consistent, and the flexural stiffness of slab width of 600 mm was higher than that of slab width of 400 mm. The flexural stiffness increased was not proportion to increased of slab width measurement. At the repeated loading cycle ( 10 cycle), the flexural stiffness of composite slab before P firstcrack reached about 45,21 % (width of 200 mm), 31,70 % (width of 400 mm), and 20,52 % (width of 600 mm) less than that of monolith slab.P first crack

PENGARUH PENGGUNAAN ZEOLIT SEBAGAI BAHAN PENGGANTI SEBAGIAN SEMEN TERHADAP KUAT TEKAN PAVING BLOCK KONVENSIONAL Agung Rizki Pratomo; Fepy Supriani; Agustin Gunawan
Inersia: Jurnal Teknik Sipil Vol 10, No 2 (2018)
Publisher : Universitas Bengkulu

This research was motivated by the contained SiO2 in zeolite. The purpose of this research was to know the zeolite effect as a substitute of cement in constructing 14 days paving block material which used conventional method toward the compressive strength of paving block. This research used SNI 03-06-1996 in constructing and testing the materials. The material was cube shaped with ±5 cm size which consists of normal paving block and 6 variations with 5 specimens of each variation. Total of specimen were 35. Substitute of zeolite variations used 2,5%, 5%, 7,5%, 10%, 12,5%, and 15% on the weight of cement. The result of compressive strength of normal paving block is 15,64 MPa. The result of compressive strength test had increased in the variation of 2,5% zeolite substitute by 6,28% normal paving block. The result of compressive strength test results showed the greatest decrease in variation of 15% zeolite replacement by 39,05% against normal paving block.

ANALISIS PRODUKTIVITAS TENAGA KERJA PADA PEKERJAAN PASANGAN BATA PERUMAHAN TIPE 36 (Studi Kasus pada Perumahan Griya Putri Tanjung Kota Bengkulu) Chindy Yulianty; Fepy Supriani; Agustin Gunawan
Inersia: Jurnal Teknik Sipil Vol 13, No 1 (2021)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/ijts.13.1.8-16

The process of housing development is inseparable from labor productivity. This study aimed to determine the value of LUR (Labor Utilization Rate), workgroup productivity, and dominant factors that influence the masonry work in Griya Putri Tanjung Housing. The method used in the research was field observations for six houses by observing the effective work time, contribution work time, and ineffective work time, calculating the area of bricklaying and questionnaires to 12 workers. The questionnaires were processed with SPSS 24. The results obtained showed that the highest worker utility factor (LUR) was on day 2 of 88.89%. The Average LUR in Putri Tanjung Griya Housing is greater than 50%, so the work utility factor reaches the effective time. The highest average productivity of each workforce is on the 3rd day by a productivity value of 1.51 m2/hour/person. The most dominant factor was the time factor and implementation conditions (up to 82%), then the physical factor of labor (32,8%), managerial (-24,1%), the background of the employee (19,1%). The lowest factor was the group factor and the expertise of the workforce by a percentage of influence of -17,5%. Keywords: housing, labor, bricklaying.

PENGARUH PENAMBAHAN ARANG BATOK KELAPA TERHADAP KUAT TEKAN MORTAR Adi Putra Sihombing; Yuzuar Afrizal; Agustin Gunawan
Inersia: Jurnal Teknik Sipil Vol 10, No 1 (2018)
Publisher : Universitas Bengkulu

Mortar is a mixture of adhesives (portland and lime cement), sand and water with certain compositions. Use of adhesive materials on building construction in general still use portland cement, but in terms of portland cement costs are required a greater cost. This study aims to determine the behavior of the compressive strength of mortar using Coconut Shell Charcoal (CCS) as a substitute for cement. The method of manufacture and testing of mortar compressive strength refers to SNI 03-6825-2002 with mortar 1Pc: 3Ps mortar. Range of initial flow values used is 105% - 115%. CCS used is pass No. 200 which utilizes combustion results from coconut shells. Variations of mortar test specimens were 0%, 2.5%, 5%, 7.5%, 10% and 12.5% respectively each variation had 10 sample specimens. Test sample was immersed for 27 days and compressive strength mortar test was performed at 28 days. Value compressive strength of mortar on variations of 0%, 2.5%, 5%, 7.5%, 10%, 12.5% are 25.11 MPa, 25.65 MPa, 26.07 MPa,27.00 MPa, 26.40 MPa and 25.98 MPa. The highest increase of mortar compressive value was variation of 7.5% by 7.51%.

SUMUR RESAPAN AIR LIMBAH KAMAR MANDI UNTUK KESEIMBANGAN PERMUKAAN AIR TANAH DI DAERAH PERMUKIMAN (Studi Kasus Di Perumahan RT. II, RT. III, dan RT. IV Perumnas Lingkar Timur Bengkulu) Anggun Lia Anestri; Agustin Gunawan; Besperi Besperi
Inersia: Jurnal Teknik Sipil Vol 5, No 1 (2013)
Publisher : Universitas Bengkulu

omestic waste water from bathroom, that generally being a waste water, can be used to balance the ground water surface.Utilization of bathroom waste water is done by making the infiltration well. This study aimed to quantify the debit of resulted bathroom waste water and to design the bathroom waste water infiltration well. The experiment was conducted in Housing RT. II, RT. III, and RT. IV Permunas Lingkar Timur of Bengkulu that has number of house of153 units and number of inhabitant as much as 701 people. The research used survey methods such as questionnaires / interviews and percolation test to obtain the required data. Based on the data and analysis of calculation according to the Sunjoto method, concluded that the debit of bathroom waste water for RT. II, RT. III, and RT. IV was consecutive 3.38x10-5 m3/s, 9.688x10-5 m3/s, 0.0001558 m3/s. The number of produced infiltration well total 33 wells whichis 4 wells for RT. II, 5 wells for RT. III, and 24 wells for RT. IV. Each of infiltration well haddifferent dimensions in accordance with the need.

PENGARUH PENAMBAHAN SERAT PANDAN PUNDAK DURI (PANDANUS TECTORIUS) TERHADAP KUAT TARIK BELAH BETON Sherly Marlia; Agustin Gunawan; Fepy Supriani
Inersia: Jurnal Teknik Sipil Vol 8, No 2 (2016)
Publisher : Universitas Bengkulu

Concrete is a material that is high in compression, but weak in tensile. The weakness of concrete can be minimized by conducting several concrete development. Fiber-reinforced concrete is concrete given the addition fiber in the concrete mixture. Pandanus tectorius spines fairly high in fiber, so that should be developed in the technology of materials, particularly concrete engineering fields. This study aims to determine the value of tensile strength of concrete sides and variations of the fiber increment persentage in the concrete that would get the highest tensile strength. Tested specimen for tensile strength was cylindrical with 30 cm in height and 15 cm in diameter.There was 4 variations of pandanus tectorius fiber addition, consecutively 0.25%, 0.5%, 0.75% and 1%. The water cement ratio used was 0,5 with slump range between 60-100 mm. The addition of pandanus tectorius fiber gave a lower tensile strength than normal concrete. The lowest and highest strength was consecutively 9,687%(variation 0,25%) and 25,718% (variation 1%).

PENGARUH PENGGUNAAN ABU SABUT KELAPA SAWIT SEBAGAI BAHAN PENAMBAH SEMEN TERHADAP KUAT TEKAN PAVING BLOCK agustin gunawan; febriyan abimanyu; yuzuar afrizal
Inersia: Jurnal Teknik Sipil Vol 12, No 1 (2020)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/ijts.12.1.12-17

The research is motivated by the large amount of untreated oil palm industrial waste, with a silica contet. This research was aimed to find the compressive strengh of paving block that use oil palm fiber ash as the added material to cement. This research method was experimental. The paving block making prosess was done in the way which the factory did. The specimens made had a size of 20 cm x 10 cm x 6 cm with a ratio of 1 cement : 3 sand. The variations of the ash addition were consecutively 0%, 2,5%, 5%, 7,5%, 10%, 12,5% and 15% to the volume of cement. The total number of specimens was 35, with 5 pieces for each variation. Water requirement in each mixture referred to SNI 03-6882-2002. Paving block was formed manually, soaked for 12 days, then at the age of 13 days paving block was cut into cubes with 5 cm on each side and tested for compressive strength at the age of 14 days. The results of the average compressive strength of paving block in each variation were consecutively 15,13 MPa, 15,22 MPa, 15,78 MPa, 16,44 Mpa, 16,53 MPa, 13,77 MPa and 10,37 MPa. The highest value of compressive strength occurred on the addition of 10% which was equal to 16,53 MPa (increased by 9,25% from the normal paving block (variation of 0%) and the largest decrease occurred on the variation of 15% (-31,51% from the normal paving block). Keywords : paving block, compressive strength, oil palm fiber ash

HUBUNGAN BERAT ISI DAN KUAT TARIK BETON SERAT BAMBU DENGAN ABU CANGKANG LOKAN DAN ABU SEKAM PADI Elhusna Elhusna; Agustin Gunawan; Reizki Darmawan
Inersia: Jurnal Teknik Sipil Vol 5, No 2 (2013)
Publisher : Universitas Bengkulu

Concrete which has significant weight is good at compressive strength and poor at tensile strength. This study aimed to find out the relationship between the tensile strength and density of bamboo fiber concrete which 40 % of the fine aggregate was replaced with the sea shell ash (ACL) and the rice husk ash (ASP). The bamboo fiber variations which used, 0,25 % (V1) dan 0,50 % (V2) were calculated from the cement weight. Each fiber bamboo variations has 3samples of ACL and ASP weight ratio e.g 35:65 (C1), 50:50 (C2), 65:35 (C3). 3 concrete cylinders of diameter 15 cm and height 30 cm were made for each samples. All the specimens were compared to the normal concrete of water cement ratio 0,45 and slump value 6-10 cm.The specimens were made and maintained by SK SNI T-15-1990-03 and SNI 03-2493-1991. The tensile strength of the specimens were tested at the age of 28 days according to SNI 03-24912002. The highest tensile strength was belonged to V2C2. The significance density (2.347,57 kg/m3) belong to the normal concrete. The highest of the density and the tensile strength of eachvariation of ACL and ASP were occurred at the bamboo fiber concrete 0,5 % (V2).

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