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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.

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%).

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).

PENGARUH SERAT SABUT KELAPA TERHADAP KUAT LENTUR BETON DENGAN FAKTOR AIR SEMEN O,5 Elhusna Elhusna; Fepy Supriani; Agustin Gunawan; Mukhlis Islam
Inersia: Jurnal Teknik Sipil Vol 3, No 1 (2011)
Publisher : Universitas Bengkulu

18 slabs of 100x100x500 mm dimension had been tested to find out the influence of coconut fiber as the additive to the flexural strength of concrete. The water ratio of the concrete mix design was 0,5. The percentation of coconut fiber were 1%, 2%, 3%, 4% and 5% of the volume of the specimen. The result showed that the fiber additional to the concrete cause the strength getting higher as the percentation getting bigger. The flexural strength of 5% the fiber was 30% higher than the slab of the concrete without the fiber.

PENGARUH CAMPURAN DUA AGREGAT HALUS TERHADAP KUAT TEKAN BETON Agustin Gunawan
Inersia: Jurnal Teknik Sipil Vol 6, No 1 (2014)
Publisher : Universitas Bengkulu

Increasing Exploration of river sand push an action to find other aternative excepting river sand. Using of sea sand become alternative as fine aggregate mixed on making of concrete. The research is conducted to know the effect of fine aggregate mixed to concrete compressive strength. Two kinds of fine aggregate used are river sand (PS) from Pondok Kelapa and sea sand from Lais, which is all bad gradation. Coarse Aggregates used are from quarry Sukaraja and quarry Pondok Kubang. Sea sand consists of two conditions which is not washed (PLTC) and washed (PLC) without regard to content of its mud. Number of samples was 42 samples which were cylindrical in shape with diameter of 15 cm and height of 30 cm. The research carried out by combined 65% PS + 35% (PLC or PLTC) and 75% PS + 25% (PLC or PLTC) then compared it to concrete of comparison. Test of concrete compressive strength was performed at 28 days. The result showed that the greatest concrete compressive strength was 16,88 MPa occured on a mixture of 75% PS + 25% PLTC using coarse aggregate from Sukaraja. Mixture of 75% PS + 25% PLTC using coarse aggregate from Sukaraja increased concrete compressive strength of 5,47 MPa (+47,93%) to concrete of comparison using 100% PLTC and 4,05 MPa (+24,02%) to concrete of comparison using 100% PS.

PERILAKU TEKUK (BUCKLING) PADA BAMBU PETUNG BENTUK BILAH Agustin Gunawan
Inersia: Jurnal Teknik Sipil Vol 1, No 2 (2010)
Publisher : Universitas Bengkulu

The Compressed bar at the frame, columns, and other structures is always probably happened buckling. The experiment is conducted to investigate the behavior of buckling at the bar of lath shaped bamboo petung and the buckling strength of the experiment result with the theory result (the equation of tetmayer and euler, proposal of morisco, and atrops (D/T=0)). In the research, it is conducted testing of the mechanic character of bamboo and wood specimens, testing of resin, and buckling testing with the compressed testing principle. The testing result showed that buckling happened at the lath shaped bamboo petung is influenced by the length of bar, the resin strength, and the quality of work. The buckling stress of the experiment result was higher than the result of morisco proposal, but it’s less than the result of tetmayer and atrops (D/T=0), so that the equation of morisco proposal is safe to used at the compressed bar design.

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