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All Journal Inersia : Jurnal Teknik Sipil Abdi Reksa

Agustin Gunawan

Universitas Bengkulu

Author-ID : 4277273

Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Social Sciences

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PERILAKU KUAT TEKAN MORTAR SEMEN PASANGAN DENGAN ABU SABUT CANGKANG SAWIT YANG DIOVEN DAN TIDAK DIOVEN Elhusna Elhusna; Agustin Gunawan; Dofi Hendro Fogi
Inersia: Jurnal Teknik Sipil Vol 5, No 1 (2013)
Publisher : Universitas Bengkulu

The order of mortar cement which used to bond individual units of masonry and to cover masonry wall keeps increasing. Meanwhile, the natural source of cement is limited. This article is the report of the research of the behaviour of mortar compression strength which used palm oil fibrous shell ash as the additive of cement. The ash used in this research was strained by strainer number 200. The ash discerned to the difference between the oven and unoven one. The proportions of cement and sand that used were 1:3 dan 1:5. The percentages of each of the ash were varied by the increment 2,5% between 0 to 10 %. 200 mortar 50 mm cubes distributed to each cell of samples were used according to ASTM C109/C109M-02. The concistency and the workability of the mortar was done by flow table test according to ASTM C-270. The mortar cubes were cured in water since the mall were gotten off. The compession test was held according to SNI 03-6825-2002 at 28 days of the cubes age. The results of analysis of variance (anova) of the mortar strength which used ovened ash were significant for the strength of the proportion 1:5 and unsignificant for the strength of 1:3 of the proportion. The strength of the significant one was inceased 0.66% at the mortar which used 10% ash. The results of the anova of the mortar strength with unovened ash were significant for the mortarproportion 1:3 and unsignificant for the strength of 1:5 mortar proportion. The strength of the significant one was 1,54% higher at mortar with 2,5% ash compared to the one without the ash.

PERILAKU LENTUR PELAT KOMPOSIT DENGAN PENGKASARAN INTERFACE PADA MOMEN KAPASITAS LAPANGAN Agustin Gunawan; Suprapto Siswosukarto; Bambang Supriyadi
Inersia: Jurnal Teknik Sipil Vol 4, No 1 (2012)
Publisher : Universitas Bengkulu

The research aimed at investigating of the influence of surface roughing at semi-precast slab to slab strength on the first crack and the ultimate, the slab strength ratio made monolithically and composite, and to investigate crack and failure pattern of composite slab. The testing was conducted on two groups of slab which has 1:1 scales. Each group consists of three. The first group was monolith slab as control speciment. The second group was composite slab withsurface roughing. The test was conducted on two step. The first step, speciment was loaded by the repeated center static loading (10 cycle), the second step, the speciment was loaded from zero and increased step by step until speciment failed. Testing results showed that the first crack load of composite slab was approximately 14,2 % (width of 200 mm), 10,61 % (width of 400 mm), and 22,64 % (width of 600 mm) less than monolith slab. The ultimate (failure) load of composite slab was about 32,2 % (width of 200 mm), 9,8 % (width of 400 mm), and 15,9 % (width of 600 mm) less than monolith slab. The cracks occurred at slab speciment was vertical cracks extending through tensile side. The crack was indicated flexural crack, while the kind of failure type occurred at slab speciment was flexural failure.

PERBAIKAN PERILAKU KUAT TEKAN BETON AIR RAWA DENGAN METODE PENYARINGAN AIR Elhusna Elhusna; Agustin Gunawan
Inersia: Jurnal Teknik Sipil Vol 6, No 1 (2014)
Publisher : Universitas Bengkulu

Concrete building construction is easier and more economical when using local material including the water. This article is about improving swamp water by filtering it to use in concrete production. As the comparator is concrete with drinking water from The local water supply utility (PDAM) of Bengkulu. The 15 cm cubes specimens were tested at the age of 7, 14, 21, and 28 days to find out the compressive strength at different ages. The concrete was designed with water cement ratio 0.5, slump value 6-10 cm and maximum aggregate 20 mm. The casting and curing specimens were done according to SNI 03-2493-2002. The compressive strength results showed that the filtered swamp water concrete and the unfiltered one at 28th day were 98,2% dan 90,1% to the PDAM one. The trend of the compressive strength of swamp water concrete tend to decline with the increasing age. The compressive strength of swamp water concrete at age of 28th day was 89,1% lower than the strength at the age of 7th day. The filterred swamp water made the concrete compressive strength better.

PENGARUH PEMANFAATAN PECAHAN TERUMBU KARANG SEBAGAI PENGGANTI AGREGAT HALUS TERHADAP KUAT TEKAN BETON Adika Kurniawan; Yuzuar Afrizal; Agustin Gunawan
Inersia: Jurnal Teknik Sipil Vol 8, No 2 (2016)
Publisher : Universitas Bengkulu

Fractional reef has similarities with fine aggregate used as a substitute fine aggregate in theconcrete mix. This study aims to determine the optimal percentage of replacement fragments ofcoral reefs as a substitute for fine aggregate of compressive strength of concrete at 28 days.Test specimen using a slump of 0.6 fas 60-100 cube measuring 15 cm x 15 cm x 15 cm by 20samples. Variation replacement coral fragments used were 25%, 50%, 75% and 100% of theweight of the volume of fine aggregate. The results of the study of fine aggregate replacement with shards of coral reefs have increased the compressive strength of normal concrete. The percentage increase in the compressive strength of concrete for a variation of 3.024% P25replacement, replacement of variation of 6.61% P 50, P 75 variations replacement of 9.219 andvariations replacement P 100 at 1.220%.

KAJIAN PENAMBAHAN ABU CANGKANG SAWIT TERHADAP KUAT TEKAN BATA MERAH Deltiana Rosalia; Elhusna Elhusna; Agustin Gunawan
Inersia: Jurnal Teknik Sipil Vol 5, No 1 (2013)
Publisher : Universitas Bengkulu

This study was aimed to determine the effect of adding palm shell ash to the red brick compressive strength. Palm shell ash is pozzolanic and contains about 60% silica and when it is mixed with clay bricks, the strength become stronger. This study used two methods of treatment of the palm shell ash, oven and unoven. Bricks was made in this study using SII-0021-1978, while the red brick compressive strength was tested in this study using SNI 03-4164-1996. TheSpecimens were 146 cubes with a size of 5 cm on each side. The Variations in ash were used as an added ingredient of red brick at 0%, 4,3%, 8,6%, 12,9%, 17,2% and 21,5%. Specimens molded and dried for about 1 week and then burned in a red brick factory. The test results showed the addition of oven and unoven palm shell ash was increased the compressive strength of red brick. The addition of unoven palm shell ash was decreased the water absorption of the red brick and made the red brick lighter. The Lightest weight of the brick occurred in 8,6% of unoven palm shell ash was 12.96% of the normal one. The bigest compressive strength occured in 4,3% oven palm shell ash that was 112.82% of the normal red bricks. The smallest water absorption occurs in 8,6% of unoven palm shell ash was 18.07% of the normal red bricks.

ANALISIS GELOMBANG TERHADAP STRUKTUR BANGUNAN BREAKWATER TEGAK PANTAI TAPAK PADERI BENGKULU Besperi Besperi; Agustin Gunawan; Mawardi Mawardi
Inersia: Jurnal Teknik Sipil Vol 6, No 2 (2014)
Publisher : Universitas Bengkulu

This research is aimed to find out characteristic of waves and significant wave happened in breakwater building as the reference in analyzing the dimension of standing breakwater type. The researcher used wind data analysis and visual measurement of wave. Based on the analysis, the researcher found that the waves were fully developed seas condition. This condition was caused by fetch value which was long enough, so the height of wave reached maximum value. The lengths of fetch was 200 km and the significant height of wave (Hs) was 2,85 meters and the significant wave period (Ts) was 8,48 seconds. The stress force (p) was 46,274 tons and the moment (Mp) was 185,094 tonmeters. The lift force (U) was 11,674 ton and the moment (Mu) was 31,131 tonmeter.

Pembuatan Pupuk Kompos Mandiri dari Limbah Organik untuk Tanaman Pekarangan Rumah di RT. 18 Kelurahan Pematang Gubernur Fepy Supriani; Agustin Gunawan; Yuzuar Afrizal
Abdi Reksa Vol. 4 No. 2 (2023)
Publisher : UNIVERSITAS BENGKULU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/abdireksa.4.2.67-71

Sampah organik adalah sisa sayur, kulit pisang, buah yang busuk, kulit bawang yang didapat dari aktifitas rumah tangga. Sampah organik kering yang memiliki air lebih sedikit yaitu kayu, ranting pohon, kayu dan daun–daun kering. Sampah organik yang tidak diolah akan menimbulkan bau busuk dan penyakit. Permasalahan sampah limbah rumah tangga juga terjadi di Perumahan RT. 18/2 kelurahan Pematang Gubernur. Setiap rumah di RT. 18 masih menyisahkan tanah untuk pekarangan yang oleh masyarakat ditanami berbagai macam tanaman. Jenis tanah yang kurang baik menyebabkan tanaman tidak tumbuh subur. Pengelolahan sampah organik dapat diupayakan agar menjadi budaya di tingkat lingkungan terkecil. Sampah organik berguna untuk bahan kompos pencampur media tanam. Pembuatan sampah organik dapat dibuat secara mandiri sehingga dapat digunakan langsung untuk tanaman di pekarangan rumah, dan jika dikembangkan dapat menambah nilai ekonomis pendapatan rumah tangga. Tujuan dari kegiatan pengabdian ini adalah membangkitkan kesadaran masyarakat tentang pengolahan sampah dengan sasaran ibu rumah tangga untuk memanfaatkan sampah organik dalam pembuatan kompos mandiri yang dapat digunakan langsung sebagai media tanam dipekarangan rumah. Metode yang digunakan adalah melakukan sosialisasi dan melakukan praktik langsung pembuatan pupuk kompos dari sampah organic , tanah dan bioaktivator (cairan EM4) dalam wadah compost bag. Untuk menggerakkan ibu rumah tangga untuk langsung mempraktekkan diserahkan compost bag dan cairan EM4 sebagai sarana penunjang.Hasil dari kegiatan ini adalah meningkatnya kesadaran masyarakat terhadap kebersihan lingkungan, memberikan ketrampilan dalam pembuatan kompos yang dapat digunakan langsung untuk tanaman di pekarangan rumah dan jangka panjang dapat memberi nilai ekonomis untuk masyarakat. Kata kunci: pengelolahan sampah, pekarangan rumah, sampah organic, kompos, cairan EM4

Analisis Kekuatan Kolom Komposit Terbungkus Beton Berpenampang Bundar terhadap Kapasitas Tahanan Aksial dan Momen dengan Metode Beda Hingga Rizki Aidil; Mukhlis Islam; Ade Sri Wahyuni; Agustin Gunawan; Yuzuar Afrizal
Inersia: Jurnal Teknik Sipil Vol. 16 No. 1 (2024)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/ijts.16.1.21-28

Composite column structures can provide high strength from the combination of two or more materials with different material properties which then provide better combined properties. This research was conducted by analysing the composite column structure with finite difference method and comparing the results with CSiCol application. The results of the analysis of the Pn and Mn interaction diagram of the finite difference method composite column when compared to the CSiCol application composite column have a maximum percentage difference for the maximum Pn value of 19.17%, the maximum Mn value of 2.90%. The difference in the Pn and Mn values of the composite column can be corrected with a regression equation using a linear correction factor and a Polinomial correction factor, with a maximum Pn percentage difference value of 8.93% for the linear correction factor and 6.84% for the Polinomial correction factor value. Therefore, the finite difference method can be used to analyse composite columns with relatively good accuracy provided that correction factors are used.

Co-Authors Ade Sri Wahyuni Adika Kurniawan Agung Rizki Pratomo Anggun Lia Anestri Bambang Supriyadi Besperi Besperi Deltiana Rosalia Dofi Hendro Fogi Elhusna Elhusna Fepy Supriani Kurnia Iriani Mawardi Mawardi Mukhlis Islam Reizki Darmawan Rizki Aidil Sherly Marlia Suprapto Siswosukarto Yuzuar Afrizal

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