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All Journal Jurnal Ilmiah Elektronik Infrastruktur Teknik Sipil Jurnal Ilmiah Teknik Sipil
Anak Agung Gede Sutapa
Program Studi Teknik Sipil Fakultas Teknik Universitas Udayana
Civil Engineering, Building, Construction & Architecture

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Journal : Jurnal Ilmiah Teknik Sipil

 1 
POROSITAS, KUAT TEKAN DAN KUAT TARIK BELAH BETON DENGAN AGREGAT KASAR BATU PECAH PASCA DIBAKAR A.A. Gede Sutapa
Jurnal Ilmiah Teknik Sipil Vol. 15, No. 1 Januari 2011
Publisher : Department of Civil Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (106.697 KB)

Abstract

Porosity can be defined as a ratio of pore volume (volume occupied bythe fluid) to total volume of concrete. Porosity in concrete is important to bestudied; especially for materials of seaside buildings and buildings attaching theground. Salt water containing sulfate and chloride can press the pores of concreteso that concrete cracks into loose flakes and its strength reduces. An increase inporosity is thought to associate with a reduced strength of post-burnt concrete.Research was conducted to study the compressive strength, splitting tensile andporosity of post-burnt concrete using cylinders of 150 mm diameter and 300 mmhigh. Burning of samples was carried out after 28 days of age. The burning wasstarted at an oven temperature of 34 º C until it reached a maximum temperature of± 800 º C achieved at minute of 180 and then it held on for another 20 minutes, sothat the burning process lasted for 200 minutes. The test results showed that theincrease in porosity of concrete is proportional to the volume of concrete that hadhot penetration with temperature 400-800 oC. The porosity of concrete increased by20.695%, which resulted in the decrease of compressive strength and splittingtensile strength by 53.665% and 49.641% respectively.
STUDI EKSPERIMENTAL PERILAKU TEKAN PASANGAN BATA DAN BAHAN PEMBENTUKNYA Ida Ayu Made Budiwati; Anak Agung Gede Sutapa; I Kade Era Kurniawan
Jurnal Ilmiah Teknik Sipil Jurnal Ilmiah Teknik Sipil, Vol. 23, No. 2, Juli 2019
Publisher : Department of Civil Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (453.3 KB) | DOI: 10.24843/JITS.2019.v23.i02.p10

Abstract

Dalam perencanaan struktur rangka dinding pengisi (RDP) diperlukan data propertis dari dinding pasangan berupa nilai kuat tekan dan modulus elastisitasnya. Di Indonesia belum tersedia standar nilai dari data propertis pasangan dinding dan material pembentuknya. Penelitian ini dilakukan untuk mengevaluasi dan menambah informasi mengenai karakteristik pasangan bata merah dari produsen bata merah lokal Tulikup. Pengujian karakteristik unit bata merah seperti dimensi, penyerapan air, dan kuat tekan mengacu pada SNI 15-0686-1989 dan kuat tekan mortar menggunakan SNI 03-6825-2002. Dua variasi campuran mortar yang digunakan yaitu perbandingan berat semen portland dan pasir 1:3 dan 1:4. Pengujian pasangan bata merah mengacu pada BS EN 1052-1:1999 untuk menentukan nilai kuat tekan, modulus elastisitas, dan pola retak. Dimensi bata merah Tulikup diperoleh panjang (P) 22,5 cm, lebar (b) 11 cm dan tebal (t) 5,1 cm. Kuat tekan bata merah Tulikup diperoleh sebesar 5,15 N/mm2 dan penyerapan air sebesar 34%. Kuat tekan mortar campuran 1:3 sebesar 24,4 N/mm2 sedangkan campuran 1:4 sebesar 13,4 N/mm2. Kuat tekan karakteristik dan modulus elastisitas pasangan bata merah menggunakan campuran mortar 1:3 dan 1:4 berurutan 1,6 N/mm2, 1,28 N/mm2, 155,94 N/mm2 dan 186,7 N/mm2. Pola retak pasangan bata merah pada pengujian tekan berupa retak vertikal dan pada unit bata merah cenderung retak diagonal.
PERKUATAN KOLOM BULAT BETON BERTULANG DENGAN LAPIS GLASS FIBER REINFORCED POLYMER ( GFRP ) I Ketut Sudarsana; A.A Gede Sutapa
Jurnal Ilmiah Teknik Sipil Vol. 11, No. 1 Januari 2007
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Penelitian ini dilakukan untuk mengetahui pengaruh perkuatan kolom bulat beton bertulang dengan metode jacketing menggunakan Glass Fiber Reinforced Polymer (GFRP) dengan panjang sambungan (overlapping) GFRP yang bervariasi terhadap perilaku keruntuhan, daya dukung aksial dan daktilitas aksial kolom. Sebanyak 21 buah silinder beton dengan diameter 150 mm dan tinggi 300 mm dibuat dan dites. Variasi panjang sambungan GFRP adalah 100%, 150%, 200%, 250% dan 300% dari panjang sambungan hasil perhitungan yang didasarkan pada kuat tarik dan kuat rekatan GFRP. Pengujian dilakukan dengan memberikan beban tekan pada benda uji sampai benda uji mengalami keruntuhan. Data yang dicatat dalam pengujian adalah perilaku runtuh, beban maksimum benda uji dan perpendekan longitudinal benda uji untuk setiap peningkatan beban sebesar 10 kN. GFRP dengan sambungan 100% dan 150% mengalami gagal geser pada sambungan sedangkan GFRP dengan sambungan 200% sampai dengan 300% gagal tarik (putus) di luar sambungan. Hasil pengujian menunjukkan perkuatan kolom bulat beton bertulang dengan metode jacketing/wrapping dengan satu lapis GFRP mampu meningkatkan daya dukung aksial sebesar 11,86% sampai dengan 15,25% dan daktilitas aksial sebesar 12,41 % sampai dengan 47,14%. Abstract: The paper presents an experimental investigation the effect of circular reinforced concrete short columns strengthening using Glass Fiber Reinforced Polymer (GFRP) wrap with variation of overlapping to failure behavior, axial capacity and axial ductility. Twenty one cylindrical concrete specimens with diameters of 150 mm, and 300 mm high were made and tested. Variations of overlapping in this research were 100%, 150%, 200%, 250% and 300 % from overlapping that calculation with GFRP ultimate tension and ultimate debonding strength. Compressive load was applied to the specimens until the specimens failure. Data that note when test were; failure behavior, maximum load and longitudinal strain for every 10 kN increasing load. GFRP with overlapping 100% and 150% failed by sliding (debonding) in overlapping zone, while GFRP with overlapping 200% until 300% failed by broken outside overlapping zone. The experimental results show that circular reinforced concrete columns strengthening by jacketing method/wrapping using one layer of GFRP sheet increasing axial capacity by 11,86% until 15,25% and axial ductility by 12,41% until 47,14%.
PEMULIHAN KEKUATAN TARIK BELAH BETON DENGAN VARIASI DURASI PERAWATAN PASCA BAKAR A.A. Gede Sutapa; I G.N. Oka Suputra; Karnata Mataram
Jurnal Ilmiah Teknik Sipil Vol. 15, No. 2 Juli 2011
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Research on the post-fire concrete immersed in the water expects that its strength can be recovered with a simple and inexpensive ways. By reactivating hydration process, the concrete’s strength can be recovered regardless of the age of the post-fire concrete. The time needed to improve the post-fire concrete strength depends on the immersed time duration in the water. This research is carried out to determine the relationship between the immersed time duration in the water and the level of concrete strength recovery. The average of split tensile strength of concrete post-fire at a temperature of +800 °C is of 31.707% or it is decreased by 68,393%. The splitting tensile strength of post-fire concrete after being immerse in the water during 7, 14 and 28 days are of 64,808%, 67,908% and 56,494% of standard concrete respectively, or decreased by 35,192%, 32.092% and 43.506% respectively. Soaking for 14 days provides the level of recovery of splitting tensile strength of concrete post-fire at its optimum. Soaking longer tends to reduce the recovery rate of tensile strength of concrete post-fire.
Co-Authors I G.N. Oka Suputra I Kade Era Kurniawan I Ketut Jaya Parwita I Ketut Sudarsana Ida Ayu Made Budiwati Nyoman Karnata Mataram Tjok. Gd. Suwarsa Putra