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Shear strength and deformation of steel fibre-reinforced concrete beams after fire
Antonius, Antonius,Karlinasari, Rinda,Purwanto, Purwanto,Widhianto, Aref Techno-Press 2020 Advances in concrete construction Vol.10 No.2
In this study eleven beam of steel fibre-reinforced concrete were tested on concentrated load in order to evaluate the shear strength and deformation of the beams after burning. Variables considered in the test include spaces of shear reinforcement (stirrups) and temperature (normal temperature at 38℃, 300℃, 600℃ and 900℃). The steel fiber used is set at 0.5% of the concrete volume. The phenomenon of the test results shows that although the beams were tested to achieve shear failure, the fact that all the tested beams did not encounter any shear failure. It has shown the influence of steel fibers and stirrups that plays a role in determining the mode of collapse. The concrete shear capacity of steel fibrous concrete beams installed with stirrups in altered spacing variations is not significantly different from each other, while beam deformability increases when the space stirrups are reduced. Furthermore, models of the developed-steel fibrous shear strength are compared and discussed with experimental results.
Gliding Arc Plasma Processing for Chloromethane Decomposition
( Antonius Indarto ),최재욱,이화웅,송형근 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.1
Chlorinated volatile organic compounds play an important role in the chemical industry both as reaction intermediates and final products. The increasing amounts of chlorinated VOCs released into the environment, together with their suspected toxicity and carcinogenic properties, have increased the demand for finding effective methods of destruction. In order to get high decomposition performance of chloromethane compounds (such as: CH2Cl2, CH3Cl, and CCl4), gliding discharge plasma was used as attractive method due to producing high quality of radical species. The decomposition performance was studied relating to various concentrations of chloromethane, total gas flowrate, and power consumption. 0.5 L quartz cylindrical reactor, with two stainless steel plateselectrode, and high voltage AC power supply were used to achieve the goal of this study. For CCl4 decomposition, it reached 80% (1% of CCl4 at total flowrate 3 lpm) and the main products were Cl2 (selectivity ~77%), CO, and CO2. Conversion of CHCl3 reached 97% at 1% of CHCl3 and total flowrate 3 lpm. The main products were Cl2, CCl2O, CO2 and CO. And, for CH2Cl2, the conversion reached 90% at 2.5% of CH2Cl2 and total flowrate 5 lpm.
P-607 : Methane conversion using gliding arc discharge
( Antonius Indarto ),송형근,최재욱,이화웅 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.2
A study of methane conversion using gliding arc discharge was performed. The main products of reaction were Carbon (C-solid), H2, and, C2H2. The effects of input frequency, power, total flow rate, and CH4/additive gas ratio on conversion and product selectivity were investigated. Methane conversion was enhanced with increasing input power, frequency and decreasing the total gas flow rate. Addictive gas, such as argon and helium, has a great effect on methane conversion and product selectivity. Decreasing ratio of methane gas has increased the methane conversion 47.83% to 61.2% and H2 selectivity 43.67% to 67.5% but decreasing the acetylene (C2H2) selectivity from 27.32% to 11.44%.
Echovirus-7 Infection in Children with Unusual Severe Manifestation: A Case Report
Pudjiadi Antonius Hocky,Antonjaya Ungke,Myint Khin Saw,Alatas Fatima Safira 대한감염학회 2021 Infection and Chemotherapy Vol.53 No.1
We report a rare laboratory-confirmed, clinical case of Echovirus-7 infection in an immuno-competent child with central nervous system and systemic manifestation. Echovirus infection is usually mild, however in this case we identified echovirus-7 infection with 91% homology with the Echovirus-7 strain previously isolated in neighbouring country with severe manifestation.
Treatment of Dichloromethane Using Gliding Arc Plasma
Indarto, Antonius,Choi, Jae-Wook,Lee, Hwaung,Keun Song, Hyung Taylor and Francis 2006 INTERNATIONAL JOURNAL OF GREEN ENERGY Vol.3 No.3
<P>Decomposition of dichloromethane (CH<SUB>2</SUB>Cl<SUB>2</SUB>) using a gliding plasma was examined and reported in this paper. The effects of initial concentrations of CH<SUB>2</SUB>Cl<SUB>2</SUB>, total gas flow rates, and input frequency have been studied to evaluate the performance of gliding arc on CH<SUB>2</SUB>Cl<SUB>2</SUB> decomposition. Using atmospheric pressure air as the carrier gas, experimental results indicate that the maximum conversion of CH<SUB>2</SUB>Cl<SUB>2</SUB> was 95.1% at a total gas flow rate of 180 L/hr containing 1% by volume of CH<SUB>2</SUB>Cl<SUB>2</SUB>. The reaction occurred at an exothermic condition and gaseous products are dominated by CO, CHCl<SUB>3</SUB>, and Cl<SUB>2</SUB>. CO<SUB>2</SUB> and CCl<SUB>4</SUB> are also detected in the product stream in small amounts. The conversion of CH<SUB>2</SUB>Cl<SUB>2</SUB> increases with the increasing applied voltage and decreasing total gas flow rate.</P>
Treatment of CCl 4 and CHCl 3 emission in a gliding-arc plasma
Indarto, Antonius,Choi, Jae-wook,Lee, Hwaung,Song, Hyung Taylor Francis 2006 Plasma devices and operations Vol.14 No.1
<P>The decomposition of the chlorinated hydrocarbons CCl 4 and CHCl 3 in a gliding-arc plasma was examined. The effects of initial concentrations, total gas flow rates and power consumption were investigated. The conversion of the hydrocarbons mentioned above was relatively high. It could reach 80% for CCl 4 and 97% for CHCl 3 . In atmospheric air as a carrier gas, the reaction was exothermic, and the main products were CO 2 , CO and Cl 2 . The transformation into CCl 4 was also detected for the decomposition reaction of CHCl 3 . The conversion of these compounds increased with increasing frequency of power supplied and decreasing total gas flow rate.</P>
CCL4 DECOMPOSITION BY GLIDING ARC PLASMA: ROLE OF C2 COMPOUNDS ON PRODUCTS DISTRIBUTION
Indarto, Antonius,Yang, Dae Ryook,Choi, Jae-Wook,Lee, Hwaung,Song, Hyung Keun Taylor Francis 2007 Chemical engineering communications Vol.194 No.8
<P> The goal of this work is to investigate the role of existing C2 compounds in the plasma reactions of carbon tetrachloride (CCl4) decomposition. The experiment of CCl4 decomposition was carried out by gliding arc plasma. The decomposition products were dominated by CO, CO2, and Cl2. The conversion of CCl4 into Cl2 and (CO + CO2) reaches ∼ 50% and ∼ 40%, respectively. Other chlorinated compounds were suspected to be produced, such as COCl, COCl2, and C2 compounds. In order to prove the existence of those compounds, for example, chlorinated C2 compounds, a kinetic simulation was performed and cross-checked with the experimental results to clarify the reactions mechanism.</P>