A5054971661- Concrete and Cement Materials Research
- Geotechnical and construction materials studies
- Polyoxometalates: Synthesis and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Innovative concrete reinforcement materials
- Metal-Organic Frameworks: Synthesis and Applications
- Zeolite Catalysis and Synthesis
- Membrane Separation and Gas Transport
- Recycling and utilization of industrial and municipal waste in materials production
- Carbon Dioxide Capture Technologies
- Advanced Machining and Optimization Techniques
- Molecular Sensors and Ion Detection
- Inorganic Chemistry and Materials
- Advanced ceramic materials synthesis
- Chemical Synthesis and Characterization
- Innovations in Concrete and Construction Materials
- Biodiesel Production and Applications
- Advanced Nanomaterials in Catalysis
- Material Selection and Properties
- Covalent Organic Framework Applications
- Chemical Synthesis and Reactions
- Magnesium Oxide Properties and Applications
Hiroshima University
2021-2024
Universitas Internasional Semen Indonesia
2016-2020
Abstract Amine-grafted adsorbents are promising CO 2 adsorbents; however, the excessive addition of an amino silane coupling agent during their synthesis increases production cost. Thus, using low amounts silane, we synthesized 3-aminopropyltrimethoxysilane (APTMS)-grafted SBA-15 mesoporous silica and evaluated its adsorption performance. APTMS-grafted samples were prepared either impregnation or heating–filtration method (grafting). The obtained characterized by X-ray diffraction...
All Geopolymer (GP) has been synthesized from bottom ash and rice husk ash. This research aims to determine the effect of Si/Al ratio on geopolymer synthesis. was with various 2, 3 4. The characterization result using XRD SEM indicated that by a different Si/A, it will produce varied structure morphology. Diffractogram shows polymerization done for all samples (GP2, GP3, Gp4) presence hump peak at 2θ = 27-35°. In GP4, no 18° indicating sodalite phase forming. Besides that, morphology higher...
Abstract Lightweight geopolymer concrete was synthesized using fly ash as an aluminosilicate source with the addition of a pore-forming agent. The synthesis conducted by employing various volume ratios paste to foaming agent: 1:0.50, 1:0.67, 1:0.75, 1:1.00, 1:1.33, 1:1.50, and 1:2.00, while aluminum powder weight percentage varied between 0.01 - 0.15 %wt. results showed that higher agent content, lower compressive strength density geopolymer. ratio agent, 1:1.33 found produce strongest light...
Phosphogypsum as industrial waste from phosphoric acid production has great potential a material of added materials concrete. Optimum composition gypsum content can increase the compressive strength and setting time concrete, so it is suitable for use non-autoclaved aerated The experimental design concrete manufacture in this study using Taguchi method. Characteristic method used Higher Better, with controlled factors including Portland cement, phosphogypsum, quicklime. ANOVA test results...
We prepared polyoxomolybdates with methylammonium countercations from monomolybdate, (CH3NH3)2[MoO4], through two dehydrative condensation methods, acidifying in the aqueous solution and solid-state heating. Discrete (CH3NH3)10[Mo36O112(OH)2(H2O)14], polymeric ((CH3NH3)8[Mo36O112(H2O)14])n, ((CH3NH3)4[γ-Mo8O26])n were selectively isolated via pH control of (CH3NH3)2[MoO4] solution. The H2SO4-acidified < 1 produced "sulfonated α-MoO3", ((CH3NH3)2[(MoO3)3(SO4)])n. heating air released...
Abstract Methylammonium paradodecatungstate, (CH 3 NH ) 10 [H 2 W 12 O 42 ] ⋅ n H O, was prepared by the reaction of WO or 4 in aqueous methylamine, followed drying. The 10− anion consists two HW 13 groups containing three edge‐sharing 6 octahedra and 14 having connections. On drying produced material at 70 °C, some lattice water released, but this did not affect structure, although there a decrease unit cell volume. By adding water, loss structural changes were reversed. existence...
The solid-state thermal structure transformation of methylammonium vanadate, (CH
Geopolymer as a water absorbent material has been synthesized from fly ash. This research aims to determine the ability of geopolymer save content with variations NaOH molar ratio. In this research, synthesis was conducted by setting ratio at 3, 4, 5, 6 and 7 M. The resulting characterization done using XRD, FTIR SEM in order characterize structures. Water absorption capacity measured immersing specimens for 24 hours. results show that optimum 3 M, which 11.10%wt.
Sandblasting is a surface treatment that serves to clean the surface, improves adhesion strength and bonding performance, which in process produces silica sand waste. Silica of sandblasting waste can be used as lightweight concrete type Cellular Lightweight Concrete (CLC). The experimental design was factorial find out factors influencing compressive optimum composition with maximum strength. results showed Portland cement ratio foam significantly influenced aggregate. 86.13 kg/cm2 found by...
Geopolymer has been synthesized from fly ash to be applicated as water absorbent material. This research conducted determine the ability of geopolymer abrsop by variation solid – liquid ratio at optimum molarity NaOH; 3 M. In this research, synthesis was solid-liquid ratio; 60:40, 65:35, 70:30, and 75:25. Result treatment were characterized XRD SEM compare structure. Water absorption capacity measured immersing specimens in for 24 hours. Based on result, with maximum absorbed 70:30 13,04 wt%.
PT Petrokima Gresik produces fly ash from coal burning about 8048,89 tons in 2015.In general, one ton of can produce around 0.15 to 0.17 waste.Fly waste be utilized as a mixture where the main elements are aluminum and silica, fulfilling criteria material having cement geopolymer properties.Geopolymer preparation done by sol-gel method at low temperature, emission CO2 gas produced is minimum amount.The problem faced finding right composition so that it maximum compressive strength.One way...
The solid-state heating of methylammonium monomolybdate, (CH3NH3)2[MoO4] (prepared by dissolving MoO3 in an aqueous methylamine solution), air released and water to produce (CH3NH3)6[Mo7O24] followed (CH3NH3)8[Mo10O34] before transformation MoO3. We report the first single-crystal X-ray structural analysis demonstrate that decamolybdate structure is different from obtained ammonium molybdates. Furthermore, a good negative staining reagent for transmission electron microscopy observations...
Amine-grafted adsorbents are promising CO2 adsorbents; however, the excessive addition of an amino silane coupling agent during their synthesis increases cost. We investigated 3-aminopropyltrimethoxysilane (APTMS)-grafted SBA-15 mesoporous silica using low amounts and evaluated its adsorption performance. APTMS-grafted samples were prepared impregnation heating-filtration (grafting) methods. The obtained characterized by X-ray diffraction spectroscopy, transmission electron microscopy, N2...
Sandblasting process by using silica sand will produce waste of at least 70%. Engineering Procurement and Construction (EPC) Industry produces a untreated unused sandblasting from process. Silica is dangerous waste. On the other hand development in Indonesia increase. It takes large amount raw materials to meet needs. One paving block. can be utilized as an alternative material for making In this research, experiment design used Taguchi method. The method determine effect optimum composition...
Beton ringan geopolimer telah disintesis dengan abu layang kelas C (fly ash class C) sebagai sumber aluminosilikat dan penambahan foam agent agen pembentuk pori metode CLC (Celular Lightweight Concrete). Sintesis dalam penelitian ini dilakukan pendekatan Taguchi, yaitu perbaikan produk biaya daya seminal mungkin. Faktor yang diamati adalah rasio pasir, agent, kondisi suhu curing. Metode dijalankan untuk mengidentifikasi faktor berpengaruh signifilkan terhadap kuat tekan melalui analisis...