Plasma-Metal Inert Gas (MIG) hybrid welding was employed to carry out bead on plate of an aluminum alloy A5052. The plasma arc ignited form a keyhole, and series systems were developed starting with MIG welding. convective patterns within the weld pool meticulously analyzed. In addition, we conducted experimental observations flow inside surface pool, able visualize in some areas. results indicated that side formed seamlessly integrated side. At same time, observed formation integrates both...

In seawater, cement-treated soil undergoes accelerated deterioration owing to enhanced calcium leaching caused by magnesium salts. The of progresses gradually from the surface in contact with necessitating extended periods for investigating properties after laboratory tests. However, an method has not been developed. This study examines effects Mg concentration immersion water (0.94–23.45 g/l) and specimen dimensions (2.0–5.0 cm diameter) on rate. aim is accelerate production deteriorated...

This study explores the use of volcanic glass powder (VG) derived from Shirasu deposits as a substitute for silica fume (SF) in producing high-strength precast concrete piles with compressive strength 123 MPa. Initially, mortar specimens varying VG replacement ratios and curing temperatures were prepared to assess their strength. After identifying optimal mix conditions mortars, incorporating produced. Subsequent testing revealed that ratio 20% by cement volume temperature 70 °C achieving...

We investigated the use of waste glass fiber-reinforced plastic (GFRP) to remove dye from industrial wastewater. The adsorbent material, based on GFRP/clay ceramics, was produced by mixing crushed GFRP with clay and firing resulting mixture. Several types ceramics were adjusting ratio clay, 40% GF/GFRP, atmosphere. Adsorption tests methylene blue (MB) performed into an MB solution while controlling stirring speed measuring decrease in concentration over time. These results showed that...

To utilize waste glass fiber-reinforced plastic (GFRP) and to reduce environmental pollution in rivers lakes, we developed a filtering material that can clean contaminated water. The high strength porous nature of ceramic made by mixing clay crushed GFRP before firing was exploited do so. Various specimens with different pore size distributions were changing the ratio GFRP, particle size, mixture temperature. Bending permeability tests indicated several types ceramics good permeabilities...

The cleaning action in AC TIG welding is attributed to the oxide film removal process caused by cathode spots. Clarifying behavior mechanism of these spots will enable control action. However, has not yet been experimentally clarified. This study reports that observations high-speed video camera revealed absence at center molten pool, when shot vicinity a pool after using helium as shield gas on aluminum plates.

“Akahoya” is a volcanic soil classified as special deposited in Kyushu, Japan. Many of its properties are not yet clearly understood. We found that Akahoya had the potential to adsorb bacteria cattle feces, which prompted us investigate material and perform experiments comprehensively evaluate adsorption performance for various fine particles such acidic basic dyes, NOx/SOx gas, phosphoric acid ions, addition bacteria. very high specific surface area owing large number nanometer-sized pores...

This study is aimed at the development of civil engineering materials such as pavement blocks and building tiles that can moderate heat island phenomenon. achieved by exploiting properties material porous structure, high water absorption capacity strength ceramics produced mixing clay crushed waste glass fiber-reinforced plastic (GFRP) before firing. Fundamental properties, pore size distribution, capacity, solution pH after ceramic immersion, bending strength, freezing resistance...

To reuse waste glass fiber-reinforced plastics (GFRPs), porous ceramics (i.e., GFRP/clay ceramics) were produced by mixing crushed GFRP with clay followed firing the resulting mixture under different conditions. The possibility of using fired a reducing atmosphere as adsorbent materials to remove NOx and SOx from combustion gases fossil fuels was investigated because high porosity, specific surface area, contents fibers plastic carbides ceramics. NO2 SO2 adsorption tests conducted on several...

Bora is a granular volcanic pumice with certain degree of hardness. In this study, we investigated the possibility using fired as substitute for fine sand in mortar. The objective was to develop lightweight pavement block extremely high permeability Bora. Initially, changes hardness and density particles at different temperatures were examined. bending strength mortar containing aggregate also evaluated. Subsequently, fabricated permeable hybrid structure, comprising porous material...

ABSTRACT Akahoya is a volcanic soil rich in alumina, primarily deposited Kyushu, Japan. We have found that adsorbs bacteria the water surrounding cattle grazing areas, suggesting potential for environmental purification. This study investigated spectrum of microorganisms adsorbed by using column filled with through which suspension was passed. Shirasu soil, another different chemical composition, used as control. effectively diverse range including Escherichia coli , Campylobacter jejuni...

Glass cullet (GC) generated from the disposal of photovoltaic (PV) panels are typically landfilled, and effective GC utilization methods must be established for PV generation. In this study, alkali-activated material (AAM) mortars were prepared paste fine blast-furnace slag powder, fly ash, sodium orthosilicate (SO) mixed with crushed sand to investigate potential use as a aggregate in AAM. The replacement did not considerably affect flowability mortar, whereas compressive strength decreased...

The effective reuse of waste glass fiber-reinforced plastic (GFRP) is desired. We previously produced porous ceramics by firing mixtures crushed GFRP and clay in a reducing atmosphere demonstrated their applicability as adsorbents for the removal basic dyes from dyeing wastewater. However, primary influencing factors dye adsorption mechanism have not been fully elucidated, acidic direct has clarified. In this study, tests were conducted, effects atmosphere, specific surface area, type dye,...

To utilize waste glass fiber-reinforced plastic (GFRP), we have created porous ceramics by mixing crushed GFRP with clay and then firing the resultant mixture. Some GFRP/clay great porosity, which allows water to pass through them. In this study, exploiting high strength permeability of ceramics, aimed develop water-permeable paving blocks that could prevent inundation roads sudden heavy rains in urban areas. Various specimens were made adjusting ratio (40–60 mass%), particle size,...

To recycle silica byproducts and to moderate the heat-island phenomenon, a porous ceramic was prepared by mixing waste powder with clay, then firing resultant mixture. By exploiting high water-absorption capacity of resulting ceramic, greening material in which covered moss produced. The suppression effect temperature increase caused solar-radiant heat on moss-covered investigated quantitatively using following procedure. First, surface change water-absorbing sample during reception, amount...

Polystyrene microcapsules were prepared by using the solvent evaporation method from S/O/W emulsion which contains fine particles of CaCl2 in organic phase. The fractionated their size and permeability wall settling difference methanol. Further, phase change materials that have two different wet-ability characters successfully impregnated. hydrophobic compound was easily impregnated to material. Meanwhile, hydrophilic compound, is salt hydrate, not same via direct impregnation but hydrate...

In this study, we developed materials with high adsorption and removal performance of NO_2 gas, thereby decreasing air pollution, by exploiting the porous nature ceramics produced when clay crushed waste GFRP are mixed before firing. First, examined gas abilities various materials, such as metals, plastics, wood, mortar, made from clay. The results indicated that have ability for gas. We then firing mixtures GFRP. containing at 20 to 60% total mass ability. These may be used pavement blocks...

To recycle glass fiber reinforced plastic (GFRP) discarded as industrial waste, we have proposed a process that produces porous fiber-reinforced ceramics by mixing clay and crushed waste before the mixture is fired. This study was aimed at development of turbid filtering material can decrease environmental pollution exploiting ceramic properties. Various specimens with different porosity distributions were made changing ratio GFRP, particle size firing temperature mixtures. The permeability...