قائمة الطعام
A variant of the sol−gel method is used to successfully synthesize nanosilica particles starting from silica sand. The resulting particles are in the size range of 16−37 nm with great purity.
Abstract. Silica is the name given to a group of minerals composed of silicon and oxygen, the two most abundant elements in the earth's crust. Silica is found commonly in the crystalline state and ...
Abstract. The purification of Tronoh silica sand is an important step in expanding technical applications of this silica sand. However no research on purifying of Tronoh silica sand has been reported. This study is focused on ball milling technique as a preliminary technique for Tronoh silica sand purification. The objectives are to study the ...
Abstract. The amorphous mesoporous silica was successfully synthesized from Jordanian desert glass sand sources. Sodium silicate solution (SSS) was …
Abstract: Industrial silica sand is a by-product obtained from the industries like paint, paper, rub-ber etc. It has a similar property with river sand and& M sand. This study explores the effect of high content of silica sand as a partial replacement for fine aggregate for concrete making in con-struction purpose.
Upgradation of silica percentages in regular river bar sands of Bangladesh by physical separation were carried out and successfully compared with a few glass sand deposits (Rajib et al., 2009 ...
Abstract Citations (107) References (23) Co-Reads Similar Papers ... NASA/ADS. Coating of silica sand with goethite: preparation and analytical identification Scheidegger, A.; Borkovec, M.; Sticher, H.
Abstract: Industrial silica sand is a by-product obtained from the industries like paint, paper, rub-ber etc. It has a similar property with river sand and& M sand.
Abstract. The environmental impacts of cement manufacturing are becoming a real-time issue that requires attention. This paper investigates the mechanical and physical …
Problem statement. This study investigates the relationship between heating and humidity of silica sand materials in vibrating drying machines. Hence, a prototype of drying plant for one-meter length is designed, including choosing the parameters of the drying machine and computing the factors that affect drying process in addition to …
The average annual production of raw silica sand in Croatia in the period from 2006 to 2011 amounted to 150 thousand tons. This paper presents cradle to gate LCA results of three different types ...
Abstract The amorphous mesoporous silica was successfully synthesized from Jordanian desert glass sand sources. Sodium silicate solution (SSS) was synthesized from glass sand, then silica nanoparticles (SNPs) was synthesized, using sodium silicate solution as a precursor by sol-gel method. The synthesized mesoporous silica has a …
[Show full abstract] with shear strength of about 30kPa and well graded silica sand at about 35% relative density were employed in a rigid container to simulate local site effects. Several ...
Abstract. Silica sand, (almost) pure quartz sand, is a valuable and scarce mineral resource within the shallow Dutch subsurface. High-grade deposits are exploited in the southeasternmost part of ...
It is reported that silica sand fills the pores by reducing the Ca(OH) ... Nano-silica is a material with a small size Abstract This study presents the effect of nano-silica (NS) from sandblasting ...
Geological Overview of White silica Sands. January 2013. Authors: Abdelrahman Ahmed. Technische Universität Berlin. …
Part 1 Silica Sand Spread a sample of silica sand across the drying tray one particle thick subsequent to determining the mass of the drying tray. Wet the sample with water from a spray until the surface of the sand is thoroughly wet. ... Siliziwe Dipa abstract communication 221099425; Physics 1 Note Book, Leigh G, CPUT (2)
Abstract: The production of glass in Poland, especially of container and flat glass, has constantly risen for at least 30 years. New investments in this sector, which have recently been completed or are ... Silica sand is valued for its physical and chemical properties, especially a very high SiO2 content; a very low impurities content; as ...
The study of compaction of high-silica sand of varying density along the height profile of the die will be the subject of a forthcoming study with the aim of analysing die stamping …
Abstract. Silica sand samples from Fetra area in Blue Nile Basin were collected for revealing their physicochemical properties and industrial uses. These samples were characterized by grain size ...
Abstract Due to high usage of tetracycline antibiotics, concerns have been raised about their environmental fate. ... Interestingly, it was found that the rates of degradation of the parent tetracyclines were much faster when silica sand was present in a batch solution or when the solution was passed through a silica column. For example, the ...
Abstract Macroalgae-associated bacteria play an important role in their algal hosts' biological processes. They are localized on surfaces of the host thalli, as well as between and even within algal cells. ... (DGGE) analysis, almost complete removal of epiphytic bacteria on Ulva was obtained simply by co-vortex of seaweeds with silica …
Abstract. This study uses silica sand, which has a high SiO 2 content and micron size as a substitute for normal sand with control specimens with compressive strength of f c ‧ 45 MPa. Two types of silica sand gradations were used, namely 80-100 mesh(0.177 mm - 0.149 mm) in size and 325 mesh (0.044 mm) in size from Bangka as the fine aggregate.
Abstract. The objective of this work was to coat aluminosilicate clays on an inert silica support, and to characterize the properties and stability of the clay–silica coating. Two polymers, polyacrylamide (PAM) and polyvinyl alcohol (PVA), were used to bind kaolinite, illite, and smectite onto silica grains.
The initial purity of silica is 52.1 wt% for desert sand, 39.3 wt% for river sand, and 35.8 wt% for sea sand. High-purity silica has been successfully separated and purified from natural sand via ...
Abstract. Silica nanoparticles (SNPs) have many important applications including anti-reflection coating, self-cleaning surface and drug carriers. They are usually …
The work of Meng et al. [49] tested several differently prepared types of olivine against silica sand in a fluidized bed gasifier, and observed a 5–18% reduction in CO levels when switching from silica sand to olivine due to the olivine acting as an oxygen carrier, which is a similar proportional change to that seen here under a combustion ...
Abstract and Figures. Silica sand is the most commonly used mineral for molding and core making applications in foundry technology due to its availability, thermal and chemical attributes. However ...
Abstract. At present, no refractories are produced in Jordan, but large quantities are imported for use in the lining of furnaces and kilns in the metallurgical industries.The aim of this study is to initiate a program of research for production of silica-refractory bricks from local materials.The raw material, which has been used in this …
The research explored the potential of waste plastics and silica sand for developing thermoplastic composite as floor tiles. The samples were characterized by …
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