Papers by Keyword: Inorganic Binder

Abstract: Currently, the use of board materials as a material intended for the dry construction of building structure cladding in the building industry has become widespread. The most common types of board materials include wood-based boards (particle, fibre, laminated / plywood, oriented strand boards [OSB]), cement-bonded particleboards and gypsum plasterboards or gypsum fibre boards. In the case of board materials based on inorganic binders, these are most often represented by boards in which the fillers used are bonded by plaster or cement. Wood can then be used as filler, which is predominantly an assortment of inferior-quality trees or comes from a short rotation coppice, treated by various technological processes. Microstructure and material composition have the greatest influence on the physical and mechanical properties of the boards. The use of the boards in the internal or external environment is determined by their individual properties. Another indicator for the possible use of boards is the form of moisture with which the board comes into contact after installation into the structure. For the external environment, the boards have to withstand mainly liquid moisture; in contrast, in an internal environment, the boards come into contact mainly with air humidity. The diffusion properties of the individual products are also crucial for the overall design and use of the boards for structure cladding.

Abstract: In this study,we prepared two kinds of glass frits include CAS and Bi-based glass frit as inorganic binders.Analysis the thermal properties and particle size of the prepared glass frits through DTA analyzer and laser mastersizer.Through sessile drop to research the wetting property between the prepared glass frits and alumina substrate in high temperature,and observe the cross-sections of the sintered samples through scanning electron microscope(SEM) to study their adhesion strength.

Abstract: After reviewing deficiencies of organic foundry binders such as furan, phenolic resin, the author in this paper introduces a new inorganic binder which is colorless and tasteless and does not burn when contacted with liquid metal and has no smoke and other harmful materials to emit into atmosphere. In the paper, the hardening characteristic and properties of inorganic binder nobake and heat hardened sand such as tensile strength, humidity resistance, gas forming and collapsibility are investigated. Foundry trials were carried out to prove that the new binder meets practical requirements.

Abstract: Geopolymers were prepared by using the dried fly ash from industrial by-product, NaOH as alkaline activator and Na2SiO3 as liquid glass. Calcium carbonate from a clam shell was added to provide attachment and growth of environmental organisms on the geopolymers. We investigated the effects of a shell powder contents on the microstructure and bonding properties of the geopolymers to normal cement. The major chemical compositions of fly ash were Si and Al at the ratio of 2 to 1 in wt%. The shell powder with layer sheet consisted of aragonite phase. As increasing the amount of the shell powder, fly ash was not polymerized and remained spherical. The bonding between geopolymers and normal cement was obtained when 0-15 wt% of the shell powder was added. On the other hand, bonding was not achieved with higher shell contents of 20-25 wt%.

Abstract: Apatite nuclei were dispersed in inorganic binder and the apatite nuclei-contained inorganic binder was coated on polyethyleneterephthalate plate. Hydroxyapatite was induced by the apatite nuclei dispersed in the binder and hydroxyapatite layer was formed on the surface of the substrate by soaking in SBF. The hydroxyapatite layer showed high adhesive strength to the substrate.

Abstract: Municipal Solid Waste Incinerator (below MSWI) ash is used to develop inorganic binder for preparing geopolymer concrete in this study. Toxic substituents, such as heavy metals are de-toxificated by above-mentioned new solidity technique. Slag and coal fly ash are used as active filler to enhance compressive strength. MSWI ash was mixed with slag and coal fly ash to make geopolymer concrete. They were solidified under alkali condition and dried at 50°C and 80°C, respectively. Compressive strength was measured to evaluate the characteristics of specimens for the period of 3, 7 and 14 days. Compressive strength measurements show a maximum strength of almost 13.7 MPa after 14 days. The mineral phases of specimen were analyzed by XRD. And the morphology was analyzed by the photo of SEM. The micro-structure of inorganic binder prepared was analyzed by FTIR. Korea Standard leaching Test (KSLT) and TCLP method are used to the environmental safety of inorganic binder. Raw FA measured concentrations of Cu and Pb were 0.30 ppm and 28.31 ppm, respectively. Leaching amounts of heavy metal were noticeably reduced after the solidification of MSWI as with active filler. It is possible to de-toxificate MSWI ash by new solidity techniques. And it may be used as alternative concrete.

Abstract: The coatings composed of colloidal silica, methyltrimethoxy silane (MTMS), water, and acid catalysts have been prepared with variation of colloidal silica contents from 0 to 20 %. All the coatings were prepared and coated on the aluminum plate under the same condition except the contents of colloidal silica, and the compensating contents of MTMS and water with fixed molar ratio of MTMS and water to be 3. The physical properties were compared in terms of hardness, adhesion strength, corrosion, wear resistance, and thermo gravimetry analysis, etc. The pencil hardness was drastically increased with the addition of 5% colloidal silica particles and was further increased slightly by increase of additional silica. The corrosion resistance of the coating film against alkali solution was improved by increasing colloidal silica content, however, the acid resistance was less affected by the content of colloidal silica.

Abstract: Zeolites with different sizes and structures were applied on the surface of cellulose fibers with organic and inorganic binders. The effects of zeolite structure and size and choice of binder on the deodorization rate have been studied. The smaller the particle size, the more effective the deodorization rate of both the zeolite coated cellulose fibers and the powder itself. The deodorization rate depends on both the type and amount of inorganic binder. A silica based inorganic binder revealed higher efficiency on deodorization than silicate based inorganic binder and also higher than organic binders.

Abstract: An aluminum borate whisker (Al18B4O33w) was recognized as an attractive reinforcement for the aluminum alloy, It is good strength, high wear resistance, good thermal stability and low cost, comparable with those of other whiskers such as SiC and Al2O3. In general, aluminum borate whisker reinforced AC4CH alloy composites have been produced by squeeze casting process, which is capable of promoting the higher specific mechanical properties. α+Al18B4O33w/AC4CH (α: SiO2, Al2O3, TiO2sol) composites were fabricated by squeezecasting method in which the molten aluminum infiltrated into the whisker preform. The primary objective of this study was to establish the influence of the fracture toughness of α+Al18B4O33w reinforced composite by different containing inorganic binder. In addition, the fracture mechanism was evaluated through the scanning electron micrographs. As results, fracture toughness the composite containing TiO2 sol was shows plane about 9.28Mpa-m0.5. TiO2 inorganic binder can enhance fracture toughness of the Al18B4O33w reinforced composite. In order to obtain Al18B4O33w reinforced aluminum composites to have good fracture toughness use of TiO2 inorganic binder is recommend.

Abstract: 20 vol.% aluminum borate whisker (Al18B4O33w) reinforced AC4CH alloy composite was fabricated by squeeze casting method. The matrix is controlled its impurities, which make metal alloys, especially AC4CH alloy that is made by restraining 0.2% Iron and aluminum to make a matrix material. The perform of composite materials was made from Al18B4O33w with 5% regulated three kinds of inorganic binders, SiO2, Al2O3 and TiO2 sol, respectively and then sintered at 1373K. The composites were obtained by squeeze cast infiltration of the molten alloy to the perform. Then it was squeeze casting into the matrix. The status of adhesions of whisker perform was Observed by SEM. Micro-Vickers hardness and tensile properties at the room temperature were estimated. Al18B4O33w/ AC4CH composites containing TiO2 sol has excellent properties on tensile properties and microvickers hardness compared with the other composites without inorganic binder, containing SiO2 and Al2O3 sol inorganic binder.