scholarly journals Synthesis and Mechanical Testing of Calcium Aluminosilicoferrite Crystals with High Alumina Content

Metals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 906 ◽  
Author(s):  
Roland Mežibrický ◽  
Tamás Csanádi ◽  
Gerlinde Habler ◽  
Mária Fröhlichová ◽  
Ján Dusza ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Iron Ore ◽  
Raw Materials ◽  
Alumina Content ◽  
High Alumina ◽  
Al Content ◽  
Cube Corner ◽  
Minor Influence ◽  
High Silica ◽  
Materials Used

Due to the gradual shift to less rich iron ores, the alumina content in the raw materials used for iron-making is progressively increasing, affecting the mineralogy and the properties of iron ore sinters. In this context, the effect of Al content on the mechanical properties of calcium aluminosilicoferrites Ca2(Ca,Mg,Fe)6(Fe,Si,Al)6O20 (SFCA), which is the most important bonding phase in iron ore sinters, is of particular interest. In this study, high-alumina calcium aluminosilicoferrites were synthesized and their mechanical properties were determined by nanoindentation using a cube-corner indenter. For synthesis, different raw materials were taken as proxies for the adhering layer in a sinter granule. Three mixtures were prepared, high-iron, high-silica, and high-alumina and heated in an alumina crucible, which was used to simulate the high-alumina nucleus in a granule. The different raw materials used for synthesis had only minor influence on the compositions of the synthesized ferrites. All ferrites showed similar mechanical behavior during indentation, indicating that neither the chemical nor the mechanical properties were affected by the different compositions of the adhering layer, when the sinter granule is dominated by a high-alumina nucleus. The crystallographic orientation of the tested grains had only minor influence on the results of the nanoindentation experiments.

Development of the New Generation Materials for the Soft Pipe Lining Rehabilitation

2005 ◽  
Author(s):  
Hsin Her Yu ◽  
Min-Hsun Cheng ◽  
Rong-Yuan Jou ◽  
Kuang-Chyi Lee ◽  
Chien-Chang Lin
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resins ◽  
Potable Water ◽  
Raw Materials ◽  
Trade Mark ◽  
Power Cables ◽  
Different Types ◽  
Materials Used ◽  
New Generation ◽  
Optimum Sample

With increasing global urbanization and industrialization, many more pipelines for gas, potable water, sewer, oil, and power cables have been installed underground, underwater, in buildings and in factories. Maintenance of such pipelines is crucial. However, it is often difficult and has become a growing problem these days. The PALTEM-HL (Trade mark and stands for Pipeline Automatic Lining SysTEM, Hose Lining Method), a pipeline relining system, was developed as an effective and inexpensive solution for this problem. In this project, we try to develop a new resins and the adhesives system to replace the raw materials used in the PALTEM-HL system. Anionic harder combined two different types of epoxy resins were investigated in this study. After curing, the mechanical properties and glass transition temperature of the mixture were examined and the optimum sample preparation prescription was also found. FTIR (Fourier Transform Infrared Spectroscopy) and DSC (Differential Scanning Calorimeter) were employed to monitor the curing process of the mixtures. The mechanical properties of the mixture were also measured by Instron and micro Vickers.

Comparison of Mechanical Properties of Fly Ash Artificial Geopolymer Aggregates with Natural Aggregate

2015 ◽  
Vol 754-755 ◽  
pp. 290-295 ◽  
Author(s):  
Alida Abdullah ◽  
Ku Amirrul Rahman Ku Yin ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Kamarudin Hussin ◽  
Mien Van Tran
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Specific Gravity ◽  
Water Absorption ◽  
Raw Materials ◽  
Construction Materials ◽  
High Water ◽  
Natural Aggregate ◽  
Materials Used ◽  
The Impact

This study was conducted to compare the mechanical properties of fly ash artificial geopolymer aggregates with natural aggregate (rock) in term of its impact strength, specific gravity and water absorption.The raw materials used were fly ash, sodium hydroxide, sodium silicate and natural aggregate. After the artificial geopolymer aggregate has been produced, its water absorption, specific gravity and aggregate impact test has been done. All results obtained were compared to natural aggregate. The result shows that the fly ash geopolymer aggregate are lighter than natural aggregate in term of its specific gravity. The impact value for fly ash artificial geopolymer aggregate slightly high compared to natural aggregate while it has high water absorption value compared to natural aggregate. As conclusion, the fly ash artificial geopolymer aggregate can be used as one of the construction materials in concrete as an alternative for coarse aggregate besides natural aggregate with more lightweight properties.

scholarly journals Use of Plastic Aggregates in Concrete

2019 ◽  
Vol 9 (1) ◽  
pp. 4406-4412
Keyword(s):  
Mechanical Properties ◽  
Carbon Dioxide ◽  
Fly Ash ◽  
Construction Industry ◽  
Negative Impact ◽  
Raw Materials ◽  
Waste Products ◽  
Waste Plastic ◽  
Coarse Aggregates ◽  
Materials Used

There is no doubt concrete is most useful thing in construction industry but it has a negative impact also, just like a coin has two faces. Raw materials used in manufacturing of concrete affects the environment in one or the another negative way. Like manufacturing of cement produce carbon dioxide whereas the production of aggregates adds dust to the environment. Production of coarse aggregates also impact the geology of the area from they were extracted. A step taken in this direction is the use of waste products along with or in replacement of cement. Many of these materials are already in use, like silica fume, fly ash etc. In this study, plastic coarse aggregates were used in place of natural coarse aggregates. Plastic aggregates were produced by little processing of waste plastic. Plastic is the biggest threat to the environment, and it is affecting the environment rapidly. Some recent studies show that it can be used construction industry due to some of its properties like inert behavior, resistance to degradation etc. Also use of waste plastic can help in reducing plastic waste Various experiments were performed to test the mechanical properties of the concrete with plastic coarse aggregates. Concrete was prepared using plastic coarse aggregates in varying proportions of 0, 2.5, 5, 7.5 and 10%

SIFAT FISIK DAN MEKANIK PAPAN PARTIKEL DARI LIMBAH PLASTIK JENIS HDPE (High Density Polyetylene) DAN RANTING/CABANG KARET (Hevea brasiliensis Muell.Arg)

2011 ◽  
Vol 3 (1) ◽  
pp. 7
Author(s):  
Sari Mirad Noor
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Raw Materials ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Plastic Waste ◽  
High Density ◽  
Different Types ◽  
Materials Used ◽  
The Impact

The need of log increace rapidly, mean while forest product decrease, so efficiency on wood process should be done wisely, in the other hand plastic waste is uncompossed material, become an environmental problems. This research aims to determine the impact of particles of type HDPE plastic wastes and twigs/branches of rubber on some physical and mechanical properties of wood. Physical properties have been tested for water content, density, thickness, and water absorption. Although mechanical properties tests were tough Broken/Module of Rufture (MOR) and the preservation of architecture/modulus of elasticity (MOE).     The raw materials used are polyethylene of high density of waste plastic and rubber adhesive urea formaldehyde branch branch. Experimental design used the randomized Completely Design (RCD) 5 x 4, in which each treatment became much like 5 times replicated).The treatment used is the diversity of the composition of the waste of plastic of different types of polyethylene of high density provides a significant effect on the content of water, water absorption, the density and the development of thickness. With regard to the persistence and the fracture of the arch determination not to give a significant effect.Keywords: physical and mechanical properties, particle board, HDPE plastic waste, branch/twig of  rubber.

Effects of different ammonium lignosulfonate contents on the crystallization, rheological behaviors, and thermal and mechanical properties of ethylene propylene diene monomer/polypropylene/ammonium lignosulfonate composites

TAPPI Journal ◽  
2020 ◽  
Vol 19 (1) ◽  
pp. 9-17
Author(s):  
RUI GOU ◽  
MINGHUI GUO
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Raw Materials ◽  
Core Layer ◽  
Thermoplastic Elastomer ◽  
Ethylene Propylene Diene Monomer ◽  
Dynamic Vulcanization ◽  
Ethylene Propylene ◽  
Al Content ◽  
Wide Range

Thermoplastic elastomer (TPE), made from ethylene propylene diene monomer (EPDM) and poly-propylene (PP) based on reactive blending, has an excellent processing performance and characteristics and a wide range of applications. However, there are currently no reports in the literature regarding the usage of TPE in making composite boards. In this paper, EPDM, PP, and ammonium lignosulfonate (AL) were used as the raw materials, poly-ethylene wax was used as the plasticizer, and a dicumyl peroxide vulcanization system with dynamic vulcanization was used to make a new kind of composite material. This research studied the influences of the AL contents on the crystallization behaviors, rheological properties, thermal properties, and mechanical properties of the composites. The results showed that the AL content had a noticeable impact on the performance of the composite board. Accordingly, this kind of composite material can be used as an elastomer material for the core layer of laminated flooring.

scholarly journals Strategies and Challenges for Successful Implementation of Green Economy Concept: Edible Materials for Meat Products Packaging

Foods ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 3035
Author(s):  
Roxana Gheorghita Puscaselu ◽  
Liliana Anchidin-Norocel ◽  
Ancuţa Petraru ◽  
Florin Ursachi
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Food Industry ◽  
Raw Materials ◽  
Meat Products ◽  
Green Economy ◽  
Successful Implementation ◽  
Packaging Materials ◽  
Meat Industry ◽  
Materials Used

Currently, the problem of pollution due to plastic waste is a major one. The food industry, and especially that of meat and meat products, is intensely polluting, both due to the raw materials used and also to the packaging materials. The aim of the present study was to develop, test, and characterize the biopolymeric materials with applications in the meat industry. To obtain natural materials which are completely edible and biodegradable, different compositions of agar, sodium alginate, water and glycerol were used, thus obtaining 15 films. The films were tested to identify physical properties such as smell, taste, film uniformity and regularity of edges, microstructure, color, transmittance, and opacity. These determinations were supplemented by the evaluation of mechanical properties and solubility. According to the results obtained and the statistical interpretations, three films with the best results were used for packing the slices of dried raw salami. The salami was tested periodically for three months of maintenance in refrigeration conditions, and the results indicate the possibility of substituting conventional materials with the biopolymer ones obtained in the study.

Physical Properties of Porous Clay Ceramic-Ware

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
A. K. Plappally ◽  
I. Yakub ◽  
L. C. Brown ◽  
W. O. Soboyejo ◽  
A. B. O. Soboyejo
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Raw Materials ◽  
Ceramic Materials ◽  
Ceramic Ware ◽  
Strength Development ◽  
Similar Materials ◽  
Ceramic Manufacture ◽  
Materials Used ◽  
Clay Ceramics

The focus of this study is on the physical properties of clay ceramic materials compatible for drinking water filtration. A multiparameter lognormal multivariate regression approach is proposed for assessing the combined effects of quantity of compositional constituent of raw materials used in ceramic manufacture on toughness. The approach was validated for two specimen types (T- and S-specimens) derived from a circular base of the frustum shaped, porous clay ceramic ware (PCCW). The PCCW were manufactured from clay and sieved sawdust mixed at distinct volume fractions. The variation of the porosity and density of the PCCW was studied with respect to the amounts of sawdust and clay used in the manufacturing. The research helped to clearly define the roles of clay and sawdust quantities for strength development in both T- and S-specimen. A generalized experimental approach is proposed for estimation of mechanical properties of clay ceramics as a function of the material constituent fractions. A polynomial relationship was developed between the compressive strength and density of the PCCW material. The statistical model expressions developed herein may be used for the prediction of material and mechanical properties of similar materials, including natural and engineered materials.

scholarly journals Comparative Microstructural Study on Mechanical Properties of Concrete Enhanced with Graphite and Graphene Compound

2018 ◽  
Vol 7 (4.5) ◽  
pp. 91
Author(s):  
P. Sudheer ◽  
Dr S. Chandramouli
Keyword(s):  
Mechanical Properties ◽  
Raw Materials ◽  
Chemical Properties ◽  
Nano Materials ◽  
Nano Technology ◽  
Microstructural Investigation ◽  
Before And After ◽  
Materials Used ◽  
Physical And Chemical ◽  
And Chemical Properties

The present study is based on nano technology and came up with the idea of introducing nanoparticles in the raw materials used for construction. Nano materials are available in three principal shapes 0, 1 and 2 Dimensional nanoparticles. 0D and 1D nanofibers are such as carbon nanotubes and nanosilica compounds. This study has investigated the physical and chemical properties of graphite and graphene compound and its applicability in construction industry.  Graphene has created interest as it is believed to improve the strength of concrete allowing the possibility of controlling properties of concrete. In this work graphene is used as a reinforcing additive in cement-based mortar and concrete. Own Graphene compound is prepared using conventional graphite and concentrated hydrogen peroxide in the laboratory due to the unavailability of graphene. As a part of microstructural investigation, SEM and EDS analysis on graphite and graphene compounds before and after implementation are carried out in the laboratory. Then the two compounds are replaced as a part of small percentage in cement mortar cubes casted for various proportions. The mechanical properties of cement-based composites are studied after incorporating of graphite and graphene compounds at low dosages in concrete and then the results are compared. 

scholarly journals A POSSIBILITY OF SYNTHESIS OF HIGH-ALUMINA CEMENTS FROM DIFFERENT RAW MATERIALS

2013 ◽  
Vol 4 (1) ◽  
Author(s):  
Dragica Lazić ◽  
Dragana Kešelj ◽  
Jelena Penavin Škundrić ◽  
Ljubica Vasiljević ◽  
Janko Mikić
Keyword(s):  
Solid Phase ◽  
Raw Materials ◽  
Xrd Analysis ◽  
Sodium Aluminate ◽  
Raw Material ◽  
Al2o3 Content ◽  
High Alumina ◽  
Aluminate Solution ◽  
Tricalcium Aluminate ◽  
Materials Used

Calcium aluminate cements with high Al2O3 content are synthesized from different raw materials. Raw materials used in the synthesis include: lime, tricalcium aluminate hexahydrate, aluminum hydroxide and sodium aluminate solution. The preparation of raw material mixture for sintering was performed in two ways: the first method of preparation of a raw material mixture was by mixing powdered components (Al(OH)3 and CaO, Al(OH)3 and 3CaO·Al2O3·6H2O), another method included stirring into the liquid phase (NaAlO2, CaO and Al (OH)3) for a certain period of time at the temperature of 90°C, whereby the obtained solid phase was used as raw material for sintering. Chemical and mineralogical analysis (XRD) were performed on the cements obtained in synthesis. Based on chemical analysis it was concluded that the cements obtained were CAC 70 and CAC 80, as the Al2O3 content in these cements ranged from 70 to 75.37% for the first type, while the second type had a range of 77-79%. XRD analysis showed that the dominated minerals in cement CAC 70 were CaO• Al2O3 and CaO • 2Al2O3, and in cement CAC 80, mineral CaO • 2Al2O3, which is consistent with the findings published on these cements.

scholarly journals Study on the Effect of Production Parameters and Raw Materials Used on the Mechanical Properties of Leaded Brass (CuZn40Pb2) Alloy

2017 ◽  
Vol 05 (02) ◽  
pp. 340-349 ◽  
Author(s):  
Abdulsalam A. Fadhil ◽  
Tawakol A. Enab ◽  
Magdy Samuel ◽  
Berlanty A. Iskander ◽  
Sami A. Ajeel
Keyword(s):  
Mechanical Properties ◽  
Raw Materials ◽  
Production Parameters ◽  
Materials Used
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