scholarly journals Characterisation of recycled ceramic mortars for use in prefabricated beam-filling pieces in structural floors

2019 ◽  
Vol 69 (334) ◽  
pp. 189
Author(s):  
P. Rubio de Hita ◽  
F. Pérez-Gálvez ◽  
M. J. Morales-Conde ◽  
M. A. Pedreño-Rojas
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Partial Replacement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ceramic Waste ◽  
Physical Chemical ◽  
Different Types ◽  
Materials Used

This study analyses a procedure to manufacture mortars with different percentages of ceramic waste as partial replacement for aggregates. The study also examines the physical, chemical and mechanical properties of the new mortars, analysing substitution ratios that range from 10% to 50%. Prior to this, all the materials used in the production of the mortar were characterised using X-ray diffraction (XRD) and fluorescence (XRF). The objective was to determine the similarity between different types of ceramic waste, as well as the differences in the minerology and chemical composition with the aggregate. The results of the study show that it is possible to obtain mortars with lower densities compared to the same product with no recycled content. The product’s characteristics make it ideal for the manufacture of prefabricated components for structural floors for rehabilitation works. Finally, the pieces are used in a real rehabilitation case study, highlightining the structural advantages.

Physical and Mechanical Properties of Cement Paste Were Used Partially with Fly Ash and Kaolin Waste

2017 ◽  
Vol 866 ◽  
pp. 199-203
Author(s):  
Chidchanok Chainej ◽  
Suparut Narksitipan ◽  
Nittaya Jaitanong
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Room Temperature ◽  
Physical And Mechanical Properties ◽  
Partial Replacement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lime Water ◽  
Diffraction Patterns ◽  
Iron Mold

The aims of this research were study the microstructures and mechanical properties for partial replacement of cement with Fly ash (FA) and kaolin waste (KW). Ordinary Portland cement were partially replaced with FA and KW in the range of 25-35% and 10-25% by weight of cement powder. The kaolin waste was ground for 180 minutes before using. The specimen was packing into an iron mold which sample size of 5×5×5 cm3. Then, the specimens were kept at room temperature for 24 hours and were moist cured in the incubation lime water bath at age of 3 days. After that the specimens were dry cured with plastic wrap at age of 3, 7, 14 and 28 days. After that the compounds were examined by x-ray diffraction patterns (XRD) and the microstructures were examined by scanning electron microscopy (SEM). The compressive strength was then investigated.

Use of Construction Waste to the Mass Manufacture of Clay Products

2014 ◽  
Vol 798-799 ◽  
pp. 45-49
Author(s):  
Luciana Lezira Pereira de Almeida ◽  
Vivian Ferreira Pereira ◽  
Izabel de Souza Ramos ◽  
Zélia Maria Peixoto Chrispim
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Linear Shrinkage ◽  
Waste Minimization ◽  
X Ray Diffraction ◽  
Construction Ceramic ◽  
Construction Waste ◽  
X Ray ◽  
Sustained Development ◽  
Strength Tests

The objective of this study was to use the waste in the construction ceramic, because it does not degrade in nature due to its chemical composition and a contribution to the reduction of this waste in landfills and visual pollution. Thus, a sample of this material was selected so that their characteristics regarding chemical composition, X-ray diffraction, differential thermal analysis and thermogravimetric analysis could be studied. Mixtures were prepared containing 0%, 5%, 10%, 15% and 20% by weight of waste, and sintered at a temperature of 850 ° C. After water absorption, linear shrinkage and mechanical strength tests were performed. The physical-mechanical properties were determined according to the% of waste added. The results revealed a series of phase transformations during sintering. Moreover, the sintered bodies containing residual construction are likely use in red ceramic, contributing to waste minimization and self-sustained development.

Thermal behaviour of ‘metamorphic vermiculite’ in Ca-rich ancient ceramic sherds and experimental ceramics

2010 ◽  
Vol 74 (4) ◽  
pp. 747-771 ◽  
Author(s):  
C. Rathossi ◽  
P. Tsolis-Katagas ◽  
C. Katagas
Keyword(s):  
Raw Materials ◽  
Thermal Transformation ◽  
White Mica ◽  
X Ray Diffraction ◽  
X Ray ◽  
Maximum Reaction ◽  
Different Types ◽  
Constituent Phase ◽  
Ancient Ceramic ◽  
Materials Used

AbstractA ‘metamorphic vermiculite’-like phase was identified in Ca-rich ancient ceramic sherds from excavations in NW Peloponnese, Greece. Archaeometric investigations have shown that the raw materials used in the production of ancient ceramics were derived from local Plio-Pleistocene sediments. Analysis by X-ray diffraction and scanning electron microscopy-energy dispersive spectroscopy showed that ‘metamorphic vermiculite’ is a common constituent phase of these sediments occurring in three texturally different types: as interstratified white mica-chlorite and chlorite-vermiculite, and white mica-(white mica-chlorite) stacks. In an attempt to elucidate the thermal transformation of ‘metamorphic vermiculite’ present in the calcareous raw materials, we produced experimental ceramics made from these local raw materials and fired them at 700, 750, 850, 950 and 1050°C in a static air furnace. The mixed-layered chlorite-vermiculite was transformed completely at ∼800°C contributing to the formation of new high-Tminerals. The two other types of ‘metamorphic vermiculite’ retain their original lath-like shape up to 1050°C and only a few crystals show that they have undergone complete transformation at this temperature. In the latter crystals, numerous nanocrystals were formed sub-parallel to the former cleavages of ‘metamorphic vermiculite’ pseudomorphs, suggesting their contribution to the nucleation of high-Tminerals (i.e. ferrian aluminian diopside, spinel, Fe oxides) by reactions with the available CaO. It is suggested that the firing conditions (i.e. maximum reaction temperature of 1050°C, reaction time of 1 h, oxygen atmosphere) which promote disequilibrium reactions, and the greater contribution of the white mica constituent against chlorite in some of the initial structures of ‘metamorphic vermiculite’ may be responsible for the delay of its thermal decomposition at 1050°C.

Characterization of Metallic Zirconium Sponge

2014 ◽  
Vol 805 ◽  
pp. 700-705
Author(s):  
Sergio Ciampolini Nogueira de Lima ◽  
Edson Pereira Soares ◽  
Marco Andreoli ◽  
Rubens Chiba ◽  
Emília Satoshi Miyamaru Seo
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Zirconium Oxide ◽  
Vickers Microhardness ◽  
Zirconium Alloys ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metallic Element ◽  
Chemical Purity

When used commercially, the zirconium alloys are utilized in the shape of tubes to encapsulate the UO2 pellets in the PWR and BWR Power reactors. The metallic zirconium is an essential metallic element for the types of alloys in which the obtainment route rests in the ore opening for the production of zirconium oxide followed by the processes of pelletizing, chlorination, purification, reduction and distillation. Through the technique of X-Ray Diffraction the present phases were identified. Using the Fluorescence of an X ray it was possible to determined the chemical composition of the zirconium sponge. The mechanical properties of Vickers microhardness were obtained using a microdurometer. As a result, it was established that it is possible to define a methodology for the preparation of a sample of metallic zirconium for the microstructure analysis, as well as that its chemical purity is 97,265% linked to the microhardness of approximately 51 HV.

scholarly journals Characterization of different types of petroleum refinery spent catalyst followed by microbial mediated leaching of metal values

2021 ◽  
Vol 3 (1) ◽  
pp. 177-187
Author(s):  
Neha Nagar ◽  
◽  
Himanshi Garg ◽  
Chandra Sekhar Gahan ◽  
◽  
...  
Keyword(s):  
Chemical Composition ◽  
Petroleum Refinery ◽  
Metal Recovery ◽  
X Ray Diffraction ◽  
Spent Catalyst ◽  
X Ray ◽  
Different Types ◽  
Spent Catalysts

The present study aims for characterization and classification of five different spent petroleum refinery catalysts followed by metal recovery via bioleaching. The nomenclature given to the different spent catalyst (SC) is SC1, SC2, SC3, SC4 and SC5 collected from an Indian petroleum refinery. All spent catalysts were crushed and ground prior to their characterization by X-Ray Fluorescence for chemical composition followed by X-Ray Diffraction and Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy for their mineralogy. Further, all five spent catalysts were classified based upon their chemical composition and mineralogy. Metal recovery from the spent catalysts was carried out by bioleaching by a mixed microbial consortium of iron and Sulphur oxidizing microorganisms. Most of the spent catalysts showed very significant metal recovery with respect to Ni, Cu, Cr, Mo, Zn, Sr and Ti. The study provides a possible metal recovery route via bioleaching for further testing and scaling up.

scholarly journals PREPARATION SOME ACID-ACTIVATED MONTMORILLONITES FROM CU CHI CLAY AND USING AS CATALYST IN ONE-POT CONVERSION OF BENZALDEHYDE INTO BENZONITRILE

2011 ◽  
Vol 14 (4) ◽  
pp. 43-53
Author(s):  
Dung Duc Pham ◽  
Dat Thanh Vu ◽  
Thach Ngoc Le
Keyword(s):  
Chemical Composition ◽  
Cation Exchange Capacity ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Solid Catalyst ◽  
X Ray Diffraction ◽  
One Pot ◽  
X Ray ◽  
Physical Chemical ◽  
The One

Montmorillonite is a "green" solid catalyst and support used in many organic reactions. In this paper, we have prepared some acid-activated montmorillonites from Cu Chi clay. Then, we determinated physical-chemical properties such as specific surface area, cation exchange capacity, X-ray diffraction, chemical composition and acidity of these samples. Finally, we chose the best from these montmorillonites and used as catalyst in the one-pot conversion of benzaldehyde into benzonitrile under solvent-free and microwave irradiation.

High temperature and high pressure X-ray diffraction study of SAPO-37: effect of chemical composition on the mechanical properties of faujasite-type materials

RSC Advances ◽  
2013 ◽  
Vol 3 (25) ◽  
pp. 9911 ◽  
Author(s):  
Venkata Rajasekhar Buragadda ◽  
Lingying Yu ◽  
Frederico G. Alabarse ◽  
Abel Haidoux ◽  
Claire Levelut ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
High Temperature ◽  
Chemical Composition ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray

Nano Colorful Cement Composite

2013 ◽  
Vol 313-314 ◽  
pp. 103-107
Author(s):  
A. Kazemi Babaheydari ◽  
M. Asad-Zadeh ◽  
F. Mohammadi
Keyword(s):  
Mechanical Properties ◽  
Cement Mortar ◽  
Average Diameter ◽  
Cement Composite ◽  
Partial Replacement ◽  
Gel Formation ◽  
Replacement Level ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sem Study

The purpose of this study is to investigate the strength and mechanical properties of concrete by partial replacement of cement with nano-pigment particles. Nano-pigment particles with the average diameter of 120 nm were used with ten different contents of 0.5%, 0.1%, 1.5% and 4.0% by weight. have been investigated by scan electron microscopy(SEM) ,¬X-ray diffraction(XRD).The results showed that the use of nano- pigment particles up to maximum replacement level of 4.0% produces concrete with improved strength and mechanical properties The SEM study of the microstructures between the cement mortar mixed with the nano-pigment particles and the plain cement mortar showed that the nano-pigment particles as a partial replacement of cement up to 4 wt% could accelerate C–S–H gel formation as a result of the increased crystalline Ca(OH)2 amount at the early ages of hydration.

scholarly journals Effect of incorporation of grits waste on the densification behavior of soil-cement bricks

Cerâmica ◽  
2015 ◽  
Vol 61 (360) ◽  
pp. 414-419 ◽  
Author(s):  
F. B. Siqueira ◽  
J. N. F. Holanda
Keyword(s):  
Portland Cement ◽  
Raw Materials ◽  
Partial Replacement ◽  
Densification Behavior ◽  
X Ray Diffraction ◽  
X Ray ◽  
Kraft Process ◽  
Soil Cement ◽  
Materials Used ◽  
Strength And Durability

Abstract In the cellulose industry the Kraft process is widely used to produce cellulose. This process generates huge volumes of inorganic solid wastes, including the grits waste. In Brazil, the final disposal of this solid waste is of high economical and environmental interest. The present work assesses the influence of the addition of grits waste on the densification behavior of soil-cement bricks. The raw materials used were soil, Portland cement, and grits waste. Soil-cement bricks containing up to 30 wt.% grits waste in partial replacement of Portland cement were prepared by uniaxial pressing and cured for 28 days. The following technological properties were determined: water absorption, compressive strength, and durability. The microstructure was evaluated by scanning electron microscopy and X-ray diffraction. The experimental results indicated that the addition of grits waste influenced positively the densification behavior of the soil-cement bricks. Moreover, the grits waste could be incorporated into the soil-cement brick composition up to 20 wt.% as a partial replacement of Portland cement.

scholarly journals Mechanical Properties of Ceramic Waste as an Alternative Material of Concrete Aggregate

2020 ◽  
Vol 9 (5) ◽  
pp. 1118-1123
Keyword(s):  
Mechanical Properties ◽  
Concrete Aggregate ◽  
Test Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Concrete Aggregates ◽  
Ceramic Waste ◽  
Material Resources ◽  
Alternative Material ◽  
Aggregate Material

The increasing building construction in the field of civil engineering that requires supporting materials, starting in terms of human resources and material resources. Progress in the material field must consider energy-saving aspects. Therefore it is necessary to think about the use of useless materials such as ceramic waste. The purpose of this study is to see the potential of ceramic waste as an aggregate in terms of mechanical properties, with the hope of providing an alternative to concrete aggregates other than natural stone aggregates. Ceramic waste aggregate material testing is done by testing: chemical composition, absorption and water content, specific gravity, soundness, abrasion, granular form, gradation, and X-ray diffraction (X-RD). The test results show that the ceramic waste aggregate (CWA) can be used as a concrete aggregate. Ceramic waste aggregate (CWA) characteristics are sufficient to meet the standards as concrete aggregates according to the SII standard, BSI standard, and ASTM standards. While the X-ray diffraction test (X-RD) shows that no element damages concrete, there is no active silica that can react with alkaline cement and is not as a pozzolan.

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