The Pozzoolanic Activity Level of Powder Waste Glass in Comparisons with other Powders

2015 ◽  
Vol 660 ◽  
pp. 237-243 ◽  
Author(s):  
Ofelia Corbu ◽  
Adrian M. Ioani ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Vasile Meiţă ◽  
Henriette Szilagyi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Glass Powder ◽  
Waste Glass ◽  
Activity Level ◽  
Raw Material ◽  
X Ray ◽  
The Third ◽  
Cement Mortars ◽  
Program Objective ◽  
Scanning Electron

In order to streamline the mixes of concrete with powder waste glass as small as < 0.250 mm, a postdoctoral program objective was to test the activity rate of its pozzoolanic reaction, through various methods and by comparing it with other powders reactions in a standardized cement composition. The first method was to determine the compressive strength of cement mortars, partially substituted by glass powder, silica fume, ash and clay. The second method was determining the chemical composition of the powder with fluorescence X-ray, XRF type. The third method, was based on fragments of mortar studied and subjected to microscopic observations – SEM determination (scanning electron microscopy) to investigate the microstructure of the raw material.

Preliminary Preparation and Characterization Studies of Cellulose from Merbau (Intsia bijuga)

2012 ◽  
Vol 620 ◽  
pp. 314-319
Author(s):  
Nur Amira Mamat Razali ◽  
Fauziah Abdul Aziz ◽  
Saadah Abdul Rahman
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Alkaline Treatment ◽  
Raw Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
Preliminary Preparation ◽  
Characterization Studies ◽  
Scanning Electron

Hardwood is wood from angiosperm trees. The characteristic of hardwood include flowers, endosperm within seeds and the production of fruits that contain the seeds. This paper aims to discuss the preparation and characterization of cellulose obtained from hardwood. The hardwood Merbau (Intsia bijuga) was chosen as raw material in this study. Alkaline treatment and delignification methods were used for the preparation of cellulose. Acid hydrolysis was employed to produce cellulose nanocrystal (CNC). The treated and untreated samples were characterized using x-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The final product, from both trated and untreated samples were then compared.

scholarly journals MICRO-MECHANICAL PERFORMANCE OF CONCRETE USED AS RECYCLED RAW MATERIAL IN CEMENTITIOUS COMPOSITE

2017 ◽  
Vol 13 ◽  
pp. 55 ◽  
Author(s):  
Vladimír Hrbek ◽  
Veronika Koudelková ◽  
Zdeněk Prošek ◽  
Pavel Tesárek
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Industrial Pollution ◽  
Mechanical Performance ◽  
Structural Parameters ◽  
Raw Material ◽  
Cementitious Composite ◽  
X Ray ◽  
The Impact ◽  
Scanning Electron

The reduction of industrial pollution is recently one of main goals over all fields. In civil engineering, re-cycling of structural waste provides wide opportunity contributing this effort. This paper focus on re-use of concrete waste, which after further processing can be used in new constructions as partial supplement to the mixture. To investigate the impact of re-cycled concrete addition, it is necessary to determine mechanical and structural parameters of individual phases in the “raw” material. For this purpose, grid indentation and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM, EDX) are combined to determine properties of concrete sample.

Synthesis of Coal Dust Depressor and its Application in Preventing Coal Dust

2012 ◽  
Vol 482-484 ◽  
pp. 2301-2306 ◽  
Author(s):  
Fang Qin Cheng ◽  
Shu Yan Cheng ◽  
Yan Xia Guo ◽  
Li Qiong Cao
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Coal Dust ◽  
Raw Material ◽  
Surface Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
Stock Pile ◽  
Scanning Electron

A novel coal dust depressor was prepared by alkalization and etherficayion reactions using wastepaper as raw material. The sample was characterized by means of FTIR spectroscopy (FTIR)、scanning electron microscopy (SEM)、X-ray diffraction (XRF) and viscometer measurements. The coal dust inhibitor was developed to suppress flying dust over coal dump and conveyor. The result shows that flying coal dust was prevented by intrinsic viscosity of coal dust depressor which was sprayed on the surface stock pile can make the surface material bond with each other to form layer of crust, having a role of dust prevention. Application of the coal dust depressor can reduce the losses of coal and protect the environment from being polluted.

Prepared of Flower-Like CuO via CTAB-Assisted Hydrothermal Method

2010 ◽  
Vol 152-153 ◽  
pp. 909-914 ◽  
Author(s):  
Yun Ling Zou ◽  
Yan Li ◽  
Nan Zhang ◽  
Jian Gang Li
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Hydrothermal Method ◽  
Cetyltrimethylammonium Bromide ◽  
Raw Material ◽  
Monoclinic Structure ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Scanning Electron

Flower-like CuO nanostructures have been prepared via cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal method. Here, CuCl2•2H2O was used as copper raw material, and sodium hydroxide was used as precipitate. The resulting CuO powders were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). X-ray diffraction (XRD) pattern exhibited the nanocrystalline nature with monoclinic structure for the as-synthesized nanostructures. FESEM images indicated that the flower-like CuO nanostructures are composed of many interconnected nanosheets in size of several micrometers in length and width and 60-80 nm in thickness. The possible formation mechanism of flower-like CuO nanostructures was discussed.

Characterization of Fluorescent Lamp Glass Waste Powders

2012 ◽  
Vol 727-728 ◽  
pp. 1579-1584 ◽  
Author(s):  
Alline Sardinha Cordeiro Morais ◽  
Thaís Cristina da Costa Caldas ◽  
Sérgio Neves Monteiro ◽  
Carlos Maurício Fontes Vieira
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Glass Powder ◽  
Fluorescent Lamp ◽  
Glass Waste ◽  
X Ray ◽  
Fluorescent Lamps ◽  
Clay Body ◽  
Scanning Electron

Industrialized component wastes, regularly discarded by the society, are increasingly contributing to the environmental pollution. The glass of these lamps is contaminated with mercury, which a serious hazard due to conventional recycling by melting with other glasses. A possible solution could be its incorporation into a clay body to fabricate common fired ceramics such as bricks and tiles. The objective of this work is to characterize a type of glass to be incorporated into a clayey ceramic. The glass analyzed was obtained from fluorescent lamps, which was passed through mercury decontamination process and ground into powder. This glass powder was tested for X-ray fluorescence, DTA/DTG, optical microscopy, scanning electron microscopy and optical dilatometry. The results showed that the glass presents sintering and softening points around 650 °C and 800 °C, respectively. The chemical analysis indicated the presence of impurities in considerable amounts in the composition of the fluorescent lamp glass waste.

The Evaluation of the Primary Circuit Passivation Layer Formed After Hot Functional Tests at the EMO3

2020 ◽  
Author(s):  
Pavel Kus ◽  
Martin Krondak ◽  
Martin Skala ◽  
Alena Kobzova ◽  
Petr Brabec ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Ph Value ◽  
Passivation Layer ◽  
Primary Circuit ◽  
Functional Tests ◽  
X Ray ◽  
The Third ◽  
Scanning Electron

Abstract The presented article outlines and describes the processes involved in the creation and testing of the passivation layer that was created during hot functional tests at the third unit of NPP Mochovce. The article is divided into several sections. In the first section is the description of the hot tests on the third block, in particular the chemical regime, i.e the formation of hydrogen or the necessary adjustment of the pH value. The second section of the article describes the evaluation of the passivation layer using instrumental techniques, i.e. Raman microscopy, Scanning electron microscopy, X-Ray Photoelectron Spectroscopy and others. The results obtained by using these techniques provided a comprehensive view of the resulting layer and clearly defined it's structure. The measurement revealed that a passivation layer was formed, the inner layer of which is enriched with a chrome element. The upper part of the passivation layer was composed of iron oxides, mainly magnetite.

Creation of electro-conductive paths and patterns by screen printing on textile bases

2016 ◽  
Vol 88 (3) ◽  
pp. 261-274 ◽  
Author(s):  
Barbara Filipowska ◽  
Błażej Wiśniewski ◽  
Lucyna Zawadzka Michalak
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Screen Printing ◽  
Surface Resistance ◽  
Microscopic Analysis ◽  
Raw Material ◽  
Energy Dispersive ◽  
X Ray ◽  
Scanning Electron

This article presents a number of possible approaches to creating electro-conductive paths and patterns on flat textiles with various structures and raw material compositions. A modifier was selected and the process of creating the electro-conductive paths by screen printing was optimized. The result of this process was evaluated by the measurement of surface resistance and by microscopic analysis using scanning electron microscopy with energy dispersive X-ray spectroscopy. The durability of the obtained effect was evaluated by analyzing electro-conductive paths after multiple washing cycles and after rubbing.

Scanning Electron Microscopy and X-Ray Microanalysis. J. Goldstein, D. Newbury, D. Joy, C, Lyman, P. Echlin, E. Lifshin, L. Sawyer, and J. Michael. Kluwer Academic, Plenum Publishers, New York; 2003, 688 pages (Hardback, $75.00) ISBN 0-306-47292-9

2003 ◽  
Vol 9 (5) ◽  
pp. 484-484 ◽  
Author(s):  
Sandy Burany
Keyword(s):  
Electron Microscopy ◽  
New York ◽  
Scanning Electron Microscopy ◽  
Specimen Preparation ◽  
X Ray ◽  
The Third ◽  
Scanning Electron

It is a pleasure to review the third edition of Scanning Electron Microscopy and X-Ray Microanalysis. The 15 chapter book can be divided into three sections: (1) scanning electron microscopy, (2) X-ray microanalysis, and (3) specimen preparation.

Chemically Treated Submicron Illite Clays for Product with Improved Strength

2015 ◽  
Vol 1117 ◽  
pp. 152-155
Author(s):  
Liga Grase ◽  
Gundars Mezinskis ◽  
Inta Vitina
Keyword(s):  
Electron Microscopy ◽  
Raw Materials ◽  
Nitrogen Adsorption ◽  
Raw Material ◽  
Industrial Minerals ◽  
X Ray Diffraction ◽  
Adsorption Method ◽  
X Ray ◽  
Different Temperatures ◽  
Scanning Electron

A variety of industrial minerals, such as kaolinite, feldspars, and etc., have been used as solid raw materials in the geopolymerization technology. The illite-containing raw material in this study was obtained by the use of sedimentation method. Clay and dust fractions was subjected to the treatment with NaOH alkaline solution and afterwards treated at different temperatures. Results obtained by X-ray diffraction, Scanning electron microscopy, nitrogen adsorption method confirmed the usability of Liepas deposit homogenized gray and red clays for possible realization of geopolymer method.

Crystallinity and Morphological of Cellulose Extraction from Elaeis guineensis Jacquin Frond

2015 ◽  
Vol 819 ◽  
pp. 251-255
Author(s):  
M. Muhammad Safwan ◽  
Hui Lin Ong ◽  
Hazizan Md Akil
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Field Emission ◽  
Microcrystalline Cellulose ◽  
Elaeis Guineensis ◽  
Raw Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bleaching Treatment ◽  
Scanning Electron

The work described in this paper is the extraction of microcrystalline cellulose from Elaeis Guineensis Jacquin Frond using alkaline and bleaching treatment. Microcrystalline cellulose extracted has been characterized by X-Ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM). Morphological investigation of fibers was performed using field emission scanning electron microscopy (FESEM) where rod like fiber can be observed. Crystallinity of cellulose extracted was found higher than raw material.

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