Effect of Additive Silicon Powder on Physical Property of Cold Ramming Paste for Aluminum Electrolysis

2012 ◽  
Vol 512-515 ◽  
pp. 421-424
Author(s):  
Xiao Hua Yu ◽  
Ning Fang ◽  
Yong Gang Li ◽  
Gang Xie ◽  
Lin Tian
Keyword(s):  
Compressive Strength ◽  
Electrical Resistivity ◽  
Physical Properties ◽  
Physical Property ◽  
Aluminum Electrolysis ◽  
Silicon Powder ◽  
Volume Density ◽  
Medium Temperature ◽  
Anthracene Oil

The cold ramming paste for aluminum electrolysis has been studied using electrically calcined anthracite as aggregate, medium temperature pitch and anthracene oil as binder, metallic silicon powder as additive in the paper. The effects of addition of silicon on volume density, compressive strength, electrical resistivity, shrinkage value have been studied. The results show that: volume density, compressive strength of cold ramming paste are increased firstly and then decreased with the addition of silicon increasing, and electrical resistivity, shrinkage value are decreased firstly and then increased with the addition of silicon increasing. So when the addition of silicon is 3%, the physical properties are preferable.

A New Ecofriendly Cold Ramming Paste for the Aluminum Electrolysis Cell

2011 ◽  
Vol 399-401 ◽  
pp. 1208-1213
Author(s):  
Yang Min Zhou ◽  
Lin Tian ◽  
Gang Xie ◽  
Rong Xing Li ◽  
Xiao Hua Yu
Keyword(s):  
Thermal Decomposition ◽  
Compressive Strength ◽  
Electrical Resistivity ◽  
Infrared Spectrum ◽  
Physical Properties ◽  
Gas Phase ◽  
Phenol Formaldehyde ◽  
Aluminum Electrolysis ◽  
Electrolysis Cell ◽  
Artificial Graphite

Cold ramming paste was successfully synthesized used electro-calcined anthracite (ECA) and artificial graphite as aggregate and phenol-formaldehyde (PF) resin as binder. Synthesized paste was measured by electrical resistivity, compressive strength, Infrared Spectrum (IR) and Thermo Gravimetry (TG), etc. The results show that the synthesized paste has some excellent physical properties such as low electrical resistivity and high compressive strength, all of which can meet industry requirements. Thermal decomposition and condensation of the paste can be divided into four stages by TG. Finally, it is found that the synthesized cold ramming paste is an ecofriendly material by the toxicity measurement of gas phase escaping from the heated paste

Clinical Performance and Physical Properties of Twelve Amalgam Alloys

1978 ◽  
Vol 57 (11-12) ◽  
pp. 983-988 ◽  
Author(s):  
J.W. Osborne ◽  
E.N. Gale ◽  
C.L. Chew ◽  
B.F. Rhodes ◽  
R.W. Phillips
Keyword(s):  
Compressive Strength ◽  
Physical Properties ◽  
Failure Rate ◽  
Clinical Performance ◽  
Physical Property ◽  
One Year

An assessment of the marginal failure rate of 1,041 restorations of twelve alloys was made at one year. In addition, physical property tests were conducted. A correlation was found between the clinical performance and creep (.79), flow (.62) and 24-hour compressive strength (.60).

Predicting material properties of concrete from ground-penetrating radar attributes

2020 ◽  
pp. 147592172097699
Author(s):  
Isabel M Morris ◽  
Vivek Kumar ◽  
Branko Glisic
Keyword(s):  
Compressive Strength ◽  
Physical Properties ◽  
Ground Penetrating Radar ◽  
Material Properties ◽  
Regression Models ◽  
Physical Property ◽  
Portland Cement Concrete ◽  
Instantaneous Amplitude ◽  
Data Set ◽  
Ground Penetrating

We present here a laboratory-based experimental protocol that seeks to establish and characterize the relationship between ground-penetrating radar attributes and the mechanical properties (density, porosity, and compressive strength) of typical industry concrete mixes. The experimental data consist of ground-penetrating radar attributes from 900 MHz radargrams that correspond to simultaneously measured physical properties of Portland cement concrete, alkali-activated concrete, and cement mortar. Appropriate regression models are trained and tested on this data set to predict each physical property from ground-penetrating radar attributes. From a small selection of individual attributes, including total phase and intensity, trained random forest regression models predict porosity ( R2 = 0.83 from the instantaneous amplitude), density ( R2 = 0.67 from the intensity attribute), and compressive strength ( R2 = 0.51 from instantaneous amplitude). These novel relationships between physical properties and ground-penetrating radar attributes indicate that material properties could be predicted from the attributes of ordinary ground-penetrating radar scans of concrete.

Experimental approaches to estimate concrete properties with ground penetrating radar

2019 ◽  
Author(s):  
Isabel M. Morris ◽  
Vivek Kumar ◽  
Claire E. White ◽  
Branko Glisic
Keyword(s):  
Compressive Strength ◽  
Physical Properties ◽  
Ground Penetrating Radar ◽  
Feature Detection ◽  
Assessment Tool ◽  
Physical Property ◽  
Learning Approaches ◽  
Destructive Testing ◽  
Physical Property Data ◽  
Ground Penetrating

<p>When faced with the problems of aging infrastructure and historic constructions, there are many unknowns such as physical properties and arrangements of materials. This information is necessary for estimating the capacity, safety, and overall condition and for ensuring successful maintenance or repair of the structure. Often, this information is only available through invasive means, which can be unsightly, legally prohibited, or too expensive. Ground penetrating radar (GPR) is a noninvasive assessment tool successful at infrastructure inspection, feature detection, and condition assessments. An experiment was designed to investigate the ability of GPR to predict the physical properties (compressive strength, young’s modulus, and porosity) of concrete samples. A set of samples with variable properties and mix designs was fabricated. The samples were tested both with traditional methods (physical destructive testing) and by noninvasive GPR scanning at 7, 14, 28, and 56 days. A variety of machine learning approaches were used to investigate correlations between the physical property data and the GPR data, resulting in a model that predicts the density, compressive strength, and porosity of concrete with some success (R<span>2</span>-values between 0.4 and 0.8). This predictive model is currently being further developed and tested on several case studies.</p>

Effect of Sintering Temperature on the Physical Properties and Microstructure of In Situ Nitrides Bonded MgAl2O4-C Refractories

2016 ◽  
Vol 697 ◽  
pp. 591-594
Author(s):  
Shao Hua Wang ◽  
Cheng Ji Deng ◽  
Hong Xi Zhu ◽  
Wen Jie Yuan
Keyword(s):  
Compressive Strength ◽  
Physical Properties ◽  
Bulk Density ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Silicon Powder ◽  
Flake Graphite ◽  
High Quality ◽  
Liquid Calcium

The in situ nitrides bonded MgAl2O4-C refractories were prepared by using high quality fused spinel (MgAl2O4≥ 97%), natural flake graphite (C ≥ 96%) and silicon powder (Si ≥ 98%) as raw materials and the liquid calcium lignosulfonate with a concentration of 1.25 g/ml was used as binder (4 wt%). The effect of sintering temperatures on physical properties and phase compositions were investigated. The results show that β-sialon and α-Si3N4were formed in the samples sintered at 1400°C, 1450°C and 1500°C, and AlON and AlN were formed in the samples sintered at 1550°C. The sample that sintered at 1450°C exhibits the best bulk density and apparent porosity of 2.84 g/cm3 and 14.73%, respectively, and the highest compressive strength

The Variation of Physical Properties in Frozen Soils at Various Freezing Temperatures

2014 ◽  
Author(s):  
YoungSeok Kim ◽  
Kiju Kim ◽  
Seung-Seo Hong ◽  
Wanjei Cho
Keyword(s):  
Mechanical Properties ◽  
Electrical Resistivity ◽  
Wave Propagation ◽  
Physical Properties ◽  
Physical Property ◽  
Research Station ◽  
Frozen Ground ◽  
Frozen Soils ◽  
Recent Climate ◽  
Freezing Temperatures

Due to the recent climate change, the colder and longer winter is expected in Korea. Besides, the recent participation agreement on the development of the natural gas pipeline in Russia and construction of the second Korean Antarctic research station, the Jangbogo station changes the research interests from the seasonally frozen ground to the permafrost ground. The recent development of the site investigation techniques using wave propagation and electrical resistivity enabled engineers to evaluate the physical properties of the frozen soils and further correlate them to the mechanical properties. However, the physical properties of the frozen ground change when the water in the soil solidifies to ice; this change is particularly notable between 0 and −10°C. Therefore, the physical property changes due to freezing needs to be investigated in terms of wave propagation characteristics and electrical resistivity with regard to the various freezing temperatures. In this study, the characteristics of wave propagation and electrical resistivity of frozen soils are investigated under various sub-zero temperatures. The characteristics of wave propagations are analyzed in terms of compression and shear wave velocities. The electrical resistivity is measured under various sub-zero temperatures to understand the effects of ice, which will further provide the valuable information about the location of the active layer. Furthermore, the evaluated physical properties can be used as basic data for the evaluation of the mechanical properties such as strength and stiffness.

scholarly journals Physical, Mechanical and Durability Properties of Ecofriendly Ternary Concrete Made with Sugar Cane Bagasse Ash and Silica Fume

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1012
Author(s):  
Laura Landa-Ruiz ◽  
Aldo Landa-Gómez ◽  
José M. Mendoza-Rangel ◽  
Abigail Landa-Sánchez ◽  
Hilda Ariza-Figueroa ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Electrical Resistivity ◽  
Portland Cement ◽  
Physical Properties ◽  
Silica Fume ◽  
Sugar Cane ◽  
Sugar Cane Bagasse ◽  
Conventional Concrete ◽  
Durability Properties ◽  
Sugar Cane Bagasse Ash

In the present investigation, the physical, mechanical and durability properties of six concrete mixtures were evaluated, one of conventional concrete (CC) with 100% Portland cement (PC) and five mixtures of Ecofriendly Ternary Concrete (ETC) made with partial replacement of Portland Cement by combinations of sugar cane bagasse ash (SCBA) and silica fume (SF) at percentages of 10, 20, 30, 40 and 50%. The physical properties of slump, temperature, and unit weight were determined, as well as compressive strength, rebound number, and electrical resistivity as a durability parameter. All tests were carried out according to the ASTM and ONNCCE standards. The obtained results show that the physical properties of ETC concretes are very similar to those of conventional concrete, complying with the corresponding regulations. Compressive strength results of all ETC mixtures showed favorable performances, increasing with aging, presenting values similar to CC at 90 days and greater values at 180 days in the ETC-20 and ETC-30 mixtures. Electrical resistivity results indicated that the five ETC mixtures performed better than conventional concrete throughout the entire monitoring period, increasing in durability almost proportionally to the percentage of substitution of Portland cement by the SCBA–SF combination; the ETC mixture made with 40% replacement had the highest resistivity value, which represents the longest durability. The present electrical resistivity indicates that the durability of the five ETC concretes was greater than conventional concrete. The results show that it is feasible to use ETC, because it meets the standards of quality, mechanical resistance and durability, and offers a very significant and beneficial contribution to the environment due to the use of agro-industrial and industrial waste as partial substitutes up to 50% of CPC, which contributes to reduction in CO2 emissions due to the production of Portland cement, responsible for 8% of total emissions worldwide.

scholarly journals KARATERISTIK SIFAT FISIKA BAMBU TALI (GIGANTOLOCHLOA APUS KURZ ), SEBAGAI BAHAN BAKU BAMBU KERAJINAN

2020 ◽  
Vol 3 (1) ◽  
pp. 69
Author(s):  
Febriana Tri Wulandari
Keyword(s):  
Moisture Content ◽  
Physical Properties ◽  
Dimensional Stability ◽  
Raw Materials ◽  
Physical Property ◽  
Axial Direction ◽  
Volume Density ◽  
Poor Quality ◽  
Bamboo Species

The centre of bamboo crafts in Gunung Sari District is the largest bamboo centre in West Lombok Regency. One of the bamboo species which is usually used as raw materials is tali bamboo. Studies of physical properties of this bamboo have not been carried out resulting poor quality of bamboo crafts. The physical property was essensial information which would be used for enhancing the products because it correlated with dimensional stability of the bamboo. The objectives of this study were to identify the physical properties of the bamboo with reference to the axial direction. The experiment design was complete random design employing the axial directions (bottom, middle, and top portions) as treatments. The statistical analyses were Anova with range tests at α = 5%. The results showed that the physical properties were: fresh moisture content 51-119.82%; air-dried moisture content 13.03-15.04%; fresh volume density 0.51 – 0.72; air-dried volume density 0.62 – 0.75; oven volume density 0.63 – 0.78. Axial directions of the physical properties were not significantly different except for the fresh moisture content. Therefore all portions of tali bamboo (bottom, middle, and top portions) could be utilized as raw materials for bamboo crafts.

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

COLMONOY No. 83 PTA

Alloy Digest ◽  
1995 ◽  
Vol 44 (12) ◽  
Keyword(s):  
Wear Resistance ◽  
Compressive Strength ◽  
Physical Properties ◽  
Tungsten Carbide ◽  
Tensile Properties ◽  
Powder Metal ◽  
Application Method ◽  
Plasma Transferred Arc ◽  
Transferred Arc ◽  
Nickel Base

Abstract COLMONOY No. 83 PTA is a nickel-base hard surfacing alloy containing tungsten carbide. The application method is plasma transferred arc and the application is designed to protect extrusion screws. This datasheet provides information on composition, physical properties, microstructure, hardness, tensile properties, and compressive strength. It also includes information on wear resistance as well as machining and powder metal forms. Filing Code: Ni-493. Producer or source: Wall Colmonoy Corporation.

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