scholarly journals FLUORO​AN​HYDRITE COMPOSITIONS PLASTICIZED BY POLYCARBOXYLATE ESTERS

2020 ◽  
Vol 11 (3) ◽  
pp. 101-105
Author(s):  
Daria A. Kalabina ◽  
Grigorij I. Yakovlev ◽  
Zdenek Dufek ◽  
Grigoriy N. Pervushin ◽  
Kirill A. Bazhenov ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Mechanical Characteristics ◽  
Water Resistance ◽  
Microstructural Analysis ◽  
High Strength ◽  
Expanded Perlite ◽  
Fluid Mixtures ◽  
Water Base ◽  
Physical And Mechanical Characteristics

The influence of a plasticizer based on polycarboxylate esters on the properties of a high-strength fluoroanhydrite composition and a lightweight composition with expanded perlite sand is investigated. It was shown that the addition of 2% polycarboxylate esters on water base to compositions has increased compressive strength and a flexural strength up to 46% and 20% respectively compare to composite without any additives. Due to the structure’s compaction of the compositions, water absorption decreased and the water resistance of the material increased. Microstructural analysis of the compositions confirmed the improvement of physical and mechanical characteristics by changing the morphology of crystallohydrate formations, increasing the contact area between new formations and modifying the structure by carbon nanotubes. The developed mixtures are supposed to be apply for self-leveling fluid mixtures for floors with reduced thermal conductivity.

Promising hybrid fabrics based on carbon and aramid fibers as a reinforcing filler for polymer composites

2019 ◽  
pp. 86-95 ◽  
Author(s):  
G. F. Zhelezina ◽  
V. G. Bova ◽  
S. I. Voinov ◽  
A. Ch. Kan
Keyword(s):  
Composite Material ◽  
Polymer Composites ◽  
Carbon Fibers ◽  
Mechanical Characteristics ◽  
High Strength ◽  
High Modulus ◽  
Hybrid Composite Material ◽  
Hybrid Fabric ◽  
Reinforcing Filler ◽  
Physical And Mechanical Characteristics

The paper considers possibilities of using a hybrid fabric made of high-modulus carbon yarn brand ZhGV and high-strength aramid yarns brand Rusar-NT for polymer composites reinforcement. The results of studies of the physical and mechanical characteristics of hybrid composite material and values of the implementation of the strength and elasticity carbon fibers and aramid module for composite material are presented. 

scholarly journals Concrete Surfacing Using Surface Energy of Nanoparticles

2018 ◽  
Vol 7 (4.7) ◽  
pp. 356 ◽  
Author(s):  
Anastasia Sychovа ◽  
Larisa Svatovskaya ◽  
Dmitriy Starchukov ◽  
Vassily Gera ◽  
Maxim Sychov
Keyword(s):  
Surface Energy ◽  
Mechanical Characteristics ◽  
Dynamic Strength ◽  
High Strength ◽  
Silica Sol ◽  
Alternative Source ◽  
Electron Microscopy Data ◽  
High Dynamic ◽  
Microscopy Data ◽  
Physical And Mechanical Characteristics

This article considers scientific and practical principles of concrete surfacing. As it was found, such production can be done by impregnating the surface of high-strength concrete with silica sol, measuring the surface energy of nanoparticles introduced. A technique was introduced for calculating surface energy of sols, so was the range of energy necessary to create concrete with a shock resistant surface, determined by measurement and calculation. The content contains possible reactions resulting in new phases in the concrete top during the impregnation with silica sol. Physical and mechanical characteristics of surfaced concrete were also outlined ad considered, so were the XRD data and electron microscopy data. Various types of energy used to surface concrete until high dynamic strength were compared. This article provides evidence that surface energy of sol nanoparticles can be considered as an independent alternative source.  

FOAM GLASS GRAVEL MADE OF RECYCLED GLASS WASTE AND SILICON CARBIDE BY MICROWAVE HEATING

2020 ◽  
Vol 26 (3) ◽  
pp. 173-180
Author(s):  
LUCIAN PAUNESCU ◽  
MARIUS FLORIN DRAGOESCU ◽  
SORIN MIRCEA AXINTE
Keyword(s):  
Thermal Conductivity ◽  
Silicon Carbide ◽  
Mechanical Characteristics ◽  
Foam Glass ◽  
Specific Energy Consumption ◽  
Conventional Heating ◽  
Industrial Processes ◽  
Glass Waste ◽  
Recycled Glass ◽  
Physical And Mechanical Characteristics

The paper presents recent achievements in the microwave use for manufacturing foam glass gravel from recycled glass waste and silicon carbide. The aim was to obtain a product with physical and mechanical characteristics almost similar to those of industrially manufactured materials by conventional heating techniques, but with a higher energy efficiency. A foam glass with the thermal conductivity of 0.075 W/m·K and the compressive strength of 7.5 MPa was experimentally obtained. The specific energy consumption was of 1.0 kWh/kg comparable with the industrial processes and it could reach values up to 25% lower by using a high power industrial microwave equipment.

Effect of Surface Vitrification on the Properties of Insulation Board of Expanded Perlite

2017 ◽  
Vol 726 ◽  
pp. 586-590
Author(s):  
Ling Li Li ◽  
Wei Feng Teng ◽  
Jin Cheng Zhang ◽  
Wei Wu ◽  
Qing Yi Shang
Keyword(s):  
Thermal Conductivity ◽  
Physical Properties ◽  
Glass Surface ◽  
High Strength ◽  
Low Density ◽  
Expanded Perlite ◽  
High Quality ◽  
Small Ball ◽  
Stable Performance ◽  
Effect Of Surface

The surface-vitrified and expanded perlite is a new, high-quality insulation materials. It is studied to the effects on performances of the glass surface to expanded perlite insulation board, through comparing with the openings of expanded perlite, expanded and vitrified small ball and surface-vitrified and expanded perlite. A large number of experiments have been done on the physical properties of the insulation board with surface-vitrified and expanded perlite. It shows that the insulation board with surface-vitrified and expanded perlite has a low density, high strength, low water absorption, high obturator rate, low thermal conductivity, stable performance and so on. And the main reason is analyzed.

A New Binding Agent of Na2O-B2O3-SiO2 Syetem Sol for Expanded Perlite Thermal Insulation Board

2011 ◽  
Vol 250-253 ◽  
pp. 502-506
Author(s):  
Jin Xiu Gao ◽  
Xiao Shan Wang ◽  
Lu Bao Li ◽  
Hua Ruan ◽  
Hao Chi Tu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Thermal Insulation ◽  
Water Resistance ◽  
Inorganic Material ◽  
Raw Material ◽  
Expanded Perlite ◽  
Binding Agent ◽  
Volume Weight ◽  
Coefficient Of Thermal Conductivity

In recent years, many buildings went up in flames one after another. It is thought-provoking. So the fire-proof property should be considered into one of the most important performance of the building thermal insulation materials. As a result, the study on the expanded perlite lightweight porous inorganic material heated up fast although its application still has some problems to be solved. In this paper, we take the expanded perlite as raw material to make thermal insulation board, and then study on the effect of volume weight on the coefficient of thermal conductivity and tensile strength. What is more important, we find that a new binding agent of Na2O-B2O3-SiO2 syetem sol contributes to improving its water resistance.

scholarly journals Effect of pulp consistency during refining on physical and mechanical characteristics of handsheets

2021 ◽  
Vol 2094 (5) ◽  
pp. 052035
Author(s):  
A V Ushakov ◽  
Y D Alashkevich ◽  
VA Kozhukhov ◽  
R A Marchenko
Keyword(s):  
Mechanical Characteristics ◽  
Paper Industry ◽  
High Strength ◽  
Strength Properties ◽  
Main Requirement ◽  
Pulp Consistency ◽  
Breaking Length ◽  
The Moment ◽  
Paper Product ◽  
Physical And Mechanical Characteristics

Abstract At the moment, the pulp and paper industry produces a wide variety of types of paper and board, which can serve as an alternative to plastic packaging products. The main requirement for paper packaging is high strength properties, which include: breaking length, resistance to breaking, bursting and tearing. The required strength properties can be ensured at the stage of refining the semi-finished product from which the paper product will be made by changing the consistency of the pulp. Since the influence of the consistency of the pulp during refining on the strength characteristics of the finished product has not been fully studied, it was of interest to find out how the strength properties of castings change when refining the pulp with a change in concentration.

Testing of Carbon Nanotubes and their Influence on the Physical and Mechanical Characteristics of Polyester Resin

2021 ◽  
Vol 887 ◽  
pp. 151-155
Author(s):  
S.G. Shuklin ◽  
I.M. Velm
Keyword(s):  
Carbon Nanotubes ◽  
Mechanical Characteristics ◽  
Polyester Resin ◽  
Testing Machine ◽  
Metal Mesh ◽  
Machine Model ◽  
Scanning Electron Microscopy Measurement ◽  
Microscopy Measurement ◽  
Physical And Mechanical Characteristics

Carbon nanotubes have been studied by scanning electron microscopy. Measurement modes - accelerating voltage 10 kV, current in microscopy mode 10-9 A. The sample was applied to a metal mesh. Spectroscopic data indicate that this sample consists of carbon (peak at 280 eV). There are no other intense peaks in the spectrum; no impurities were detected by this method. Determination of physical and mechanical characteristics was carried out on a testing machine model N5K-S.

Review: Effect of Alloying Element on Al-Si Alloys

2013 ◽  
Vol 845 ◽  
pp. 355-359 ◽  
Author(s):  
Mohd Noor Ervina Efzan ◽  
H.J. Kong ◽  
C.K. Kok
Keyword(s):  
Mechanical Characteristics ◽  
High Strength ◽  
Intermetallic Phases ◽  
Alloying Elements ◽  
Alloying Element ◽  
Alloy Casting ◽  
Good Corrosion Resistance ◽  
Strength Enhancement ◽  
Physical And Mechanical Characteristics ◽  
Cast Products

Al-Si alloys are the most common aluminium cast products owing to their high resistance to hot cracking and excellence fluidity during the molten state. They play important roles in aerospace, automobile and structural industries where high strength to weigh ratio, superior heat conductivity and good corrosion resistance applications are necessary. Alloying elements such as copper, magnesium, zinc and nickel are added into the Al-Si alloys for further strength enhancement. However, impurities such as iron are often present in Al-Si alloys, forming brittle intermetallic phases and hence reducing the mechanical strength of the alloys. In this paper, previous studies on the effects of alloying elements on physical and mechanical characteristics of Al-Si alloys will be accounted. Moreover, a comprehensive review on the Al-Si alloy casting methods will also be included.

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