Physical and mechanical properties and drying modes of Quercus petraea without artificial humidification in convective drying chambers of periodic actionPhysical and mechanical properties and drying modes of Quercus petraea without artificial humidification in convective drying chambers of periodic action

10.12737/3359 ◽  
2014 ◽  
Vol 4 (1) ◽  
pp. 146-150
Author(s):  
Чернышев ◽  
Aleksandr Chernyshev ◽  
Ефимова ◽  
Tatyana Efimova
Keyword(s):  
Mechanical Properties ◽  
Load Capacity ◽  
Physical And Mechanical Properties ◽  
Quercus Petraea ◽  
Convective Drying ◽  
Operating Parameters ◽  
Annual Rings ◽  
Drying Process ◽  
Periodic Action ◽  
Late Wood

The features of the process and drying modes without artificial humidification of uncut Quercus petraea lumber in convective drying chambers without artificial humidification for furniture and joinery production of premium class is considered. The data of physical and mechanical properties of Quercus petraea, such as density, the number of annual rings and the percentage of late wood are given. The drying process of Quercus petraea was mathematically modeled previously, values ​​of transient humidity and other key operating parameters were obtained, and then practical industrial dryings in one stock chamber with load capacity of 10 cubic metres were carried out.

Physical and mechanical properties and energy-saving modes of drying wood of black alder without artificial humidification in convective drying chambers of periodic action

10.12737/2193 ◽  
2014 ◽  
Vol 3 (4) ◽  
pp. 138-142
Author(s):  
Чернышев ◽  
Aleksandr Chernyshev
Keyword(s):  
Mechanical Properties ◽  
Energy Saving ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Convective Drying ◽  
Operating Parameters ◽  
Interior Decoration ◽  
Periodic Action ◽  
Black Alder

Alder gains increasing popularity just like alternative to expensive raw materials. Detai-led technique of the studies is proposed. The basic physical and mechanical properties of black alder wood are given, its properties as a material for furniture and interior decoration are examined. Beforehand dehydrating pro-cess of alder was mathematically modeled, values of transient humidity and other key operating parameters were obtained, and then practical industrial drying on parabolic modes was implemented. These modes include four stages with the initial warming and final WTP.

scholarly journals Physical and mechanical properties and modes of drying linden wood without artificial humidification

10.12737/8463 ◽  
2015 ◽  
Vol 4 (4) ◽  
pp. 140-146
Author(s):  
Чернышев ◽  
Aleksandr Chernyshev ◽  
Ефимова ◽  
Tatyana Efimova
Keyword(s):  
Mechanical Properties ◽  
Real Estate ◽  
Physical And Mechanical Properties ◽  
Convective Drying ◽  
Annual Rings ◽  
Wood Technology ◽  
The Real ◽  
The Real Estate ◽  
Late Wood

The article describes the features of the process and conditions of drying without artificial humidification of uncut lumber of linden in convective drying chambers without artificial humidification for the manu-facture of furniture parts and joinery products. Methodology of the work, the size of the samples and the rules for their selection are described. The data of physical and mechanical properties of linden wood are given, such as density, number of annual rings and the percentage of late wood. Studies have been con-ducted at the Department of Mechanical Wood Technology of VSAFT and one of the real estate compa-nies of Voronezh.

scholarly journals Analysis on Physical and Mechanical Properties of Red Mud Materials and Stockpile Stability after Dilatation

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Yanbo Feng ◽  
Chao Yang
Keyword(s):  
Mechanical Properties ◽  
Red Mud ◽  
Capital Investment ◽  
Physical And Mechanical Properties ◽  
Dam Break ◽  
Engineering Properties ◽  
Drying Process ◽  
Bayer Red Mud ◽  
The Stability ◽  
Wetting Process

Red mud is the tailings generated from the production process of aluminum industry and is mainly stacked in open-air at present, so how to ensure the stability of red mud stockpile is very important. Regarding mud stockpile of Guizhou Aluminum Factory as the research object, this paper studies the physical and mechanical properties of Bayer red mud from wetting process, Bayer red mud from drying process, and sintering red mud through laboratory test and finally analyzes its stability under extreme rainfall condition in this region by the Geo-Studio software. The research results show that the red muds in different processes have big difference in physical and mechanical properties. The strength of sintering red mud is about 4.2 times of that of Bayer red mud from wetting process on average, and the strength of Bayer red mud from drying process is about 1.5 times of that of Bayer red mud from wetting process on average. So, the sintering red mud can be used as the subdam of red mud stockpile, to reduce the risk of collapse and dam break. The stability coefficients of the mixed stocking method under three rainfall conditions are 2.611, 2.597, and 2.631, respectively, all of which are above 1.0. It reveals that the dilatation scheme of using the sintering red mud with good engineering properties to stockpile the Bayer red mud is feasible. It can not only guarantee the safety and stability of red mud stockpiles, but also reduce the risk of red mud dam break and the capital investment of red mud yard.

scholarly journals Measurement of pressure in hydraulics system of the ZTS 160 45 tractor

2012 ◽  
Vol 51 (No. 4) ◽  
pp. 140-144
Author(s):  
Z. Tkáč ◽  
J. Jablonický ◽  
R. Abrahám ◽  
J. Klusa
Keyword(s):  
Mechanical Properties ◽  
Dynamic Loading ◽  
Hydraulic System ◽  
Position Control ◽  
Physical And Mechanical Properties ◽  
Operating Parameters ◽  
Hydraulic Pump ◽  
Properties Of Soil ◽  
Loading Analysis

This contribution is oriented on the field of dynamic loading analysis of three-point hitch of tractor hydraulic pump. The hydraulic pump is placed in circuit of three-point hitch of the tractor ZTS 160 45. Obtained data from operation experiments will be applied for simulation of dynamic loading of the tested hydraulic pump. The measurements were realized during position control with ploughing sets: tractor ZTS 160 45 + plough 5-PN-30 and tractor ZTS 160 45 + plough 7-PHX-35. During the test physical and mechanical properties of soil and operating parameters of ploughing sets were investigated. Pressures of hydraulic system were in range from 3.2 to 7 MPa at aggregation with plough 5-PN-30 and hydraulic pump was loaded. Pressures of hydraulic system during ploughing with ploughing set tractor ZTS 160 45 + plough 7-PHX-35 were in range from 1.8 to 14 MPa and two times hydraulic pump was unloading in time 2 seconds.

scholarly journals MODELIZACIÓN DE LA RESISTENCIA A LA COMPRESIÓN DEL CONCRETO MEDIANTE REDES NEURONALES ARTIFICIALES

2017 ◽  
Vol 23 (2) ◽  
pp. 11
Author(s):  
Leoncio Luis Acuña Pinaud ◽  
Ana Victoria Torre Carrillo ◽  
Isabel Moromi Nakata ◽  
Pedro Celino Espinoza Haro ◽  
Francisco García Fernández
Keyword(s):  
Mechanical Properties ◽  
Neural Networks ◽  
Artificial Neural Networks ◽  
Compression Strength ◽  
Production Control ◽  
Load Capacity ◽  
High Capacity ◽  
Physical And Mechanical Properties ◽  
Structural Element ◽  
Artificial Neural

El uso del concreto como elemento estructural va aumentando año tras año. Sin embargo, este producto requiere de unos estrictos controles de calidad sobre sus propiedades mecánicas para el uso como elemento estructural. Este tipo de control implica la existencia de equipos de ensayo con una capacidad de carga de hasta 3.000KN. Sería de gran utilidad para el control de producción la utilización de un método alternativo de gran fiabilidad, que permitiera conocer las propiedades mecánicas a partir de otras propiedades físicas y mecánicas más fáciles de obtener. La alta capacidad de las redes neuronales artificiales (ANN) para modelar los más diversos procesos industriales, las convierte en una herramienta de gran utilidad en el ámbito de la industria del concreto. En este estudio se ha desarrollado una red neuronal para obtener la resistencia a compresión del concreto y se ha modelado dicha propiedad a partir de la composición del concreto y de sus parámetros de fabricación. La red neuronal diseñada, un perceptrón multicapa, ha permitido obtener la resistencia a compresión del concreto con un coeficiente de correlación de 0,97. Esto demuestra la capacidad de las redes neuronales artificiales para obtener la resistencia a compresión del concreto. Palabras clave.-Concreto, Resistencia a compresión, Redes neuronales artificiales. ABSTRACTThe use of concrete as a structural element increases year by year. However, this product needs very stringent control of its mechanical properties in order to be uses as structural element. This type of control requires to have very large testing equipment with a load capacity of up to 3.000KN. Production control would benefit greatly from the use of a highly reliable alternative method that would enable the mechanical properties to be found through more easily obtained physical and mechanical properties. The high capacity of artificial neural networks (ANN) to model a broad range of industrial processes makes them a very useful instrument in the concrete industry. In this study, one neural network was developed to obtain the properties of compressive strength. This property was then modeled though the composition of concrete and manufacturing parameters. The network designed, a multilayer perceptron, allowed the compression strength to be obtained with a regression coefficient of 0,97. This demonstrates the effectiveness of ANN for obtaining the mechanical properties of compression strength of concrete. Keywords.-Concrete, Compression strength, Artificial neural networks.

scholarly journals Pine wood modification via an antifungal oil – Heat treatment and its effect on annual wood rings

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 4731-4742
Author(s):  
Gonca Düzkale Sözbir ◽  
İbrahim Bektaş ◽  
Ayşenur Kiliç Ak ◽  
Saniye Erkan
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Antibacterial Properties ◽  
Physical And Mechanical Properties ◽  
Annual Number ◽  
Annual Rings ◽  
Combined Process ◽  
Impregnation Process ◽  
Thyme Oil ◽  
Wood Protection

Thyme oil, which is an anti-fungicide, was used to increase the physical and mechanical properties of wood as well as improve its strength, especially in outdoor conditions. For this purpose, Stone pine (Pinus pinea L.) wood samples classified according to the annual number of rings were exposed to either the impregnation process or the combined process, which was comprised of impregnation followed by heat treatment. As a result of the study, it was determined that the wood had different physical and mechanical properties based upon the number of annual rings. In addition, it was specified that the thyme oil used in the impregnation process improved the physical properties of the wood and also reduced the water absorption during the combined process. As a general conclusion, the impregnation process and the combined process increased the mechanical properties of the wood in parallel with an increase in the number of annual rings. The process of impregnation of wood materials with thyme oil is promising due to its anti-fungal and antibacterial properties, its ability to be used in small amounts in on-site impregnation, and it being an environmentally friendly product for the wood protection industry.

scholarly journals Insulation Panels Made from Thermally Modified Bark

2019 ◽  
Vol 15 (1) ◽  
pp. 23-34
Author(s):  
Zoltán Pásztory ◽  
Dimitrios Tsalagkas ◽  
Norbert Horváth ◽  
Zoltán Börcsök
Keyword(s):  
Mechanical Properties ◽  
Internal Bond ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Control Panel ◽  
Drying Process ◽  
Thickness Swelling ◽  
Heat Treated ◽  
Mechanical And Physical Properties ◽  
Panel Type

Abstract Thermally treated and ground poplar bark was used as the raw material for pressed bark insulation panels. Bark chips were treated for one, two, and three hours at 180 °C after a slow warming, drying process. The physical and mechanical properties of the pressed panels were investigated and compared to each other and to the control panel made of untreated bark chips. Thermal conductivity showed slight deviations and ranged from 0.064 – 0.067 W·m−1·K−1. The MOR and MOE showed a significant increase of 100%. The internal bond increased by 27% while the water absorption and thickness swelling decreased by 53.8% and 69.1% respectively. Panel density did not change significantly because the target density was the same for every panel type. The mechanical and physical properties of thermal insulation panels made of heat-treated chips increased significantly.

scholarly journals PENENTUAN MORFOLOGI PERMUKAAN, SIFAT FISIS DAN MEKANIK BERDASARKAN PRESENTASE KOMPOSISI BAHAN CAMPURAN BATAKO

2018 ◽  
Vol 3 (1) ◽  
pp. 59-68
Author(s):  
Selfiana Missa ◽  
Minsyahril Bukit ◽  
Andreas Christian Louk
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Data Analysis ◽  
Surface Morphology ◽  
Water Absorption ◽  
Compression Strength ◽  
Test Specimen ◽  
Physical And Mechanical Properties ◽  
Drying Process

ABSTRAK Telah dilakukan penelitian tentang kajian Morfologi Permukaan, Sifat Fisik dan Mekanik Batako dengan presentase komposisi bahan campuran batako. Penelitian ini dilakukan dengan menggunakan material tanah putih dan pasir. Selanjutnya bahan material dicampur dengan semen dengan variasi material 1:5, 1:6, 1:7, 1:8 dan 1:9. Kemudian dicetak dengan cara, pemadatan dan pengeringan. Setelah proses pengeringan dilakukan pengujian karakteristik sifat fisik dan mekanik benda uji berupa: uji kuat tekan (compression strength), densitas (density), porositas dan karakterisasi SEM. Berdasarkan analisis data, batako yang memiliki nilai densitas untuk variasi campuran tanah putih 665 mesh 2,05 gr/cm3, 2,04 gr/cm3dan 1,99 gr/cm3. Pada variasi campuran tanah putih 114 mesh 2,16 gr/cm3, 2,14 gr/cm3dan 2,05 gr/cm3. Untuk variasi campuran pasir 665 mesh 2,04 gr/cm3, 1,89 gr/cm3dan 2,11 gr/cm3. Untuk variasi campuran pasir 114 mesh 2,05 gr/cm3, 2,11 gr/cm3dan 2,02 gr/cm3.kuat tekan batako pada variasi campuran tanah putih 114 meshsebesar 20 kg/cm² memenuhi standar kuat tekan minimum mutu  IV. Sedangkan untuk porositas pada variasi campuran 1:6 dan 1:8 memenuhi standar penyerapan air pada mutu I dan mutu II. Kata kunci: Tanah putih, pasir, densitas, penyerapan air, kuat tekan dan SEM. ABSTRACT A research of determination of surface morphology, physical properties and mechanical properties of brick based on the composition of the mixture has been done. This research was done by using material of white soil and sand. Then Materials are mixted with cement with materials variation 1:5, 1:6, 1:7, 1:8 dan 1:9. Than each one was molded by means of compaction and drying.  After drying process the physical and mechanical properties of the test specimen is done in the form of compression test, density, porosity, and SEM characterization. Based on data analysis, brick with mixed variation of white soil of 665 mesh has the density value of 2,05 gr/cm3, 2,04 gr/cm3 dan 1,99 gr/cm3. For brick with mixed variation of white soilof 114 mesh has the density value are 2,16 gr/cm3, 2,14 gr/cm3dan 2,05 gr/cm3. For brick with mixed variation of sand of 665 mesh has the density value are 2,04 gr/cm3, 1,89 gr/cm3 dan 2,11 gr/cm3. For brick with mixed variation of sand of 114 mesh has the density value are 2,05 gr/cm3, 2,11 gr/cm3dan 2,02 gr/cm3. Compressive strength of brick with mixed variation of white soil of 114 mesh is 20 kg/cm² meet the minimum compressive strength standard of quality IV. While for the porosity of brick with mixed variation of 1:6 and 1:8 meet the standards of water absorption standard of quality I and quality II. Key Words : White  Soil,  sand,  density,  water  absorption,  Compressive  strength,  and  SEM

scholarly journals Vertical variability of selected macrostructural properties of juvenile wood organization in trunks of Scots pine (Pinus sylvestris L.) trees

2011 ◽  
Vol 76 (1) ◽  
pp. 27-33
Author(s):  
Arkadiusz Tomczak ◽  
Witold Pozdrowski ◽  
Tomasz Jelonek ◽  
Ireneusz Stypuła
Keyword(s):  
Mechanical Properties ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Annual Ring ◽  
Juvenile Wood ◽  
Physical And Mechanical Properties ◽  
Wood Structure ◽  
Annual Rings ◽  
Tree Trunk ◽  
Wood Tissue

The study makes an attempt to analyse the width of annual rings, the width of the latewood zone and the proportion of the latewood within juvenile wood along trunks of Scots pine (<em>Pinus sylvestris</em> L.) trees and to verify the hypothesis about the heterogeneous properties of juvenile wood in a single trunk. It was found that the above-mentioned macrostructural elements of wood structure showed a curvilinear correlation with the height of measurement points along the tree trunk. As the distance from the base of trunk increased, the width of the annual ring and the width of the latewood zone decreased, while the proportion of the latewood increased. These types of changes can affect positively physical and mechanical properties of wood tissue. It can be assumed that there is a mechanism which modifies properties of juvenile wood causing axial diversification of the analysed type of wood tissue. It is probable that axial heterogeneity results in advantageous changes in the mechanics of the tree trunk.

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