The Influence of Physical Parameters on the Mechanical Characteristics of Some Volcanic Magmatic Rocks of the Andesite Type

Mining Revue ◽  
2021 ◽  
Vol 27 (2) ◽  
pp. 30-41
Author(s):  
Ciprian Danciu ◽  
Diana Marchiș ◽  
Simona Cucăilă
Keyword(s):  
Mechanical Characteristics ◽  
Strength Characteristics ◽  
Physical Parameters ◽  
Internal Factors ◽  
Hard Rocks ◽  
Magmatic Rocks ◽  
Mineral Components ◽  
Chemical Factors ◽  
Physical And Chemical ◽  
Physical And Mechanical Characteristics

Abstract The factors that influence the strength characteristics of rocks can be different in nature, being divided into external and internal factors. The mechanical properties of hard rocks are a result of geological, physical and chemical factors. In order to highlight the physical parameters that influence the strength characteristics of the rocks, in this paper there were analyzed six types of volcanic magmatic rocks such as andesites. In terms of stress behavior, rocks are directly influenced by their physical properties, such as volumetric density, porosity, compactness, moisture and the degree of alteration of mineral components. For this purpose, several sets of tests were performed to determine the physical and mechanical characteristics of the rocks, based on which it was possible to analyze how the physical parameters influence the strength characteristics.

scholarly journals Road plates with increased strength characteristics

2018 ◽  
Vol 212 ◽  
pp. 05003 ◽  
Author(s):  
Igor Ivanov ◽  
Andrey Komarov ◽  
Victoria Rosina
Keyword(s):  
Service Life ◽  
Mechanical Characteristics ◽  
Strength Characteristics ◽  
Long Period ◽  
Fiber Concrete ◽  
Temperature And Humidity ◽  
Increased Strength ◽  
Physical And Mechanical Characteristics

The issues of creating road plates with increased operational properties are considered in this paper. Monolithic concrete has a number of disadvantages, such as a long period of strength accumulation, temperature and humidity regime, and the inability to produce works throughout the year. The analyzed material for the production of road slabs (fiber concrete) makes it possible to produce plates with increased strength characteristics, to prolong service life, and to improve their physical and mechanical characteristics.

scholarly journals POTENTIAL OF MACAUBA EPICARP (Acrocomia aculeata (Jacq.) Lodd. ex Martius) FOR BRIQUETTES PRODUCTION

FLORESTA ◽  
2018 ◽  
Vol 48 (4) ◽  
pp. 563
Author(s):  
Vinícius Lima Teixeira ◽  
Angélica De Cássia Oliveira Carneiro ◽  
Anderson Barbosa Evaristo ◽  
Bruno De Freitas Homem de Faria ◽  
Danilo Barros Donato ◽  
...  
Keyword(s):  
Energy Density ◽  
Mechanical Characteristics ◽  
Chemical Properties ◽  
Energy Market ◽  
Production Chain ◽  
Solid Biofuels ◽  
Different Temperatures ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Physical And Mechanical Characteristics

Briquetting is a form to aggregate value in the biomass production chain, to re-use sustainably waste and to provide high-quality solid biofuels, as well as to enable the development of the energy market. The aim of this study was to evaluate the potential of the production of briquettes from epicarp waste of macauba fruit and verify the influence of different temperatures and compaction pressures on the chemical, physical, and mechanical characteristics of the briquettes. The epicarp was reduced to particles and, then classified, dried, and characterized for their physical and chemical properties. The briquettes were produced by using compression pressures of 62, 83, and 103 bar and temperatures of 90 and 120 °C. The effect of these factors upon the variables studied was verified through regression analysis. The increase of pressure and temperature contributed to greater mass loss of the briquettes. Apparent density and energy density increased due to temperature rise. High values of energy density were obtained, which demonstrates the potential of the macauba fruit epicarp to produce briquettes for generation of thermal energy

Distribution of certain soil inhabiting chytrid and chytridiaceous species related to some physical and chemical factors

1971 ◽  
Vol 49 (10) ◽  
pp. 1743-1755 ◽  
Author(s):  
Tom Booth
Keyword(s):  
Organic Matter ◽  
Standard Deviation ◽  
Environmental Factors ◽  
Environmental Parameters ◽  
Physical Parameters ◽  
Ecological Studies ◽  
Mean Values ◽  
Chemical Factors ◽  
Physical And Chemical ◽  
Linear Correlations

Most ecological studies of chytrids and chytridiaceous fungi in soils are primarily distributional, and autecological information for particular species is scant. In this study the distribution of 11 species, Schizochytrium aggregatum, Thraustochytrium roseum, Chytriomyces hyalinus, Rhizophlyctis harderi, Rhizophydium sp. (utriculare?), R. sphaerocarpum, R. carpophilum, R. sphaerotheca, Phlyctochytrium chaetiferum, P. palustre, and P. reinboldtae, is numerically expressed by an index (DII) derived from occurrence and frequency for 19 habitats. Mean values of various environmental parameters—pH, organic matter, bulk density, osmolarity, Ca2+, Mg2+, and Na+—are calculated for each habitat, and linear correlations of DII against means of the environmental factors of each habitat are calculated for each species. Also the range, mean, and standard deviation of chemical and physical parameters at sites where each species occurs are calculated. By these methods some autecological facts appear for each species. Basically the fungi are divisible into four groups: (1) obligately marine, S. aggregatum; (2) marine, T. roseum; (3) facultatively marine, C. hyalinus, R. harderi, R. sphaerocarpum, P. chaetiferum, R. carpophilum, R. sphaerotheca, Rhizophydium sp. (utriculare?); and (4) marine occasionals, P. palustre, P. reinboldtae. Problematic aspects of the study are discussed and another line of investigation is proposed.

scholarly journals Thermal transport investigation in AA7072 and AA7075 aluminum alloys nanomaterials based radiative nanofluids by considering the multiple physical flow conditions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Adnan ◽  
Sheikh Irfan Ullah Khan ◽  
Umar Khan ◽  
Naveed Ahmed ◽  
Syed Tauseef Mohyud-Din ◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Physical Interpretation ◽  
Thermal Transport ◽  
Mechanical Characteristics ◽  
Flow Regimes ◽  
Physical Parameters ◽  
Flow Conditions ◽  
Flow Parameters ◽  
Shooting Algorithm ◽  
Physical And Mechanical Characteristics

AbstractNow a day’s variety of nanomaterials is available, among these Aluminum Alloys AA7072 and AA705 are significant due to their thermal, physical and mechanical characteristics. These extensively used in manufacturing of spacecraft, aircraft parts and building testing. Keeping in view the significance of nanoliquids, the analysis of methanol suspended by AA7072 and AA7075 alloys under the multiple physical flow conditions is reported. The model is successfully treated by coupling of RK and shooting algorithm and examined the results for the flow regimes by altering the ingrained physical parameters. Then physical interpretation of the results discussed comprehensively. To validate the analysis, a comparison between the presented and existing is reported under certain assumptions on the flow parameters. It is found that the results are reliable inline with existing once.

scholarly journals Thermal Transport Investigation in AA7072 and AA7075 Aluminum Alloys Nanomaterials Based Radiative Nanofluids by Considering The Multiple Physical Flow Conditions

2020 ◽  
Author(s):  
Adnan Abbasi ◽  
Umar Khan ◽  
Naveed Ahmed ◽  
Syed Tauseef Mohyud-Din
Keyword(s):  
Aluminum Alloys ◽  
Physical Interpretation ◽  
Mechanical Characteristics ◽  
Scientific Literature ◽  
Flow Regimes ◽  
Recent Time ◽  
Physical Parameters ◽  
Flow Conditions ◽  
Shooting Algorithm ◽  
Physical And Mechanical Characteristics

Abstract In recent time, variety of nanomaterials have been reported in scientific literature, among these Aluminum Alloys AA7072 and AA705 are significant with thermal, physical and mechanical characteristics. These extensively used in manufacturing of spacecraft, aircraft parts and building testing. Keeping in view the significance of nanoliquids, the analysis of methanol suspended by AA7072 and AA7075 alloys under the multiple physical flow conditions is reported. The model is successfully treated by coupling of RK and shooting algorithm and examined the results for the flow regimes by altering ingrained physical parameters. Then physical interpretation of the results discussed comprehensively.

Quick Setting Composition Based on Steelmaking Metallurgical Slag

2017 ◽  
Author(s):  
Alsu Khamatova ◽  
Vadim Khozin ◽  
Oleg Khohryakov ◽  
Grigory Yakovlev
Keyword(s):  
Mechanical Characteristics ◽  
Setting Time ◽  
Chemical Study ◽  
Electric Steelmaking ◽  
Steelmaking Slag ◽  
Structure And Properties ◽  
Slag Dump ◽  
Physical And Chemical ◽  
Short Setting Time ◽  
Physical And Mechanical Characteristics

The article deals with the problem of utilizing steelmaking slag from the production of rapid hardening composition in Izhstal, CJSC (Izhevsk, Russia), determining its physical and mechanical characteristics, and applying its properties for renovation and reconstruction. The physical and mechanical characteristics of the developed mortar exceed the existing analogues in many parameters (setting speed, strength). Dry mortar has a short setting time (the end of setting occurs 3,5 minutes after mixing with water at W/S = 0,3), its strength being 66,8 MPa after 28 days of normal hardening. The results show this mortar can be used for emergency renovation work to stop leaks in concrete, stone and brick structures. The studies were conducted using the methods of physical and chemical study of the structure and properties of the produced composition. The developed composition helps reduce the environmental pressure in places of electric steelmaking slag dump.

scholarly journals Studying physical and mechanical characteristics of corn feed

2020 ◽  
Vol 17 ◽  
pp. 00209
Author(s):  
Vyacheslav Ulyanov ◽  
Vladimir Utolin ◽  
Nikolay Luzgin ◽  
Stanislav Krygin ◽  
Marina Parshina
Keyword(s):  
Mechanical Characteristics ◽  
Physical Parameters ◽  
Laboratory Equipment ◽  
Feed Material ◽  
Exchange Processes ◽  
Intensification Of Heat Exchange ◽  
Viscous Media ◽  
Solids Content ◽  
Working Bodies ◽  
Physical And Mechanical Characteristics

The use of condensed extract in the production of corn feed contributes to the improvement of their nutritional and biological value. The rheological properties of the feed material are of great importance in the mechanical interaction with the working bodies of the machines, in the movement of viscous media along technological conveyors, as well as in the intensification of heat exchange processes. The technique, laboratory equipment and the results of studies of physical and mechanical characteristics of corn feed are presented. The viscosity properties of the corn extract are investigated depending on the temperature. It is shown that when decreasing the temperature, the viscosity of the corn extract increases due to the aggregation of its components, which characterizes the non-Newtonian flow of the extract. The coefficient of external friction of the pulp and extract mixture in the technology of preparing corn feed allows calculating the geometry of the storage tanks and energy costs of the processes. The change in the coefficients of friction of corn feed when interacting with various surfaces, depending on the content of dry substances. The specific heat capacity, thermal conductivity and thermal diffusivity of the extract and corn feed were determined and investigated. It has been revealed that the dependences of the thermo-physical parameters of the extract and corn feed on the solids content are non-linear in nature, monotonously decreasing when increasing the concentration of solids.

scholarly journals The structure formation features of gypsum-lime composite binders for non-autoclaved aerated concrete

2021 ◽  
Vol 4 (1) ◽  
pp. 60-65
Author(s):  
B. B. Chekanskyi ◽  
◽  
I. V. Lutsyuk ◽  
V. R. Pastushok ◽  
◽  
...  
Keyword(s):  
Structure Formation ◽  
Calcium Sulfate ◽  
Mechanical Characteristics ◽  
Xrd Analysis ◽  
Formation Processes ◽  
Calcium Sulfate Dihydrate ◽  
Aerated Concrete ◽  
Physical And Chemical ◽  
The Relationship ◽  
Physical And Mechanical Characteristics

The crystalline phases of hydration products of the gypsum-lime binder were identified using XRD analysis. The physical and chemical regularities of the structure formation processes in the model system “gypsum – quicklime – metakaolin – amorphous silica – water – borax” were established. The influence of the quicklime type and gypsum binder brand on the morphology and the size of the calcium sulfate dihydrate crystals were investigated. The relationship between processesof the structure formation of composite gypsum-lime binders under normal hardeningconditions and the physical and mechanical characteristics of the stone was established.

BENCH DESIGN AND STUDY OF PHYSICAL AND MECHANICAL CHARACTERISTICS OF A TEAT CUP LINER WITH ANTIBACTERIAL FILLER

2020 ◽  
pp. 22-26
Author(s):  
YURY G. IVANOV ◽  
◽  
YELENA V. MASHOSHINA ◽  
LYUDMILA N. VERLIKOVA ◽  
DARIA G. GELETIY ◽  
...  
Keyword(s):  
Mechanical Characteristics ◽  
Physical And Mechanical Characteristics

Discharge-pulse Geotechnical Electro Discharge Technology of Bases Strengthening

2020 ◽  
Vol 787 (12) ◽  
pp. 63-65
Author(s):  
N.S. Sokolov
Keyword(s):  
Bearing Capacity ◽  
Mechanical Characteristics ◽  
Discharge Pulse ◽  
Zero Values ◽  
Traditional Technologies ◽  
Negative Friction ◽  
Geotechnical Problems ◽  
Physical And Mechanical Characteristics

The problem of increasing the bearing capacity of the base is an relevant problem in modern geotechnical construction. When significant loads are transmitted to the base, the use of traditional technologies is not always justified. Often there is an urgent need to use non-standard ways to strengthen the bases. In many cases, the geotechnical situation is aggravated by the presence of weak underlying layers with unstable physical and mechanical characteristics in engineering-geological sections. When strengthening such bases with the help of traditional piles, the latter can get negative friction, which significantly reduces their bearing capacity on the ground, sometimes reaching zero values. This may lead to additional precipitations of the objects being constructed and constructed in the zone of geotechnical influence. The use of ERT piles in most cases successfully solves many complex geotechnical problems.

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