scholarly journals IMPACT OF WATER AND TEMPERATURE CONDITIONS ON SUBGRADE IN ROAD-BUILDING CLIMATIC ZONE V IN KYRGYZSTAN

2020 ◽  
Vol 22 (1) ◽  
pp. 193-204
Author(s):  
E. M. Karimov
Keyword(s):  
Mechanical Properties ◽  
Atmospheric Precipitation ◽  
Physical And Mechanical Properties ◽  
Geological Structure ◽  
Climatic Zone ◽  
Kyrgyz Republic ◽  
Soil Humidity ◽  
The Road ◽  
Road Section ◽  
Geological Conditions

This paper presents research results of subgrade deformations leading to the loss of road stability on the Osh-Isfana road section in the South of Kyrgyzstan. The soil humidity of the sloping subgrade area occurs due to precipitation, so the paper considers the relationship between the subgrade settlement and atmospheric precipitation in the road-climatic zone V. The influence of the soil humidity on its physical and mechanical properties are determined as well as the critical values of humidity for each investigated area, when deformation can occur. The geological structure and parameters of physical and mechanical properties of soils are determined in the road section at issue. Subgrade settlement is evaluated and predicted in this work. The results can be used in road design and reconstruction with regard to the geological conditions of the Kyrgyz Republic.

scholarly journals Physical and mechanical properties of the rocks of the Starobinsky deposit forming the Third potash layer and its roof

2021 ◽  
Vol 65 (4) ◽  
pp. 484-494
Author(s):  
A. B. Petrovsky ◽  
V. Ya. Prushak ◽  
E. A. Lutovich
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Geological Structure ◽  
Mining Operations ◽  
The Third ◽  
Composition And Structure ◽  
Mining Conditions ◽  
The Stability ◽  
Roof Falling ◽  
Main Factor

The geological structure and the physical-mechanical properties of rocks composing and overlapping the Third potash formation in the areas of the mine field mine No. 4 JSC Belaruskali, which are scheduled to practice, are studied. The geological sections of the Third potash layer and its roof were built, the thickness of sylvinite and halite layers was measured, the roof falling of the rocks of the layer with a height of up to 20 m was assessed, and the type of immediate roof was determined by the composition and structure of its constituent rocks. It was established that the strength under uniaxial compression of both sylvinite and halite layers for the areas under consideration differs slightly. Therefore, to solve engineering problems of ensuring the stability of mine workings and to calculate fastening parameters, strength values averaged over the groups of layers can be used that correlate well with the percentage of weak and clay interlayers. The same applies to Poisson’s ratio, the values of which for various layers of formation are slightly different and can be taken by their averaging. It is shown that the main factor that negatively affects the strength of rocks occurring in the roof of the Third potash seam is the presence of weak and clay interlayers, which increases with depth. The introduction of the obtained results allows us to improve the calculation accuracy of securing mining parameters, to reduce the costs of their maintenance, and to improve the safety of mining operations in developing the Third potash formation in complex geological and mining conditions.

Physical and Mechanical Properties of the Road Surface when Replacing the Finely Crushed Mineral Part of Asphalt Concrete with Porcelain Stoneware Production Waste

2021 ◽  
Vol 1043 ◽  
pp. 101-107
Author(s):  
Natalia Yatsenko ◽  
Alexandr Evforitsky ◽  
Natalya Kotenko
Keyword(s):  
Mechanical Properties ◽  
Asphalt Concrete ◽  
Water Resistance ◽  
Physical And Mechanical Properties ◽  
High Strength ◽  
Type B ◽  
Grain Composition ◽  
The Road ◽  
Concrete Mixtures ◽  
Additional Hydrogen

The possibility of using waste porcelain stoneware - a high-strength non-porous, dense material as a finely crushed mineral part of asphalt concrete with 0-5 mm fraction has been established. The adhesive additive Bitaden content was revealed, that intensifies porcelain stoneware interaction with bitumen due to the additional hydrogen bonds formation, the particles’ contact plane activation with the action of van der Waals forces. The conditions for obtaining asphalt concrete mixtures of type B, grade 1 and G, grade 2 of the optimal grain composition with a reduced content of BND 60/90 bitumen have been developed. Physical and mechanical properties are characterized by an increase in the water resistance of asphalt concrete samples based on porcelain stoneware, compressive strength and shear resistance.

Estimation of geophysical and physical and mechanical properties on the example of quaternary soils of Sergiev Posad district

2018 ◽  
pp. 59-63
Author(s):  
V. V. Romanov ◽  
D. S. Daev ◽  
L. E. Chesalov ◽  
A. I. Poserenin
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Test Site ◽  
Geological Structure ◽  
Water Sources ◽  
Radioactive Substance ◽  
Clay Soils ◽  
Southern Slope ◽  
Near Surface ◽  
Near Surface Geophysics

The Sergiev Posad polygon of the MGRI-RSGPU is located on the watershed of the Pazha and Torgosha rivers located on the southern slope of the Klinsky-Dmitrovsky ridge; geologically, the upper part of its section is composed of clay soils of Quaternary and Cretaceous age. The paper gives an analysis of the values of seismic, electrical and physical and mechanical properties of soils, as well as resistivity of water sources and reservoirs. Main methods of near-surface geophysics allow obtaining this information. The performed methods made it possible to specify the geological structure of the first 15 meters of the section, to refine the hydrogeological conditions of the test site, to determine the properties of the grounds as bases for buildings and structures. Also, the effect of the radioactive substance oonthe state of the underlying soils has been established by means of a specially prepared soil radiometer plate .

scholarly journals Influence of the Soil Genesis on Physical and Mechanical Properties

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Marian Marschalko ◽  
Işık Yilmaz ◽  
Lucie Fojtová ◽  
Karel Kubečka ◽  
Tomáš Bouchal ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Sandy Loam ◽  
Physical And Mechanical Properties ◽  
Geological Structure ◽  
Point Of View ◽  
Clayey Sand ◽  
Soil Genesis ◽  
Foundation Soil ◽  
Genetic Types ◽  
Geotechnical Investigations

The paper deals with the influence of soil genesis on the physical-mechanical properties. The presented case study was conducted in the region of the Ostrava Basin where there is a varied genetic composition of the Quaternary geological structure on the underlying Neogeneous sediments which are sediments of analogous granulometry but different genesis. In this study, 7827 soil samples of an eolian, fluvial, glacial, and deluvial origin and their laboratory analyses results were used. The study identified different values in certain cases, mostly in coarser-grained foundation soils, such as sandy loam S4 (MS) and clayey sand F4 (CS). The soils of the fluvial origin manifest different values than other genetic types. Next, based on regression analyses, dependence was proved neither on the deposition depth (depth of samples) nor from the point of view of the individual foundation soil classes or the genetic types. The contribution of the paper is to point at the influence of genesis on the foundation soil properties so that engineering geologists and geotechnicians pay more attention to the genesis during engineering-geological and geotechnical investigations.

Application of New Soil Consolidator in Road-Construction Engineering

2012 ◽  
Vol 238 ◽  
pp. 466-469
Author(s):  
Hong Zhang ◽  
Dong Liang Xun ◽  
Zhao Yang ◽  
Fu Quan Ji
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical And Mechanical Properties ◽  
Road Construction ◽  
Point Of View ◽  
Curing Time ◽  
Construction Engineering ◽  
Geological Conditions ◽  
Silt Layer

This paper contrastively analyses the consolidation instances of silt with HEC and HAS soil consolidators, also emphatically discusses the influence regularities of the compressive strength of solidified soil with the following factors: the dose of consolidators and the curing time. Meanwhile, from the point of view of experiment, this paper studies the physical and mechanical properties of solidified soil. Case study shows that HEC and HAS soil consolidators behave as well as cement and lime in road-construction engineering, and even that filling subgrade independently. Also, this paper proposes the appropriate value 6% of HEC and HAS soil consolidators for solidifying silt layer, which can be used as reference for the similar geological conditions.

scholarly journals Transformation of oil dispersed systems during operation

2021 ◽  
Vol 11 (3) ◽  
pp. 481-490
Author(s):  
V. D. Cherepanov ◽  
S. G. D’yachkova ◽  
I. I. Kuzora ◽  
D. A. Dubrovskii ◽  
V. I. Lukina
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Hydrocarbon Composition ◽  
Softening Temperature ◽  
Atmospheric Conditions ◽  
Depth Of Penetration ◽  
Dispersed Systems ◽  
The Road ◽  
Group Hydrocarbon ◽  
The Stability

Abstract: Using the example of oil road bitumen grades BND 100/130, BND 130/200 and BND 70/100, this article studies the transformation of oil dispersed systems under various logistic schemes of operation. This research focuses on the influence of the conditions for storing road bitumens of different grades on their physical and mechanical properties and group hydrocarbon composition during transportation from the manufacturer to the consumer. The results show that a change in the physical and mechanical properties of road bitumens during high-temperature storage is related to the changes in the group hydrocarbon composition due to the hydrocarbons autooxidation and destabilization of the colloidal structure of dispersal systems. The conditions for storing bitumen with a minimum change in its quality indicators have been determined. It has been established that storage of bitumen under atmospheric conditions allows preserving its original properties without significant changes. There is evidence that nitrogen purging significantly reduces the effect of homolytic processes leading to the transformation of oil dispersed systems during further transportation from the manufacturer to the consumer. Experimental data confirm that of all basic physical and mechanical properties of bitumen, “the depth of penetration of needle” is the most sensitive index, while the “softening temperature” index, frequently used for quality control of bitumen, is inertial. Determining the change in penetration, depending on the duration of storing bitumen, has required formulating a special equation. It has been established that when storing road bitumen at a temperature of 180 ºС, for each hour the index of the penetration depth of the needle at 25 º decreases by 0.8 units. Organizational and technical measures have been determined to ensure the stability of the road bitumen quality during manufacture, storage and transportation to consumers.

scholarly journals Engineering and geological zoning of the Malmyzhsky deposit weathering crusts (Svoboda area)

2021 ◽  
Vol 1 ◽  
pp. 53-63
Author(s):  
Tatiana S. Bobina ◽  
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Weathering Crust ◽  
Alluvial Deposits ◽  
Porphyry Deposit ◽  
Geochemical Zoning ◽  
Copper Porphyry ◽  
Geological Conditions ◽  
Weathering Crusts ◽  
Mine Development

Introduction. Interest in the study of weathering crusts arose at a time when geological engineers faced the problem of developing open pits formed by eluvial soils. However, the exact and detailed division of the weathering crusts into engineering-geological zones, especially when studying mineral deposits, is not given due attention even today. Therefore, in the course of prospecting, it is important to correctly determine weathering crust type and profile, and establish the possibility of changing the engineering and geological conditions when opening the rock mass by mine workings for further slope stability prediction of the designed mining structures. Research aim is to determine vertical engineering-geological zoning of the Malmyzhsky deposit weathering crusts (Svoboda area) and identify patterns in alluvial deposits physical and mechanical properties change, which define the safety of mine development. Methodology. A significant number of Russian and foreign scientists have considered the formation of weathering crusts from different positions. They established the geochemical zoning and engineeringgeological zoning of the weathering crusts. Results. The article describes the Svoboda area at the Malmyzhsky gold-copper-porphyry deposit. Engineering and geological zoning of the weathering crust section was carried out according to a set of features, including structural and textural features, mineral composition, physical and mechanical properties of rocks. Within it, three zones are identified at the Malmyzhsky field, the Svoboda area: IV – dispersed, III – litomarge, and II – clastic. Physical and mechanical properties of rock building up the considered weathering crust have been analyzed proving that change in geological conditions within even one zone of the Malmyzhsky gold-copper-porphyry deposit (Svoboda area) entails a change in the choice of projected pit wall angles.

scholarly journals Technological solutions for mining of off-balance gypsum reserves in difficult geological conditions

2020 ◽  
Vol 168 ◽  
pp. 00064
Author(s):  
Serhii Skipochka ◽  
Viktor Serhiienko ◽  
Volodymyr Amelin ◽  
Oleh Sytnichenko ◽  
Thibault Faucher
Keyword(s):  
Mechanical Properties ◽  
Quantitative Assessment ◽  
Underground Mining ◽  
Physical And Mechanical Properties ◽  
Strength Characteristics ◽  
Maximum Width ◽  
Geological Conditions ◽  
Selective Mining

Mining technological solutions for underground mining of offbalance gypsum reserves in difficult mining and geological conditions were justified. An analysis of typical geological disturbances of gypsum seams is carried out using the Artemivsk deposit (Ukraine) as an example. Physical and mechanical properties of rocks in disturbed zones are determined. A quantitative assessment of strength characteristics of rocks during their moistening is carried out. The minimum permissible values of the width of the tape pillar and the power of the protective stack above the camera in the presence of a violation in the roof are calculated. The use of selective mining of the lower part of the seam by combines of the “Roadheader” type is recommended. The maximum width and height of the chamber are determined by the type of combine. The technology has been tested and realized at the gypsum mine of the Additional Liability Company “Siniat”.

Evaluation of High-Quality Dolomite Aggregate for Asphalt Wearing Course

2017 ◽  
Author(s):  
Viktoras Vorobjovas ◽  
Ovidijus Šernas ◽  
Daiva Žilionienė ◽  
Lina Šneideraitienė ◽  
Vilius Filotenkovas
Keyword(s):  
Mechanical Properties ◽  
Laboratory Testing ◽  
Asphalt Binder ◽  
Physical And Mechanical Properties ◽  
Magmatic Rock ◽  
Asphalt Mixtures ◽  
High Quality ◽  
The Road ◽  
The Third ◽  
Foreign Countries

In Lithuania dolomite is the third most excavated by the amount mineral resource, which is mostly used in subbase layer and hot asphalt mixtures for asphalt binder and base courses. Although, for asphalt wearing layer are often used granite aggregates, but this magmatic rock is imported from foreign countries. In one of the quarries of JSC “Dolomitas” higher quality dolomite is produced, which has similar mechanical properties to granite. To determine changes in mechanical properties of the different type of aggregates while using in the road, high-quality dolomite and two types of granite were chosen for laboratory testing. In this study, for evaluation of physical and mechanical properties of aggregates by laboratory tests for determining resistance to freezing-thawing, resistance to fragmentation, and polished stone value were carried out. Also, according to the results of laboratory testing, high-quality dolomite aggregate showed equal performance comparing to granite aggregates.

Sign in / Sign up

Export Citation Format

Share Document