scholarly journals EFFICIENCY OF REINFORCEMENT OF TECHNOLOGICAL SOIL BY MINERAL MODIFIERS

2019 ◽  
Vol 4 (7) ◽  
pp. 14-23
Author(s):  
Т. Дмитриева ◽  
T. Dmitrieva ◽  
Н. Куцына ◽  
N. Kucyna ◽  
А. Безродных ◽  
...  
Keyword(s):  
Raw Materials ◽  
Road Construction ◽  
Soil Reinforcement ◽  
Production Costs ◽  
Concrete Mixture ◽  
The Road ◽  
Physicomechanical Characteristics ◽  
Advantages And Disadvantages ◽  
Complex Binder ◽  
Technogenic Raw Materials

The paper discusses the main aspects of soil reinforcement in road construction by adding a binder component to them. The use of this technology allows to solve the problem of high-quality raw materials shortage while improving the physicomechanical characteristics or keeping them at the same level, as well as to increase labor productivity and reduce production costs. The technogenic raw materials for the production of soil concrete were studied, the main physicomechanical characteristics and requirements that must be taken into account when selecting the composition of the soil concrete mixture were analyzed. The paper compares the physicomechanical characteristics of the road composite, reveals the advantages and disadvantages of introducing binder components of various types: cement, cement with modifier and a complex binder. It has been established that the introduction of a complex binder or cement with modifier contributes to the improvement of the physicomechanical characteristics while reducing the consumption of cement in the composition of the soil-concrete mixture compared to traditional soil-concrete with cement.

scholarly journals INFLUENCE OF THE GENETIC FEATURES OF SOILS ON THE PROPERTIES OF SOIL-CONCRETES ON THEIR BASIS

2020 ◽  
pp. 69-75
Author(s):  
T. Dmitrieva ◽  
V. Strokova ◽  
A. Bezrodnykh
Keyword(s):  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Road Construction ◽  
Reinforced Soil ◽  
Soil Reinforcement ◽  
Production Costs ◽  
Forming Process ◽  
Main Hypothesis ◽  
Stabilized Soil ◽  
Clay Rocks

in order to form strong soil-concrete structures in parallel with the introduction of binder, an additive with a multicomponent composition that is activating the structure-forming process should be applied. Such additive is usually called stabilizer of soil, its introduction allows achieving a positive effect for soils with a high proportion of finely dispersed fraction in its composition. The article considers the main aspects of use in road construction of complex soil reinforcement by introducing a stabilizer and binding component. This technology will solve the problems of deficiency of high-quality traditional raw materials, lead to better physical and mechanical properties, increase labor productivity and reduce production costs. As a result of the carried out studies, principles for improving the quality characteristics of reinforced soil were developed, taking into account the mineral composition of clay raw materials. As the main hypothesis of the study an increase in the hydrophobicity of stabilized soil by blocking the hydrophilic centers of clay rocks should be marked. This circumstance helps to reduce the consumption of cement in the reinforced soil without reducing the operational and physical-mechanical characteristics. The dependence of the degree of effectiveness of the introduced stabilizing additive on the structural and chemical characteristics of clay rocks has been established, which decreases from montmorillonite and X-ray amorphous phases to kaolinite. Mixed layered formations, illite and chlorite act as intermediate minerals. Aluminosilicates act as the filler in this system that do not come into contact with the molecules of the stabilizer. To assess the degree of efficiency of interaction of the components of a soil-concrete mixture as an integral indicator it is necessary to use the cationic capacity of the soil.

The Analysis of the Static Mechanics for the Vehicle Frame

2015 ◽  
Vol 733 ◽  
pp. 505-508
Author(s):  
Wei Cheng Wu
Keyword(s):  
Raw Materials ◽  
Lightweight Design ◽  
Mechanical Analysis ◽  
Production Costs ◽  
Element Analysis ◽  
The Road ◽  
Automobile Assembly ◽  
Local Strength ◽  
Solid Works ◽  
Strength And Stiffness

As an important part of the automobile assembly, automobile frame bears the complex loads from the road and loaded, and be installed car assembly as the carrier, and thus the frame strength and stiffness in the car overall played a very important role in the design. This article use Solid Works to design a frame of a truck, and focus on using the finite element analysis software ANSYS study mechanical analysis and study of the vehicle frame. Here discussed the pure bending conditions and reverse the conditions of static strength, the static stiffness analysis. The analysis showed that the frame of the stress value is less than the ultimate strength of materials to meet the design requirements, but the intensity is too large, so the economy is relatively poor, while considering the local strength of the frame. According to this characteristic of the truck frame, this paper presents a program on the frame lightweight design, the results of optimization makes the weight of frame to reduce, saving raw materials, lowering production costs, improving fuel economy .

scholarly journals EFFICIENCY OF STABILIZERS OF VARIOUS COMPOSITION FOR STRENGTHENING THE SOIL WITH A MINERAL BINDER

2020 ◽  
Vol 3 (1) ◽  
pp. 30-38 ◽  
Author(s):  
T. Dmitrieva ◽  
I. Markova ◽  
V. Strokova ◽  
A. Bezrodnykh ◽  
N. Kucyna
Keyword(s):  
New Technologies ◽  
Raw Materials ◽  
Lower Layer ◽  
Reinforced Soil ◽  
Clay Soils ◽  
Chemical Additives ◽  
The Road ◽  
Physicomechanical Characteristics ◽  
Inorganic Mineral ◽  
Mineral Binder

the depletion of natural deposits of traditional inert mineral raw materials (sand, gravel) used to create effective layers of the foundations of roads leads to the development and application of new technologies and alternative materials. One way to solve this problem is to use local raw materials. For the construction of the lower layer of the road basement local soils are often used. However, their use is associated with the development of a set of measures to increase their efficiency, such as stabilization (by the use of chemical additives) and/or strengthening (by the introduction of various types of binders). In this regard, the paper analyzes the physicomechanical characteristics of reinforced clay soils obtained by introduction of various types of stabilizing additives in the presence of an inorganic mineral binder of hydration hardening type - cement - taking into account the recommendations for the used additives. The object of research was the most common representative of clay soils of the Belgorod region – heavy dusty clay loam. As a result of the studies, the authors established the reasonability of the use of the additives in the presence of cement, the most effective compositions of the reinforced soil were identified, contributing to the improvement of its controlled physical and mechanical characteristics. In addition, the need for additional studies to adjust the recommended composition of reinforced soil was established.

scholarly journals ANALYSIS OF DESIGN AND TECHNOLOGICAL PROCESSES OF HOT RECYCLING ASPHALT MIXTURE AT BATCH ASPHALT MIXING PLANTS

2020 ◽  
Author(s):  
Mindaugas Martišius ◽  
Henrikas Sivilevičius
Keyword(s):  
Raw Materials ◽  
Research Result ◽  
Asphalt Mixture ◽  
Road Construction ◽  
Advantages And Disadvantages ◽  
Baltic Countries ◽  
Road Design ◽  
On The Road ◽  
High Level ◽  
Innovative Techniques

European Union members seek to establish the principles of a circular economy, which is based on the efficient use of raw materials and resources. This requirement will have an impact on business and in particular on the road construction sector. Hence the need to improve the asphalt mixing plant (AMP) mixing technology utilizing as much as possible reclaimed asphalt pavement (RAP) to produce asphalt mixtures (AM) for road construction. The resources used to produce new AM in the world are endless and becoming more expensive in a time scale. The multi-cycle reuse of RAP producing AM is a priority, when thinking about of economical recycling materials usage and the saving of resources. The design and development of RAP hot recycling in-plant technologies has been in progress for approximately half a century. In high-level-economy countries, AM production currently processes on average approx. 80% of the amount of RAP using innovative techniques on AMPs. Design of various AMP, their assessment on the flexible application of innovative techniques depending on the RAP processing method, are described in this paper. In this paper different recycling technologies in AMP and their advantages and disadvantages are reviewed. The research result indicates technical possibilities hot recycling in-plant in Baltic countries. Local authorities, research institutes, road construction and road design companies could use these results in the future.

scholarly journals The device layers and transport facilities of hemihydrate phosphogypsum (waste byproduct of the production of nitrogen-phosphorus fertilizers)

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Andrey Kochetkov ◽  
Natal’ya Shchegoleva ◽  
Sergey Korotkovskiy ◽  
Victor Talalai ◽  
Yury Vasilyev ◽  
...  
Keyword(s):  
Raw Materials ◽  
Road Construction ◽  
Turnaround Time ◽  
Tracked Vehicles ◽  
The Road ◽  
The Cost ◽  
Cost Of Construction ◽  
Phosphogypsum Waste ◽  
Nitrogen Phosphorus

The implementation of the proposed innovative project on the use of phosphogypsum waste in road construction will: solve the problem of recycling and processing of phosphogypsum by using it as a local by-material for the construction of roadbed and foundations of roads; replace natural gypsum with cheaper raw materials for cement, construction and road industry; reduce the cost of construction of roads and extend the turnaround time by improving the quality of their properties. Road with the use of phosphogypsum is cheaper by 30 % than roads with traditional technologies. In the swampy area due to the characteristics of the material, combining solidity and lightness, phosphogypsum is not interchangeable at all. It allows you to make reliable and durable roads. The design is obtained up to five times stronger than the required standards. At the same time, at the first stage of construction of the road, it is possible to make an intermediate type, making the bases of phosphogypsum, and later laying the remaining structural layers of crushed stone and asphalt. In this case, the coating of technical gypsum is not destroyed, even with the passage of heavy tracked vehicles and at low temperatures.

scholarly journals Choice of road building technology - statistic analyses with the use of the Hellwig method

2018 ◽  
Vol 45 ◽  
pp. 00081 ◽  
Author(s):  
Izabela Skrzypczak ◽  
Wojciech Radwański ◽  
Tomasz Pytlowany
Keyword(s):  
Building Materials ◽  
Asphalt Pavement ◽  
Road Construction ◽  
Concrete Pavements ◽  
Pavement Maintenance ◽  
Road Building ◽  
The Road ◽  
Building Technology ◽  
Advantages And Disadvantages ◽  
The Moment

There are two technologies for road construction, e.g. an asphalt one and a concrete one, that exist in the market of road infrastructure at the moment and they both have their advantages and disadvantages [prof Jan Deja of Krakow Mining Academy, Cathedral of Building Materials Technology].The advantage of concrete pavement consists of the fact that it doesn’t require bigger financial expenditures within 10 – 20 years of exploitation (provided that necessary pavement maintenance treatments are carried out). In the case of asphalt pavement it is necessary to mill the wear off layer of the road already after 6-7 years. It leads to the question: which of these technologies should be chosen, which is better? The work hereby carries on analyses concerning a comparison of the technologies for road constructions; the asphalt one and the concrete one. Based on the analyses carried out with the use of the Hellwig method it was found that the achieved values of synthetic meters for asphalt and concrete pavements are close to each other, which may indicate that both technologies are comparable within the sectors taken for analyses in relation to accepted technological-technical and usability features.

scholarly journals THE IMPORTANCE OF THE USE OF WARM MIX ASPHALT FOR CONSTRUCTION ROADS IN CONDITIONS OF THE SYRIAN ARAB REPUBLIC

2020 ◽  
pp. 26-33
Author(s):  
A. Alshahwan ◽  
Yu. Kalgin
Keyword(s):  
Road Network ◽  
Road Construction ◽  
Production Costs ◽  
Reconstruction Process ◽  
The Road ◽  
Short Period ◽  
Syrian Arab Republic ◽  
Asphalt Mix ◽  
Long Time ◽  
Production Capacities

As a result of prolonged hostilities in the Syrian Arab Republic, maintenance and repair of roads are not carried out for a long time, which led to the decline of the road network. Roads of the Syrian Arab Republic require significant rehabilitation; repairs must be carried out within a short period at the lowest cost, while achieving optimal technical characteristics. Weak economic potential of the country, low fuel reserves of various types, in addition to the huge destruction of the road network - all these difficulties facing the reconstruction process. This article is devoted to the study of the characteristics of the technologies of asphalt mixes used in road construction, and the determination of the most suitable technology for current conditions. As a result of research, it is emphasized that warm asphalt mix is the best choice compared to other types of technologies: it reduces energy consumption, reduces production costs, helps to extend the construction season, expand production capacities, save the environment, etc.

scholarly journals PROSPECTS FOR APPLICATION OF COMPLEX-MODIFIED SAND ASPHALT CONCRETE IN ROAD CONSTRUCTION

2017 ◽  
Vol 16 (4) ◽  
pp. 315-323
Author(s):  
D. Yu. Alexandrov
Keyword(s):  
Asphalt Concrete ◽  
Quartz Sand ◽  
Chemical Activation ◽  
Physical And Mechanical Properties ◽  
Road Construction ◽  
Industrial Wastes ◽  
Special Equipment ◽  
Road Asphalt ◽  
The Road ◽  
Advantages And Disadvantages

The paper considers a possibility to use sand asphalt concrete as a material for protection of asphalt concrete and cement concrete road pavements against affection of external destructive factors. Advantages and disadvantages of sand asphalt concrete road pavements have been determined in the paper. The paper provides recommendations on improvement of sand asphalt concrete properties and contains an analysis of possible variants for usage of complex-modified sand asphalt concrete in the road construction. It has been noted that according to its potentially possible physical and mechanical properties activated quartz sand being micro-reinforced by dispersive industrial wastes is considered as an efficient component for creation of constructive layers in road asphalt concrete pavements. The paper reveals only specific aspects of the efficient application of quartz sand in road asphalt concrete. The subject of the paper loоks rather interesting for regions where there are no rock deposits for obtaining broken-stone ballast but there is rather significant spreading of local quarts sand. Its successful application is connected with the necessity to develop special equipment for physical and chemical activation of sand grain surface that permits strongly to increase an adhesive strength in the area of phase separation within the “bitumen–SiO2” system. The considered problem is a topical one and its solution will make it possible to local sand in a maximum way and partially to exclude application of broken stone in road construction.

scholarly journals Decision Supporter for Determining Priority in Supply of Shoe Raw Materials Using the Simple Additive Weighting Method

2019 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Ardila Sani ◽  
Tb Ai Munandar ◽  
Akip Suhendar
Keyword(s):  
Decision Support ◽  
Decision Support System ◽  
Production Process ◽  
Support System ◽  
Raw Materials ◽  
Production Costs ◽  
Weighted Sum ◽  
Advantages And Disadvantages ◽  
Weighted Sum Method ◽  
Simple Additive Weighting

More and more types of raw materials will be used to expedite the shoe production process, making it difficult for companies to determine the priority of raw materials. So that there are often advantages and disadvantages of raw materials during the production process, which causes changes in the budget of production costs that are not in accordance with the initial plan, resulting in decreased corporate profits. Decision Support System (SPK) is a system that can help someone in making decisions that are accurate and right on target. Many problems can be solved by using SPK, one of which is determining priorities in the supply of raw materials. There are several methods that can be used in building a DSS, including simple addtive weighting (SAW). The Simple Additive Weighting (SAW) method is often also known as the weighted sum method, by finding the weighted sum of performance ratings for each alternative of all attributes. This study discusses the making of a decision support system as a tool for determining priorities in the supply of raw materials using the simple additive weighting (SAW) method. This application was developed with the Power Builder 8.0 programming language and Sybase SQL Anyware 5.0 as its database. The results of this study are able to help system users determine the priority of the supply of raw materials in order to facilitate the production process.

scholarly journals Providing interlayer adhesion of dissimilar layers of top road surfaces

2021 ◽  
Vol 274 ◽  
pp. 02003
Author(s):  
Talgat Gabdullin ◽  
Marat Makhmutov
Keyword(s):  
Layer Thickness ◽  
Asphalt Concrete ◽  
Road Construction ◽  
Concrete Mixture ◽  
Cement Concrete ◽  
The Road ◽  
Road Pavement ◽  
Concrete Base ◽  
Pavement Layers ◽  
Asphalt Concrete Pavement

The article reviews the option of how to make the top pavement of asphalt-concrete mixture adhere reliably to the base, which is the underlying cement-concrete coating. The bitumen-latex emulsion is suggested as a binder for the two pavement layers. The research aimed to determine the optimal layer thickness of the bituminous-latex emulsion to be applied and achieve the maximum interlayer adhesion between the top asphalt-concrete pavement and the cement-concrete base. After full-scale experiments, the required layer thickness of the bitumen-latex emulsion was 2 mm. With this layer thickness of the binder, road pavement layers do not delaminate and shear when stressed by the intensive flows of vehicles moving on the roads. The results obtained are important for the road construction industry for suggesting the formulation of bitumen-latex emulsion and finding the most effective layer thickness to be applied. The suggested formulation of a bitumen-latex emulsion is frost-resistant. The article describes the experimental steps for determining the optimal application thickness at a fair length. The maintenance-free life of roads with an asphalt-concrete mixture on a cement-concrete base interlayered with a bitumen-latex emulsion as a binder is assumed to get much longer.

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