CREDO RADON UA – INFORMATION MODEL FOR CALCULATION OF ROAD CONSTRACTION

2019 ◽  
pp. 34-42
Author(s):  
Volodymyr Karedin ◽  
Nadiya Pavlenko
Keyword(s):  
Design Process ◽  
Static Loading ◽  
Computer Aided Design ◽  
Experimental Studies ◽  
Construction Materials ◽  
Residual Deformation ◽  
Road Construction ◽  
Information Support ◽  
Existing Structures ◽  
Road Pavement

CREDO RADON UA software provides an automated calculation of the strength of the pavement structures of non-rigid and rigid types, as well as the calculation of the strengthening of existing structures. In the article, one can see the main features and functionality of the CREDO RADON UA software, the main points in the calculations according to the new regulations. Information support of the design process includes necessary databases, informational and helping materials that make up the full support of the pavement design process. The concept of CREDO RADON UA 1.0 software is made on the use of elasticity theory methods in calculations of initial information models of pavements. Performing optimization calculations, the roadwear in CREDO RADON UA is designed in such a way that no unacceptable residual deformation occurs under the influence of short-term dynamic or static loading in the working layer of the earth bed and in the structural layers during the lifetime of the structure. The calculation algorithms were made in accordance with the current regulatory documents of Ukraine. CREDO RADON UA software allows user to create information bases on road construction materials and vehicles as part of the traffic flow for calculations. The presented system of automated modeling makes it easier for the customer to control the quality of design solutions, to reasonably assign designs to layers of reinforcement, to quickly make comparisons of calculations of different designs for the optimal use of allocated funds. Prospects for further improvement of the program should be the results of theoretical and experimental studies on filling the databases, which are used as information support for automated design of road structures. Keywords: CREDO RADON UA, road, computer-aided design, repair project, road pavement, strengthening, construction, rigid pavement, elasticity module, a transport stream, calculation method, information support, dynamic or static loading.

CREDO ON SERVICE BY ROADWAYERS

2018 ◽  
pp. 37-47
Author(s):  
V. S. Karedin ◽  
N. V. Pavlenko
Keyword(s):  
Traffic Management ◽  
Computer Aided Design ◽  
Construction Projects ◽  
Road Construction ◽  
Transport Infrastructure ◽  
Software Products ◽  
Road Pavement ◽  
Regulatory Standards ◽  
Technological Chain ◽  
Functional Features

The multifunctional CREDO complex of is aimed to provide automated data processing in geodetic works, engineering surveys, data preparation for GIS, creation of digital terrain models, automated design of roads. In the article, you can find main features and functionality of common CREDO software products for the construction projects design. CREDO software for road construction projects allow implementing an effective technological chain of work: from the preparation of initial data for design to the transfer of design solutions to the construction site, including 3D-systems for automatic control of road construction machines. CREDO ROADS software can be supplemented with modules – RAMPS, TRAFFIC ORGANIZATION, SETTLEMENT, ROADS ASSESSMENT of. Solution of additional and special tasks is provided by applications: CREDO RADON, CREDO TRAFFIC, CREDO SIGN, GRIS, MORFOSTVOR and SLOPE. The article highlights the possibility of high quality, fast and accurate calculation of the volume of work to perform the project of road repair and reconstruction. This feature of the software is the most relevant for Ukraine in terms of the huge scale of the planned works on the restoration of the transport network of the country. In the article, the authors consider the main directions of each of the systems, their functional features and advantages for the design of transport infrastructure. For the convenience of working with the software package and design in a single regulatory space, CREDO systems are fully adapted to the regulatory standards of Ukraine Keywords: road, computer-aided design, tracing, longitudinal profile, traffic management, engineering surveys, repair project, ramps, digital model of the project, road pavement, 3D-systems.

INVESTIGATION OF THE RECYCLING METHODS OF THE ROAD CONSTRUCTION MATERIALS DURING THE REPAIR OF THE ROAD PAVEMENTS OF THE CAPITAL TYPE

2021 ◽  
Vol 2021 (24) ◽  
pp. 60-71
Author(s):  
Sergyi Golovko ◽  
Keyword(s):  
Construction Materials ◽  
Road Construction ◽  
Environmental Safety ◽  
Major Type ◽  
The Road ◽  
Road Pavement ◽  
Bituminous Materials ◽  
On The Road ◽  
Cold Recycling ◽  
Methods Analytical

Introduction. The paper considers the issues of increasing of road construction materials reuse when repairing of major type pavements, by simultaneous use of hot and cold recycling technologies (in the plant and on the road). Problem statement. At many road construction objects, especially when repairing roads of state importance, designing engineers meet the problem of the need in a significant amount of bituminous materials. There is a question of how to provide such a quantity of these materials and do it economically efficient. Research has shown that it is necessary to use hot and cold recycling technologies economically efficiently. Purpose. Searching for the possibility of arranging of foundation layers, by simultaneously applying of hot and cold recycling technologies. Research methods. Analytical and experimental with the use of computer simulation of a multilayer structure. Results. It has been determined that the upper layers of the foundation can be strengthened by asphalt concrete manufacturing by hot recycling technology (in the plant), and the lower layers by cold recycling mixtures using different types of binders and manufacturing methods (in the plant and on the road). Conclusions. The conducted research allowed to confirm the thesis about the effectiveness of the solution to restore the strength of the capital-type road pavement. The obtained solution will reduce the cost of pavement repair and solve the issue of bituminous materials utilization, which will positively affect the environmental safety of the region.

scholarly journals Reducing the accumulation of residual deformations in the structural layers of pavements and in the subgrade soil through the use of stabilizing and adhesive additives

2018 ◽  
Vol 5 (4) ◽  
Author(s):  
Georgij Mygal ◽  
Nikita Mironov ◽  
Vakhtang Matua
Keyword(s):  
Asphalt Concrete ◽  
Soil Stabilization ◽  
Construction Materials ◽  
Road Construction ◽  
Turnaround Time ◽  
Road Pavement ◽  
Subgrade Soil ◽  
Stabilized Soil ◽  
Residual Deformations ◽  
The Impact

Road constructions are most relevant. This article provides data on the improvement of the properties of road construction materials, including those added to the soil: stabilized soil and adhesive asphalt concrete. Because of the impact of the above-mentioned additives, the accumulation of residual deformations in the structural layers of road products are reduced. The analysis of the market of the Russian Federation, which resulted in the identification of the following most preferred options for additives for research: ANT for soil stabilization and Amdor-10 and DAD-1 mark C for asphalt concrete. For asphalt concrete, several additivies were considered, since this is the most important structural layer in road pavement, perceiving the load from passing vehicles. This article provides comparative tables and graphs, which provide data on changes in the physic-mechanical properties of materials (soils and asphalt concrete) as a result of the application of the above additives. All tests were performed in accordance with the current regulatory documentation, and all the necessary requirements for the test materials were met. Were also obtained materials for testing. With the help of this device the possibility of resisting the accumulation of residual deformations is estimated. There is an imitation of situations in which materials are in real road. As a result, data were obtained that the use of stabilizing additives for soil and adhesive fabric reduces the accumulation of residual deformations and, as a result, increases the turnaround time between repairs.

scholarly journals Features of using modified bitumen in road construction

Technobius ◽  
2021 ◽  
Vol 1 (4) ◽  
pp. 0007
Author(s):  
Aigerim Syzdykova ◽  
Aigul Zhakyp ◽  
Assel Tulebekova
Keyword(s):  
Construction Materials ◽  
Road Construction ◽  
Crumb Rubber ◽  
International Standards ◽  
Negative Consequences ◽  
Resource Saving ◽  
Modified Bitumen ◽  
The Road ◽  
Advantages And Disadvantages ◽  
Road Pavement

The road industry is one of the important components of the economy. Quantitative and qualitative changes in the road industry require new technological approaches to road construction. The higher the transport-operational level of roads, the less the negative consequences of motorization are manifested. The condition of highways and their compliance with the international standards largely depends on the observance of construction technologies of road pavement, and the road pavement itself should have layers of strong, frost and temperature resistant monolithic materials which provide a long period of exploitation. The paper presents the peculiarities of the application of different types of modifiers for bitumen. It discusses their advantages and disadvantages, the importance of selecting the composition of the bituminous and mineral mixture. The use of crumb rubber as a modifier allows to realize the concept of a closed resource-saving technology of construction of roads. This approach will allow, on a technologically sound basis and taking into account the real needs of road construction materials, to restore the road network.

Exploring the Engineering Design Process Through Computer-Aided Design and 3-D Printing

Science Scope ◽  
2017 ◽  
Vol 041 (01) ◽  
Author(s):  
Nicholas Garafolo ◽  
Nidaa Makki ◽  
Katrina Halasa ◽  
Wondimu Ahmed ◽  
Kristin Koskey ◽  
...  
Keyword(s):  
Engineering Design ◽  
Design Process ◽  
Computer Aided Design ◽  
Engineering Design Process ◽  
Computer Aided ◽  
Aided Design

Designing an Indigenous Voice that empowers: How constitutional recognition could strengthen First Nations sovereignty

2021 ◽  
pp. 1037969X2110096
Author(s):  
Jason O’Neil
Keyword(s):  
First Nations ◽  
Design Process ◽  
Interim Report ◽  
Role Of Government ◽  
Existing Structures ◽  
First Peoples ◽  
Indigenous Voice

This article considers how a First Nations Voice to Parliament, if carefully designed, could strengthen the land-based sovereignty and autonomy of First Peoples in Australia. It critiques the proposals presented in the Indigenous Voice Co-design Process' Interim Report released January 2021 for its emphasis on the role of government and existing structures. It responds to Indigenous critiques of the Uluru Statement from the Heart, while arguing for a constitutionally enshrined Voice to Parliament that respects and defers to First Nations' Country-based authority.

scholarly journals Research on the Properties of Mineral–Cement Emulsion Mixtures Using Recycled Road Pavement Materials

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 563
Author(s):  
Łukasz Skotnicki ◽  
Jarosław Kuźniewski ◽  
Antoni Szydło
Keyword(s):  
Road Construction ◽  
Base Layer ◽  
Asphalt Emulsion ◽  
Reclaimed Asphalt ◽  
Pavement Materials ◽  
Road Pavement ◽  
Road Surfaces ◽  
Cement Binder ◽  
Pavement Structures ◽  
By Products

The reduction in natural resources and aspects of environmental protection necessitate alternative uses of waste materials in the area of construction. Recycling is also observed in road construction where mineral–cement emulsion (MCE) mixtures are applied. The MCE mix is a conglomerate that can be used to make the base layer in road pavement structures. MCE mixes contain reclaimed asphalt from old, degraded road surfaces, aggregate improving the gradation, asphalt emulsion, and cement as a binder. The use of these ingredients, especially cement, can cause shrinkage and cracks in road layers. The article presents selected issues related to the problem of cracking in MCE mixtures. The authors of the study focused on reducing the cracking phenomenon in MCE mixes by using an innovative cement binder with recycled materials. The innovative cement binder based on dusty by-products from cement plants also contributes to the optimization of the recycling process in road surfaces. The research was carried out in the field of stiffness, fatigue life, crack resistance, and shrinkage analysis of mineral–cement emulsion mixes. It was found that it was possible to reduce the stiffness and the cracking in MCE mixes. The use of innovative binders will positively affect the durability of road pavements.

scholarly journals The zooarchaeological identification of a ‘Morisco’ community after the Christian conquest of Granada (Spain, early 16th century): sociocultural continuities and economic innovations

2021 ◽  
Vol 13 (3) ◽  
Author(s):  
Marcos García-García ◽  
Guillermo García-Contreras ◽  
Michelle M. Alexander ◽  
Rowena Y. Banerjea ◽  
Aleks Pluskowski
Keyword(s):  
Middle Ages ◽  
Distribution Systems ◽  
Construction Materials ◽  
Meat Products ◽  
Early Modern Period ◽  
16Th Century ◽  
Existing Structures ◽  
Production And Distribution ◽  
Surrounding Landscape ◽  
The Middle Ages

AbstractThis article presents the results of the zooarchaeological analysis of an assemblage dating to the second quarter of the 16th century that was discovered on the current university campus of Cartuja, on the outskirts of Granada (Andalusia, Spain). During the Middle Ages, this area was largely used for agricultural purposes, including as estates owned by high officials of the Nasrid dynasty, the last Islamicate polity in the Iberian Peninsula. The Castilian conquest of Granada in 1492 brought significant changes to the area, with the construction of a Carthusian monastery and the transformation of the surrounding landscape, including changes in property structures, different agrarian regimes and the demolition of pre-existing structures. Among these transformations was the filling up of a well with construction materials, and its further use as a rubbish dump. This fill yielded an interesting and unique zooarchaeological assemblage, the study of which is presented here. The results advance our understanding of changing patterns in animal consumption during the formative transition from the Middle Ages to the Early Modern period at the heart of the former Nasrid Kingdom of Granada, and indicate the continuity of some Andalusi consumption patterns along with specialised production and distribution systems of meat products that have no archaeological precedent in the region, suggesting that the bones were dumped by a possible ‘Morisco’ community (autochthonous Muslims forced to convert to Christianity in 1502).

scholarly journals An investigation into the cause of road failure along Sagamu-Papalanto highway southwestern Nigeria

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Ubido Oyem Emmanuel ◽  
Igwe Ogbonnaya ◽  
Ukah Bernadette Uche
Keyword(s):  
Construction Materials ◽  
Road Construction ◽  
Linear Shrinkage ◽  
Liquid Limit ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Southwestern Nigeria ◽  
Low Resistivity ◽  
The Road ◽  
Cause Of Failure

AbstractInvestigation into the cause of road failure has been carried out along a 60 km long Sagamu –Papalanto highway southwestern Nigeria. Geochemical, mineralogical, geotechnical and geophysical analyses were conducted to evaluate the cause of failure along the study area. The results of the laboratory tests showed that the percentage amount of fines ranges from 12 to 61.3%, natural moisture content from 6.8 to 19.7%, liquid limit in the range of 25.1–52.2%, linear shrinkage between 3.96 to 12.71%, plastic limit ranges from 18.2–35%, plasticity index ranges from 5.2 to 24.6%, free swell in the range from 5.17–43.9%, maximum dry density ranges from 1.51–1.74 g /cm3, specific gravity ranges from 2.52–2.64 and CBR between 3 and 12%. The Cone Penetrometer Test (CPT) shows a resistance value of 20–138 kgf/cm2. The major clay mineral that is predominant in the studied soil is kaolinite. The major oxides present are SiO2, Al2O3, Fe2O3, K2O, Na2O, MgO and CaO. The result of the 2D Electrical Resistivity Imaging revealed a low resistivity values for profile 2 and 3 ranging from 100 Ωm – 300 Ωm, between a distance of 20 m – 240 m along the profile to a depth of 7.60 m and a low resistivity value ranging from 50 Ωm – 111Ωm, between a distance of 80 m − 120 m along the profile to a depth of 15 m. It was concluded that the low CBR, low MDD and the class of subsoils namely A-26, A-7, A-2-7 (clayey soils) which were identified are responsible for the cause of failure experienced in the study area. These makes the soils unsuitable as road construction materials and hence, there is need for stabilization during the reconstruction and rehabilitation of the road.

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