Structural and Technological Peculiarities of Asphalt Pavement Crack Sealing

Zhdanyuk, V.; Volovyk, Oleksandr; Bizhan, O. P.; Tsyrkunova, К.; Gnatenko, R. G.

doi:10.30977/bul.2219-5548.2019.84.0.82

Cited by 2 publications

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“…Generally, bitumen is modified using polymers such as rubber and resin. Modified bitumen is characterized by a number of positive characteristics (wider plastic range, low brittle temperature, and elasticity) [20]. However, the hot cast asphalt concrete requires fairly large amount of bitumen (12%) for its structuring, that is, the introduction of additives that would reinforce bitumen.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, doubts have arisen about the correctness of the primary technological method for producing bitumen by oxidizing petroleum feedstock. At the same time, the expediency of manufacturing and using distilled bitumen, obtained by vacuum distillation of heavy feedstock, seems to be quite rational [20]. However, during the manufacture of these mixtures, weather and climatic conditions, the characteristics of the feedstock (light and heavy oils), and the system for assessing the quality of bitumen were not always taken into account [25].…”

Section: Resultsmentioning

confidence: 99%

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Investigation of the properties of cast asphalt concrete mixture with the addition of fiber from the fly ash of thermal power plants

Bieliatynskyi

Yang

Pershakov

et al. 2022

Materials Science-Poland

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The introduction of new road-building materials with advanced physical and mechanical properties is the trend in contemporary civil engineering, which aims to increase the quality of road surfaces. The use of cast asphalt concrete in the upper layers of road surfaces as a replacement for layers made of traditional fine-grained asphalt concrete will not only increase the pace of construction and repair, but also the durability and quality of the road pavement. However, this method requires operational and economic optimization. Using fiber from the fly ash of thermal power plants is one of the solutions for the design of cast asphalt concrete compositions. The aim of the work is to design the optimal composition of hot cast asphalt concrete and cold cast emulsion–mineral mixtures with the use of fiber from the fly ash of thermal power plants for the construction of thin-layer coatings of highways of all categories and values; to study their properties; and to determine the feasibility of their use as reinforcing and stabilizing additives. The method of GOST 11506, namely, “Method for determining the softening temperature of the ring and ball”, with the apparatus “Lintel KiSh-20m-4” was used during the experiments. The use of standard laboratory tests made it possible to analyze the quality indicators of the materials under study and design the optimal compositions of hot cast asphalt concrete, taking into account the delamination of the mixture and the criterion of decomposition, in addition to exploring the properties of the obtained material.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Investigation of the properties of cast asphalt concrete mixture with the addition of fiber from the fly ash of thermal power plants

Bieliatynskyi

Yang

Pershakov

et al. 2022

Materials Science-Poland

View full text Add to dashboard Cite

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Environmental Impact Assessment for Construction and Reconstruction of Motor Roads

Morozov¹,

Morozova²,

Зюзюн³

2022

Dorogimosti

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Introduction. Environmental impact assessment is an important legal instrument that is aimed at preventing / minimizing environmental damage, ensuring environmental safety, rational use of natural resources, in the decision-making process on the implementation of economic activities. EIA is an important legal tool to prevent the consequences of activities of both enterprises and planned activities. This tool is as close as possible to European Union standards. EIA is carried out in compliance with the requirements of the legislation on environmental protection, taking into account the existing ecological state, environmental risks of the planned activity, prospects for socio-economic development, the power of the combined direct and indirect impact, including taking into account existing facilities. An EIA is a procedure preceding a planned economic activity (in this case, the construction or reconstruction of roads) and involves determining the nature, degree of danger of this activity on the environment and public health Problem Statement. Projects for the construction and reconstruction of roads are an integral part of Ukraine. Transport infrastructure has a significant negative impact on the environment, which is accompanied by the transformation of ecosystems, fragmentation of landscapes. In addition, motor vehicles are a powerful source of pollution of the atmosphere, territories and water areas adjacent to roads, and noise pollution. However, do not ignore the economic importance of road communication. That is why, the planning, construction and operation of roads must be carried out in accordance with environmental standards, and the norms themselves must ensure minimization of environmental impact. So far, there are no clear practical recommendatory criteria for determining the environmental damage of the proposed activity and the preparation of the EIA report. That is why it is important to constantly improve existing methods and definitions of environmental risks in order to form an assessment mechanism. This study is devoted to the application of one of such modern mechanisms of environmental impact assessment. The use of the method for assessing the level of environmental hazards for the implementation of the planned activities in the construction and reconstruction of critical infrastructure facilities was tested. Purpose. To test the method of assessing the level of environmental impact in the implementation of planned activities in the construction and reconstruction of the highway. Research methods. general scientific (generalization, comparison, analysis and synthesis, theoretical and methodological substantiation); mathematical statistics Results. To quantify the interaction between the types of activities (or groups of acting factors) during the project and the components (environmental characteristics) of the environment, a combined approach was taken to assess the impact using the improved Leopold matrix. The matrix is a table that contains horizontally a list of processes that affect the environment during the reconstruction (repair) of the road, vertically — criteria and indicators of impact, as environmental characteristics. The evaluator (analyst, project developer, expert) can modify the matrix in accordance with the specific tasks of the road construction and reconstruction (repair) project. Conclusion. The generalized function allows you to set an integral indicator of environmental impact assessment, which is a quantitative, unambiguous, universal indicator of the quality of the studied object and can be used as an EIA criterion for the construction and reconstruction (repair) of a road through its adequacy, efficiency and statistical sensitivity.

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Structural and Technological Peculiarities of Asphalt Pavement Crack Sealing

Cited by 2 publications

References 0 publications

Investigation of the properties of cast asphalt concrete mixture with the addition of fiber from the fly ash of thermal power plants

Investigation of the properties of cast asphalt concrete mixture with the addition of fiber from the fly ash of thermal power plants

Environmental Impact Assessment for Construction and Reconstruction of Motor Roads

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