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Study of the possibility of using sulfur asphalt and sulfur concrete in road construction

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Bieliatynskyi A. , Yang S. , Krayushkina K. , Shao M. , Ta M.

Materials Science Poland

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2023

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tom Vol. 41, No. 2

244--262

EN

The introduction of new effective road construction materials for pavements and foundations of highways is an urgent task, including the development and application of resource-saving technologies aimed at the use of low-demand, large-tonnage mineral materials, semi-finished products, industrial waste, and their by-products. Research on this topic has shown that sulfur and sulfur-containing waste, as well as modified technical sulfur when used as a binder, should be widely used in sulfur structural and road concrete in liquid, granular, or lumpy form. Ferrous cakes from the Pobug Nickel Plant or "tailings" of sulfur ore flotation can be used as fillers for sulfur binder. Having a high specific surface, they will have a positive effect on the structure formation of sulfur during the crystallization of the melt in the direction of strengthening the structure. Their high acid resistance should significantly increase the corrosion resistance of sulfur concretes. Granular slag from a metallurgical plant can be used as a fine aggregate. Overburden rocks in the form of gabbro-dolerites, dolerites, and basalts can be used as acid-resistant large aggregates. To reduce the fragility of the sulfur binder, plasticizing additives such as naphthalene, chlorinated paraffin, and bitumen can be introduced. The results obtained in this study confirm a decrease in the cost in the production of asphalt and cement concrete and the possibility of expanding the range of building materials with new road-building mixtures. Also, the test results showed that when temperature was decreased, the strength characteristics of sulfur concrete in the temperature range 0°C to −60°C increased by 7%. Low water absorption of sulfur concrete (0.1%–0.3%) versus cement concrete (2%–4%), which positively affected the strength and operational characteristics, was revealed.

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Improvement of the method for increasing roughness of asphalt and cement‑concrete surfaces of highways and airfields

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Yang S. , Krayushkina K. , Skrypchenko O. , Ji J. , Bieliatynskyi A.

Archives of Civil and Mechanical Engineering

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2023

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tom Vol. 23, no. 2

art. no. e121, 2023

EN

The safety of vehicles is ensured by a sufficient adhesion of the vehicle wheel to the asphalt concrete pavement, which is assessed by the adhesion coefficient. However, it is not possible to identify the reasons for the reduced adhesive properties of asphalt concrete pavement during operation by the adhesion coefficient. This can be explained by the fact that such properties are attributed to the roughness of the surface. The existing methods for increasing the adhesive properties and roughness of asphalt concrete pavement are based on the use of mixtures of stone materials with bitumen or the construction of a layer of stone mastic asphalt (SMA). Nevertheless, they do not always ensure the standard adhesion coefficient after the first year of maintenance. Thus, there is a need for the improvement of the method for increasing the roughness of the existing asphalt concrete pavement. During the research, compressive and tensile strength were evaluated. The British pendulum has been used to investigate the roughness of the cement concretes surface. As a result, it was established that the introduction of the basalt fiber into the cement mixture improves its physical and mechanical characteristics. Finally, the composition of the cement mixture for the rough thin-layer cement pavement was developed, taking into account the existing parameters of the asphalt pavements.

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Determination of the possibility of using phosphorus slag in the road industry

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Yang S. , Krayushkina K. , Akmaldinova O. , Ji J. , Bieliatynskyi A.

Materials Science Poland

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2023

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tom Vol. 41, No. 3

44--61

EN

The use of crushed, granulated slag is now a rational direction in the use of phosphorus waste in various areas of construction. The modern state of science and technology and the accumulated experience allow to use almost all types of metallurgical slag for the production of road-building materials. The use of slag from other industries will expand the raw material base and improve its geographical location, increase material production and quality, reduce the distance of material transportation and reduce the road construction cost. The use of slag is an environmental task that will have a social impact. The study theoretically proved and experimentally established the feasibility of laying asphalt concrete coatings with phosphorus slag on roadways. The technology of asphalt–concrete mixture preparations and compaction is developed, which ensures high operational properties of road surfaces. It was established that it is possible to produce homogeneous asphalt concrete with phosphorus slag, gravel, mineral powder, and sand, unlike traditional mineral materials of natural origin, such as limestone.