POROUS-MASTIC ASPHALT-CONCRETE MIXTURES AND THEIR UTILIZATION HISTORY

Vestnik MGSU 11/2017 Volume 12
  • Khudokonenko Anton Aleksandrovich - Architectural and Construction Academy of Don State Technical University (ASA DSTU) Master, Architectural and Construction Academy of Don State Technical University (ASA DSTU), 1 Gagarinа square, Rostov-on-Don, 344000, Russian Federation.
  • Chernov Sergey Anatol’evich - Architectural and Construction Academy of Don State Technical University (ASA DSTU) Candidate of Technical Sciences, Associate Professor, Architectural and Construction Academy of Don State Technical University (ASA DSTU), 1 Gagarinа square, Rostov-on-Don, 344000, Russian Federation.

Pages 1284-1288

Subject: a rapid increase in the traffic intensity and freight traffic on motor roads leads to premature destruction of road surfaces. At the same time, the actual service life of asphalt-concrete pavements rarely exceeds 4-5 years and in most cases is only 2-3 years. Most intensively defects and fractures appear on asphalt-concrete pavements in the early spring. Nowadays the overhaul intervals for the road surface coverings are significantly lower than those given by the regulatory requirements. One of the main reasons for this phenomenon is the use of obsolete technologies based on traditional materials whose properties are inadequate to resist stresses and deformations arising in the coating. This is especially evident in the climatic conditions of the south of the European part of Russia, where the upper layers of the roadway experience a much wider range of temperatures. Tighter requirements for the initial road-building materials and timely repair of the coatings allow us to increase the service life of motor roads. Research objectives: the aim of the study is to develop a new type of asphalt-concrete, such as porous-mastic one. Materials and methods: the work was carried out based on observations and published sources, a method of theoretical study and analysis. Results: the domestic and foreign experience of using the given asphalt concrete for the top layer of the coating was considered. The technology of preparation and laying of a porous-mastic asphalt-concrete mixture is presented and its advantages and disadvantages are shown. Conclusions: increasing the longevity of highways is an important and urgent task and it can be solved, in particular, due to the wide use of new technologies and non-traditional building materials that allow us to improve the quality of asphalt-concrete pavement and prolong its overhaul intervals.

DOI: 10.22227/1997-0935.2017.11.1284-1288

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ANALYSIS OF APPEARANCE QUALITY OF SILICATE COATINGS BY ATOMIC FORCE MICROSCOPY METHOD

Vestnik MGSU 5/2018 Volume 13
  • Loganina Valentina Ivanovna - Penza State University of Architecture and Construction Doctor of Technical Sciences, Professor, Head of the Department of Quality Management and Technology of Construction Production, Penza State University of Architecture and Construction, 28 G. Titova st., Penza, 440028, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Mazhitov Erkebulan Bisengalievich - Penza State University of Architecture and Construction Postgraduate Student, Department of Quality Management and Technology of Construction Production, Penza State University of Architecture and Construction, 28 G.Titova st., Penza, 440028, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 599-608

Subject: studying surface quality of silicate coatings based on sol-silicate paints. Research objectives: study regularities in formation of the quality of appearance of silicate coatings, depending on the type of film-forming agent. Materials and methods: polysilicate solutions were prepared by interaction of stabilized solutions of colloidal silica (sols) with liquid glasses. Scanning probe microscopy methods were used to assess the quality of the coating surface. The parameters of surface roughness were determined. Results: it is shown that it is possible to improve the appearance of silicate coatings by using in paints the polysilicate solutions as a film-forming agent. It has been shown that for coating samples based on sodium and potassium polysilicate solution, the surface patches with a less pronounced relief are observed compared to the nature of microprofiles of the coating samples based on potassium and sodium liquid glass. Coatings based on potassium and sodium polysilicate solution are characterized by more uniform distribution of the surface roughness. Conclusions: sol-silicate paints are characterized by higher quality of appearance of the coatings.

DOI: 10.22227/1997-0935.2018.5.599-608

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