2025, Vol. 12, No. 4. - go to content...

Permanent address of this page - https://t-s.today/en/21sats425.html

Метаданные этой статьи так же доступны на русском языке

DOI: 10.15862/21SATS425 (https://doi.org/10.15862/21SATS425)

Full article in PDF format (file size: 1.1 MB)

For citation:

Pugin K.G., Yakontseva O.V. Optimization of the composition and performance of asphalt concrete from rock formations containing chrysotile asbestos. Russian Journal of Transport Engineering. 2025; 12(4). Available at: https://t-s.today/PDF/21SATS425.pdf (in Russian). DOI: 10.15862/21SATS425

Optimization of the composition and performance of asphalt concrete from rock formations containing chrysotile asbestos

Pugin Konstantin Georgievich
Perm State Agrarian-Technological University named after Academician D.N. Pryanishnikov, Perm, Russia
Perm National Research Polytechnic University, Perm, Russia
E-mail: 123zzz@rambler.ru
ORCID: https://orcid.org/0000-0002-1768-8177
RSCI: https://elibrary.ru/author_profile.asp?id=622336
WoS: https://www.webofscience.com/wos/author/rid/F-8610-2019
SCOPUS: https://www.scopus.com/authid/detail.url?authorId=55823720700

Yakontseva Olga Valerievna
Perm National Research Polytechnic University, Perm, Russia
E-mail: yakontseva.olga@yandex.ru
SCOPUS: https://www.scopus.com/authid/detail.url?authorId=57446060700

Abstract. This article presents the results of a comprehensive study aimed at substantiating the feasibility of using rocks containing chrysotile asbestos (using the Alapaevsk chromite massif, Ural region, as an example) as an alternative mineral raw material for the production of asphalt concrete mixtures. It is demonstrated that the rock produced at the III Dayennyi Rudnik quarry, which contains chrysotile asbestos fibers, meets the physical and technical properties requirements for asphalt concrete mixture mineral components.

To optimize the composition of the asphalt concrete mixture, the authors used a full factorial experiment with varying fiber content (0,5–2,5 %) and bitumen (5,5–7,5 %). Regression models and three-dimensional response surfaces were constructed. The optimal chrysotile asbestos fiber content was determined to be 1,2–1,8 % and bitumen content was 5,9–7,2 % (over 100 % mineral content).

The asphalt concrete composition obtained by the authors is characterized by improved performance properties: compressive strength at 50°C increases by 30–40 % compared to compositions without reinforcement, the water resistance coefficient reaches 0,95–1,00, and crack resistance at 0°C remains within acceptable limits. It was shown that the high specific surface area (10–25 m²/g) and adsorption activity of chrysotile asbestos fibers allow for the complete elimination of commercial mineral powder from the asphalt concrete mixture, thereby reducing the economic and transportation costs of its production. The use of overburden and waste from chrysotile-containing deposits helps reduce the anthropogenic impact and expand the raw material base for road construction in regions experiencing a shortage of traditional aggregates. The proposed approach enables the design of asphalt concrete mixtures with predictable characteristics while simultaneously conserving resources and reducing the cost of asphalt concrete pavement construction.

Keywords: chrysotile asbestos; asphalt concrete; reinforcement; serpentinites; road construction; bitumen; building materials

Download article in PDF format