Combined Action of Epoxy Composite and Protective Coating with Cement Concrete in the Adhesive Contact Zone

Number of journal: 4-2023
Autors:

Khozin V.G.,
Gizdatullin A.R.,
Mirsayapov I.T.,
Yarullin R.R.,
Borovskikh I.V.

DOI: https://doi.org/10.31659/0585-430X-2023-812-4-24-31
УДК: 691.328.4

 

AbstractAbout AuthorsReferences
Under the assumption of mutual reinforcement of epoxy polymer and cement concrete that are different in chemical nature and mechanical properties in the zone of strong adhesive contact, the concrete beams with the polymer composite reinforcements (PCR) based on the epoxy binder, and the reinforced concrete beams with the cold setting epoxy composite coatings of the tension region surfaces were experimentally studied. It was found that the beams reinforced by PCR with a small diameter (and a large specific surface area of contact with concrete) exhibited a higher bending stiffness and load-bearing capacity compared to that of the concrete beams, which were reinforced by PCR with a large diameter and an equal total cross-sectional area. This effect was attributed to a restraining effect of the rigid concrete matrix on the deformation of the pliable epoxy composite in the zone of strong adhesive contact. In the case of the reinforced concrete beams with the epoxy coatings on the tension region, the cement concrete in the area adjacent to the coating (3–4 cm from the contact boundary) deformed together with the coating without cracking; cracks initiate beyond the 3–4 cm layer at a bending moment more than 2 times greater than in the reinforced concrete beams without any coating, and the crack width was 5–10 times less. Both effects of the deformation restraint should be taken into account when designing concrete bending structures operated in aggressive environments.
V.G. KHOZIN1, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.R. GIZDATULLIN2, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
I.T. MIRSAYAPOV1, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
R.R. YARULLIN3, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.);
I.V. BOROVSKIKH1, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

1 Kazan State University of Architecture and Engineering (1, Zelenaya Street, Kazan, 420043, Russian Federation)
2 “KazInzhProekt” OOO (9, Zhukovskogo Street, Kazan, 420015, Russian Federation)
3 “RTM – Inzheneriya” OOO (7, Nurlatskaya Street, Gorodok Ter. Snt., Pestrechinskii region 422788, Russian Federation

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For citation: Khozin V.G., Gizdatullin A.R., Mirsayapov I.T., Yarullin R.R., Borovskikh I.V. Combined action of epoxy composite and protective coating with cement concrete in the adhesive contact zone. Stroitel’nye Materialy [Construction Materials]. 2023. No. 4, pp. 24–31. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2023-812-4-24-31


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