PREDICTION OF THE CREEP COEFFICIENT OF MODIFIED GLASS-COMPOSITE PIPES

Sergey Shashkin; Tatyana Matseevich

doi:10.62980/2076-0655-2026-177-187

UDC

691.3

CSCSTI

67.09

Russian Classification of Professions by Education

08.06.01

Russian Trade and Bibliographic Classification

5411

Russian Library and Bibliographic Classification

382

VAK Russia

2.1.5

PREDICTION OF THE CREEP COEFFICIENT OF MODIFIED GLASS-COMPOSITE PIPES

Published in Technique and technology of silicates · Pages 177–187 · Rubric: MAIN RUBRIC

DOI: https://doi.org/10.62980/2076-0655-2026-177-187 · EDN: WGQUCU

Received: 26.03.2026 Accepted: 25.04.2026 Published: 29.04.2026 Language of publication: RUS

Authors

Sergey Shashkin

Tatyana Matseevich

Sergey Shashkin

Ishlinsky Institute for Problems in Mechanics RAS Mladshiy nauchnyy sotrudnik · Russian Federation · Moscow

Tatyana Matseevich

Academic degree: doctor of physical and mathematical sciences

Science rang: professor

National Research Moscow State University of Civil Engineering Professor · Russian Federation · Moscow

ABSTRACT

Introduction. This article presents the results of an experimental determination of the creep coefficient of glass-composite pressure pipes using long-term testing over 10,000 hours in accordance with GOST R 55077-2012. The relevance of the study is driven by the requirements of current Russian construction legislation: under the Town Planning Code of the Russian Federation and SP 35.13330.2020, the normative service life of pipeline structures is not less than 50 years, which necessitates mandatory substantiation of the long-term mechanical properties of the material. The aim of the present work is the experimental determination of the moisture creep coefficient for a control specimen of a continuous-winding glass-composite pipe and the prediction of creep coefficients over a 50-year horizon Materials and methods. The objects of study were segments of glass-composite pressure pipes of grade Dy 1000 0.6 10000, manufactured by continuous filament winding of glass roving onto a cylindrical mandrel. The control formulation contained no plasticizer; the modified formulations incorporated additives PolyPlast M, Polyplex, and Clearstrength XT100 at dosages of 10, 15, and 20% by binder mass. Long-term specific ring stiffness under creep conditions was tested in accordance with GOST R 55077-2012 (GOST 34644-2020). Specimens were placed horizontally and fully submerged in water (temperature 23±2 °C, pH = 7±2), then loaded with a diametral compressive force maintained constant throughout the entire test period of 10,000 hours. Ring deflection was measured at specified time intervals. Two specimens were tested for each formulation and the results were averaged. Results. For the control formulation of pipe grade Dy 1000 0.6 10000, the mean moisture creep coefficient αavg = 0.74 over a 50-year horizon was determined by regression analysis in logarithmic coordinates. To predict the behaviour of nine modified formulations containing plasticizers PolyPlast M, Polyplex, and Clearstrength XT100 at dosages of 10, 15, and 20%, the theoretical framework of A.A. Askadsky's molecular-kinetic theory was applied, based on the Boltzmann–Volterra integral equation with relaxation kernel T₁(τ). The method was verified against the control specimen: the coefficient of determination R² = 0.97, and the deviation between calculated and experimental load values does not exceed 0.28%. Predicted creep coefficients α₅₀ and long-term specific ring stiffness S50 were computed for all modified formulations. Conclusion. All investigated formulations satisfy S₅₀ > 5000 N/m² and comply with the 50-year normative service life requirements under current Russian legislation. The Askadsky method yields a more conservative prediction compared to the GOST method — from −3.4% to −18.4%

KEYWORDS

glass-composite pipes, creep, creep coefficient, ring stiffness, service life, A.A. Askadsky molecular-kinetic theory, relaxation kernel, GOST R 55077-2012

Funding

The work was carried out with the support of the Russian Science Foundation grant No. 24–49–02002.

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GOST

Shashkin S. V., Matseevich T. A. PREDICTION OF THE CREEP COEFFICIENT OF MODIFIED GLASS-COMPOSITE PIPES // . 2026. pp. 177-187. DOI: https://doi.org/10.62980/2076-0655-2026-177-187. EDN: WGQUCU. (Date of access 19.08.2026).

MLA

Sergey Shashkin, Matseevich T. A.. "PREDICTION OF THE CREEP COEFFICIENT OF MODIFIED GLASS-COMPOSITE PIPES." (2026): 177-187. DOI: https://doi.org/10.62980/2076-0655-2026-177-187. EDN: WGQUCU.

APA

Shashkin S. V., Matseevich T. A. (2026). PREDICTION OF THE CREEP COEFFICIENT OF MODIFIED GLASS-COMPOSITE PIPES. , 177-187. https://doi.org/10.62980/2076-0655-2026-177-187 EDN: WGQUCU.

Chicago

Sergey Shashkin, Matseevich T. A.. "PREDICTION OF THE CREEP COEFFICIENT OF MODIFIED GLASS-COMPOSITE PIPES." , no. (2026): 177-187. https://doi.org/10.62980/2076-0655-2026-177-187. EDN: WGQUCU.

WIKI

{{cite journal | author = Shashkin S. V., Matseevich T. A. | title = PREDICTION OF THE CREEP COEFFICIENT OF MODIFIED GLASS-COMPOSITE PIPES | journal = | year = 2026 | pages = 177-187 | doi = 10.62980/2076-0655-2026-177-187 }} EDN: WGQUCU

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