PSI - Issue 30

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2020) 000–000 il l li t . i i t. tr t r l I t rit r i ( )

www.elsevier.com/locate/procedia . l i r. /l t / r i

ScienceDirect

Procedia Structural Integrity 30 (2020) 173–178

© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the EURASTRENCOLD - 2020 guest editors Abstract In the work, basalt fiber reinforced polymer rebars exposed in the climatic conditions of the North for 51 months have been investigated. To study the formation of macrodamages, fractographic and structural studies of longitudinal sections of the rebars were carried out. The open porosity of basalt fiber reinforced polymer rebars was investigated by the method of hydrostatic weighing. The influence of microdamages on the formation of open porosity of basalt fiber reinforced polymer rebars during their aging is shown. It has been found that degradation of basalt fiber reinforced polymer rebars leads to a significant increase in their open porosity. A linear expression is proposed to assess the average porosity of basalt fiber reinforced polymer rebars depending on their diameter, the concentration of reinforcing fiber rovings, etc. Estimated calculations of the average porosity of basalt fiber reinforced polymer rebars with their uniform degradation from the outer surface under the influence of the external environment have been carried out. A satisfactory correlation of estimated calculations and experimental data of average porosity at small diameters of basalt fiber reinforced polymer rebars (with diameters of 6 and 8 mm.) © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) t , lt i i l i t li ti iti t t t i ti t . t t ti , t i t t l t i l it i l ti t i t. it lt i i l i ti t t t t ti i i . i l i t ti it lt i i l i t i i i . t t t ti lt i i l l t i i i t i i t i it . li i i t t it lt i i l i t i i t , t t ti i i i i , t . ti t l l ti t it lt i i l it t i i ti t t t i l t t l i t i t. ti t l ti ti t l l ti i t l t it t ll i t lt i i l it i t . © 2020 The Authors. Published by ELS . . This is an open access article under the CC BY-NC-ND license (https://cre ti . /li / / . IX Eurasian Symposium on the problems of strength and resource in low climatic temperatures (EURASTRENCOLD-2020) Research of Formation of Macro-Damages on Surface of Basalt Fiber Reinforced Polymer Rebar in an Extremely Cold Climate Kychkin A.K. a , Struchkov N.F. a, *, Vinokurov G.G. a , Vasilieva M.I. a , Kychkin A.A. a , Dyakonov A.A. a , a Larionov Institute of the physical-technical problems of the North SB RAS, Yakutsk 677980, 1 Oktyabrskaya st., Russian Federation I tit t f t i l-t i l l f t t , t , t t., i ti Peer-review under responsibility of the EURASTRENCOLD - 2020 guest editors Keywords: composite materials, basalt plastics, climatic testing, aging, microdamage, porosity. i ilit t t it : it t ri l , lt l ti , li ti t ti , i , i r , r it . a i i

* Corresponding author. Tel.: +7-4112-390597; fax: +7-4112-336665. E-mail address: struchkov_n@rambler.ru i t r. l.: - - ; f : - - . - il : tr r l r.r rr

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2452-3216 © 2020 The Authors. Published by ELSEVIER B.V. This is an open-access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of the EURASTRENCOLD - 2020 guest editors i i - rti l r t - - li ( tt :// r ti . r /li / - - / . ) r-r i r t r i ilit f t t it

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the EURASTRENCOLD - 2020 guest editors 10.1016/j.prostr.2020.12.027