Nano- and Micro-Modification of Building Reinforcing Bars of Various Types
Fiber-reinforced plastic (FRP) rebar has drawbacks that can limit its scope, such as poor heat resistance, decrease its strength over time, and under the influence of substances with an alkaline medium, as well as the drawback of a low modulus of elasticity and deformation. Thus, the aim of the arti...
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doaj-0c843c083479426fb5da830d9835ad7a2021-03-25T00:07:01ZengMDPI AGCrystals2073-43522021-03-011132332310.3390/cryst11040323Nano- and Micro-Modification of Building Reinforcing Bars of Various TypesAleksandr Rudenko0Alexander Biryukov1Oleg Kerzhentsev2Roman Fediuk3Nikolai Vatin4Yuriy Vasilev5Sergey Klyuev6Mugahed Amran7Maciej Szelag8Military Academy of Material and Technical Support n.a. Army General A.V. Khrulev, 191123 St. Petersburg, RussiaMilitary Academy of Material and Technical Support n.a. Army General A.V. Khrulev, 191123 St. Petersburg, RussiaTogliatti State University, 445020 Togliatti, RussiaPolytechnic Institute, Far Eastern Federal University, 690922 Vladivostok, RussiaPeter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, RussiaMoscow Automobile and Road Construction University, 125319 Moscow, RussiaDepartment of Theoretical Mechanics and Strength of Materials, Belgorod State Technological University named after V.G. Shukhov, 308012 Belgorod, RussiaDepartment of Civil Engineering, College of Engineering, Prince Sattam Bin Abdulaziz University, Alkharj 11942, Saudi ArabiaDepartment of Building Construction, Lublin University of Technology, 20-618 Lublin, PolandFiber-reinforced plastic (FRP) rebar has drawbacks that can limit its scope, such as poor heat resistance, decrease its strength over time, and under the influence of substances with an alkaline medium, as well as the drawback of a low modulus of elasticity and deformation. Thus, the aim of the article is the nano- and micro-modification of building reinforcing bars using FRP rebars made of basalt fibers, which were impregnated with a thermosetting polymer binder with micro- or nanoparticles. The research discusses the major results of the developed composite reinforcement with the addition of micro- and nanosized particles. The microstructure of FRP has been studied using scanning electron microscopy. It was revealed that dispersion-strengthened polymer composites with the inclusion of microsilica (SiO<sub>2</sub>) and nanosized aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) particles have a much higher modulus of elasticity and strength when compared with the original polymer materials. In the course of the experiment, we also studied the retained plastic properties that are characterized by the absence of fragility. However, it was found that the high strength of materials was attained with a particle size of 10–500 nm, evenly distributed in the matrix, with an average distance between particles of 100–500 nm. It was also exhibited that composite reinforcement had improved the adhesion characteristics in comparison with both steel reinforcement (1.5–2 times, depending on the diameter), and with traditional unmodified FRP rebar (about 1.5 times). Thus, the use of micro-/nanosized powders increased the limit of the possible temperature range for the use and application of polymeric materials by almost two times, up to 286–320 °С, which will undoubtedly expand the range of the technological applications of products made of these materials.https://www.mdpi.com/2073-4352/11/4/323composite rebarpolymeric materialsaluminum oxidemicrosilicananoparticlesthermomechanical properties of materials |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Aleksandr Rudenko Alexander Biryukov Oleg Kerzhentsev Roman Fediuk Nikolai Vatin Yuriy Vasilev Sergey Klyuev Mugahed Amran Maciej Szelag |
spellingShingle |
Aleksandr Rudenko Alexander Biryukov Oleg Kerzhentsev Roman Fediuk Nikolai Vatin Yuriy Vasilev Sergey Klyuev Mugahed Amran Maciej Szelag Nano- and Micro-Modification of Building Reinforcing Bars of Various Types Crystals composite rebar polymeric materials aluminum oxide microsilica nanoparticles thermomechanical properties of materials |
author_facet |
Aleksandr Rudenko Alexander Biryukov Oleg Kerzhentsev Roman Fediuk Nikolai Vatin Yuriy Vasilev Sergey Klyuev Mugahed Amran Maciej Szelag |
author_sort |
Aleksandr Rudenko |
title |
Nano- and Micro-Modification of Building Reinforcing Bars of Various Types |
title_short |
Nano- and Micro-Modification of Building Reinforcing Bars of Various Types |
title_full |
Nano- and Micro-Modification of Building Reinforcing Bars of Various Types |
title_fullStr |
Nano- and Micro-Modification of Building Reinforcing Bars of Various Types |
title_full_unstemmed |
Nano- and Micro-Modification of Building Reinforcing Bars of Various Types |
title_sort |
nano- and micro-modification of building reinforcing bars of various types |
publisher |
MDPI AG |
series |
Crystals |
issn |
2073-4352 |
publishDate |
2021-03-01 |
description |
Fiber-reinforced plastic (FRP) rebar has drawbacks that can limit its scope, such as poor heat resistance, decrease its strength over time, and under the influence of substances with an alkaline medium, as well as the drawback of a low modulus of elasticity and deformation. Thus, the aim of the article is the nano- and micro-modification of building reinforcing bars using FRP rebars made of basalt fibers, which were impregnated with a thermosetting polymer binder with micro- or nanoparticles. The research discusses the major results of the developed composite reinforcement with the addition of micro- and nanosized particles. The microstructure of FRP has been studied using scanning electron microscopy. It was revealed that dispersion-strengthened polymer composites with the inclusion of microsilica (SiO<sub>2</sub>) and nanosized aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) particles have a much higher modulus of elasticity and strength when compared with the original polymer materials. In the course of the experiment, we also studied the retained plastic properties that are characterized by the absence of fragility. However, it was found that the high strength of materials was attained with a particle size of 10–500 nm, evenly distributed in the matrix, with an average distance between particles of 100–500 nm. It was also exhibited that composite reinforcement had improved the adhesion characteristics in comparison with both steel reinforcement (1.5–2 times, depending on the diameter), and with traditional unmodified FRP rebar (about 1.5 times). Thus, the use of micro-/nanosized powders increased the limit of the possible temperature range for the use and application of polymeric materials by almost two times, up to 286–320 °С, which will undoubtedly expand the range of the technological applications of products made of these materials. |
topic |
composite rebar polymeric materials aluminum oxide microsilica nanoparticles thermomechanical properties of materials |
url |
https://www.mdpi.com/2073-4352/11/4/323 |
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