: 37-42
Received: March 04, 2023
Revised: April 14, 2023
Accepted: May 02, 2023
Lviv Polytechnic National University, Department of building production
Lviv Polytechnic National University, Department of building рroduction
Lviv Polytechnic National University, Department of building production
Lviv Polytechnic National University, Department of building production
Lviv Polytechnic National University, Department of Building Production

The article presents the results of research on modified steel fiber-reinforced concrete and shows the expediency of their use to increase the effectiveness of fortification protection structures against shock loads. It was established that according to the results of tests of compressive strength (fсm = 79.4 MPa) and tensile strength during bending (fс, lf = 7.4 MPa), steel fiber-reinforced concrete can be classified as high-strength (strength class C 50/60) and rapid-hardening (fcm2/ fcm28 = 0.57) in accordance with DSTU EN 206:2018. Manufacturing in factory conditions of reinforced concrete elements of structures based on high-strength steel fiber-reinforced concrete with increased resistance to various types of force effects during shelling will allow to obtain quick-assembling/quick-dismantling fortification structures that will be able to provide protection for the personnel of the units of the armed forces of Ukraine.

Danica S.,  Marjanović M., & Vitorović-Todorović M. (2018). Nanotechnology for military applications: A survey of recent research in Military technical institute. Scientific Technical Review, 68(1), 59-72. doi: 10.5937/STR1801059
Kisil, O., & Mihalchenko, S. (2016). Suchasnij blok-post na osnovi intelektualnoyi vognevoyi sistemi. Suchasni problemi arhitekturi ta mistobuduvannya, 42, 300-304. http://repositary.knuba.edu.ua:8080/xmlui/handle/987654321/4330
 Hryhorovskyi, P., Osadcha, I.,  Jurelionis, A.,  Basanskyi, V.,  & Hryhorovskyi A. (2022). A BIM-Based Method for Structural Stability Assessment and Emergency Repairs of Large-Panel Buildings Damaged by Military Actions and Explosions: Evidence from Ukraine. Buildings , 12(11), 1817;  https://doi.org/10.3390/buildings12111817
Babich Y., Filipchuk S., & Karavan V. (2019). General requirements for materials of fortification protective structures. AIP Conference Proceedings 207, doi: 10.1063/1.5091865
Dvorkin, L., Zhitkovsky, V., Stepasyuk, Y., & Ribakov, Y. (2018). A method for design of high strength concrete composition considering curing temperature and duration. Construction and Building Materials, 186, 731-739. doi: 10.1016/j.conbuildmat.2018.08.014
Dvorkin L., Babich Y., & ZHitkovskij V. (2017). Visokomicni shvidkotverdnuchi betoni ta fibrobetoni. NUVGP, Rivne. 331. http://ep3.nuwm.edu.ua/id/eprint/7518 
Marushchak U., Sanytsky M., Korolko S., Shabatura Y., & Sydor N. (2018). Development of nanomodified rapid hardening fiber-reinforced concretes for special-purpose facilities. Еastern-Еuropean journal of enterprise technologies, 92, 34-41. doi: 10.15587/1729-4061.2018.127001
Korolko S., Martinyuk I., Stadnichuk O., & Gorchinskij I. (2018). Perspektivi vikoristannya bazaltovih fibrobetoniv dlya fortifikacijnih sporud, 19, 66-72. doi: 10.33577/2312-4458.19.2018.66-72
Xiang L., Weipei X., Cao F.,1 Zhishu Y., & Xiaohu L. (2019). Mechanical Properties of High-Performance Steel-Fibre-Reinforced Concrete and Its Application in Underground Mine Engineering. Materials (Basel), 12(15), 2470. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6696420
Trevor D., & Frank J. (2014). Vecchio. Behavior of Steel Fiber-Reinforced Concrete Slabs under Impact Load. ACI Structural Journal, 1213-1223. doi: 10.14359/51686923
Máca P., & Sovják. R. (2020). Resistance of ultra high performance fibre reinforced concrete to projectile impact.  Structures Under Shock and Impact XII, 261-272. doi:10.2495/SU120231
Yusof M., Norazman, Ariffin, Zain F., Risby, & CP Ng. (2010). Normal Strength Steel Fiber Reinforced Concrete Subjected to Explosive Loading. Sustainable Construction Engineering & Technology, 127-136. https://www.researchgate.net/publication/266441926
Yusof M., Nor N., Ismail A., Peng N., Sohaimi R., & Yahya M. (2013). Performance of Hybrid Steel Fibers Reinforced Concrete Subjected to Air Blast Loading. Advances in Materials Science and Engineering. doi: 10.1155/2013/420136
Fediuk R., Amran M., Klyuev S., & Klyuev A. (2021). Increasing the Performance of a Fiber-Reinforced Concrete for Protective Facilities, 9(11), 64. doi: 10.3390/fib9110064
Khan M., & Cao M. (2021). Effect of Hybrid Basalt Fibre Length and Content on Properties Of Cementitious Composites. Magazine of Concrete Research, 73(10), 487-498. doi: 10.1680/jmacr.19.00226
Moein M., Saradar A., Rahmati K., Shirkouh A., Sadrinejad I., Aramali V., & Karakouzian M. (2022). Investigation of Impact Resistance of High-Strength Portland Cement Concrete Containing Steel Fibers. Materials 15(20), 7157. doi: 10.3390/ma15207157