Structural Mechanics of Engineering Constructions and BuildingsStructural Mechanics of Engineering Constructions and BuildingsСтроительная механика инженерных конструкций и сооружений1815-52352587-8700Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)2497210.22363/1815-5235-2020-16-5-424-434Experimental researchesЭкспериментальные исследованияResearch ArticleImproving the compressive strength of lightweight cylindrical concrete column with basalt fiber reinforced polymer acting under imposed loadПовышение прочности на сжатие цилиндрических колонн из легкого бетона под нагрузкой с помощью базальтопластикаChiadighikaobiPaschal C.ЧиадигхикаобиПаскал ЧимеремезеPh.D student of the Department of Civil Engineering of the Engineering Academyаспирант департамента строительства Инженерной академииpassydking2@mail.ruPeoples’ Friendship University of Russia (RUDN University)Российский университет дружбы народов15122020165VOL 16, NO5 (2020)ТОМ 16, №5 (2020)42443417112020Copyright ©; 2020, Chiadighikaobi P.C.Copyright ©; 2020, Чиадигхикаоби П.Ч.2020Chiadighikaobi P.C.Чиадигхикаоби П.Ч.http://creativecommons.org/licenses/by/4.0https://journals.rudn.ru/structural-mechanics/article/view/24972Relevance. The brittleness of lightweight concrete has developed concern among structural engineers. This concern led to the search on how to improve the strength of lightweight concrete and still retain the weight lightness. Researches are ongoing to solve the strength challenges noticed in lightweight concrete, but at the moment there are few works on solving the issues regarding expanded clay concrete, thus it served as a motivation for studying this issue. The aim of the work is to analyze the effects of basalt fiber polymers on lightweight expanded clay concrete columns acting under imposed loads. Methods. To achieve this process, a total number of nine expanded clay cylindrical concrete columns were experimentalized and analyzed. 1.6 % of dispersed chopped basalt fiber was used in the concrete mixture which serves as reinforcement. Also, basalt fiber mesh was used in the experimental analysis. Results. The expanded clay cylindrical column without basalt fiber polymer withstood strength up to 19.6 tons at 58 minutes, the column with dispersed chopped basalt fiber withstood strength up to 26.67 tons at 61 minutes while the column with dispersed chopped basalt fiber and basalt mesh confinement got destroyed at 29 tons at 64 minutes. The results show that lightweight expanded clay cylindrical columns confined with basalt fiber mesh withstood higher load compared to the columns with just dispersed chopped basalt fiber and without it.Актуальность. Проблема хрупкости легкого бетона все больше обращает на себя внимание инженеров-строителей, что привело к поискам способов повышения прочности легкого бетона при сохранении малого веса. Исследования с целью разрешить проблему прочности в легком бетоне продолжаются, однако на настоящий момент существует довольно мало работ по решению задачи прочности керамзитобетона, что послужило мотивацией для изучения данного вопроса. Целью статьи является анализ влияния базальтового волокна на сопротивление легких керамзитобетонных колонн нагрузке. Методы. Для достижения поставленной цели было испытано и рассчитано девять цилиндрических бетонных колонн из керамзита. В бетонную смесь добавлялось 1,6 % диспергированного рубленого базальтового волокна, которое служило для армирования бетона. Кроме того, в экспериментах использовалась сетка из базальтового волокна. Результаты. Цилиндрическая колонна из керамзита без базальтового волокна держала нагрузку до 19,6 т в течение 58 мин, колонна с диспергированным рубленым базальтовым волокном - до 26,67 т в течение 61 мин, а колонна с диспергированным рубленым базальтовым волокном, усиленная оболочкой из базальтовой сетки, разрушилась при 29 т через 64 мин. Таким образом, опыты показали, что легкие цилиндрические керамзитобетонные колонны, усиленные сеткой из базальтового волокна, выдерживают более высокие нагрузки по сравнению с колоннами только с диспергированным базальтовым волокном и с колоннами без волокна.expanded claycylindrical columnsbasalt mesh confinementstrengthconcrete columnsцилиндрические колонныкерамзитобетонусиление базальтовой сеткойпрочностьбетонные колонны1.JGJ12-2006. Technical specification for lightweight aggregate concrete structures. Beijing: China Engineering and Construction Society Press; 2006.2.Sohel K.M.A., Liew J.Y.R., Yan J.B., Zhang M.H., Chia K.S. Behavior of steel-concrete-steel sandwich structures with lightweight cement composite and novel shear connectors. Composite Structures. 2012;94:3500-3509. DOI: 10.1016/j.compstruct.2012.05.023.3.Kong F., Evans R.H. Handbook of Structural Concrete. New York: McGraw-Hill; 1983.4.Zhou Y., Liu X., Xing F., Cui H., Sui L. Axial compressive behavior of FRP-confined lightweight aggregate concrete: an experimental study and stress-strain relation model. Construction and Building Materials. 2016;119:1-15. DOI: 10.1016/j.conbuildmat.2016.02.180.5.Wang H.T., Wang L.C. Experimental study on static and dynamic mechanical properties of steel fiber reinforced lightweight aggregate concrete. Construction and Building Materials. 2013;38:1146-1151. DOI: 10.1016/j.conbuildmat.2012.09.016.6.Huang Z., Liew J.Y.R., Xiong M., Wang J. Structural behaviour of double skin composite system using ultra-lightweight cement composite. Construction and Building Materials. 2015;86:51-63. DOI: 10.1016/j.conbuildmat.2015.03.092.7.Lim J.C., Ozbakkaloglu T. Stress-strain model for normal-and light-weight concretes under uniaxial and triaxial compression. Construction and Building Materials. 2014;71:492-509. DOI: 10.1016/j.conbuildmat.2014.08.050.8.Ataur R., Madhobi M., Shantanu G. Experimental behavior of FRP confined concrete cylinder wrapped by two different FRPs. Journal of Materials Science Research. 2018;7(2):1-8.9.Saatcioglu M. Seismic design. ACI design handbook (SI edition): Design of structural reinforced concrete elements in accordance with the strength design method of ACI318M-05 (chapter 6). Farmington Hills, MI: American Concrete Institute; 2010.10.Travush V.I., Karpenko N.I., Kolchunov Vl.I., Kaprielov S.S., Demyanov A.I., Bulkin S.A., Moskovtseva V.S. Results of experimental studies of high-strength fiber reinforced concrete beams with round cross-sections under combined bending and torsion. Structural Mechanics of Engineering Constructions and Buildings. 2020;16(4):290-297. http://dx. doi.org/10.22363/1815-5235-2020-16-4-290-297 (In Russ.)11.Rubin O.D., Lisichkin S.E., Pashchenko F.A. Results of experimental researches of reinforced concrete retaining walls. Structural Mechanics of Engineering Constructions and Buildings. 2020;16(2):152-160. http:// dx.doi.org/ 10.22363/1815-5235-2020-16-2-152-160 (In Russ.)12.Richart F.E., Brandtzaeg A., Brown, R.L. A study of the failure of concrete under combined compressive stresses. Bulletin No. 185. Champaign, Ill: University of Illinois Engineering Experimental Station; 1928.13.Li P., Wu Y.F., Zhou Y., Xing F. Cyclic stress-strain model for FRP-confined concrete considering post-peak softening. Composite Structures. 2018;201:902-915. DOI: 10.1016/j.compstruct.2018.06.088.14.Zhang H., Li H., Corbi I., Corbi O., Wu G., Zhao C., Cao T. AFRP influence on parallel bamboo strand lumber beams. Sensors. 2018;18:2854. DOI: 10.3390/s18092854.15.Wang H.T., Wu G., Pang Y.Y. Theoretical and numerical study on stress intensity factors for FRP-strengthened steel plates with double-edged cracks. Sensors. 2018;18:2356. DOI: 10.3390/s18072356.16.Luo M., Li W., Hei C., Song G. Concrete infill monitoring in concrete-filled FRP tubes using a PZT-based ultrasonic time-of-flight method. Sensors. 2016;16:2083. DOI: 10.3390/s16122083.17.Yu Q.Q., Wu Y.F. Fatigue strengthening of cracked steel beams with different configurations and materials. Journal of Composite Construction. 2016;21:04016093. DOI: 10.1061/(ASCE)CC.1943-5614.0000750.18.Yu Q.Q., Wu Y.F. Fatigue durability of cracked steel beams retrofitted with high-strength materials. Construction and Building Materials. 2017;155:1188-1197. DOI: 10.1016/j.conbuildmat.2017.09.051.19.Teng J.G., Jiang T., Lam L., Luo Y.Z. Refinement of a design-oriented stress-strain model for FRP-confined concrete. Journal of Composite Construction. 2009;13:269-278. DOI: 10.1061/(ASCE)CC.1943-5614.0000012.20.Kharun M., Koroteev D.D., Dkhar P., Zdero S., Elroba S.M. Physical аnd mechanical properties оf basalt-fibered high-strength concrete. Structural Mechanics of Engineering Constructions and Buildings. 2018;14(5):396-403. http://dx.doi.org/10.22363/1815-5235-2018-14-5-396-403 (In Russ.)21.Chen C., Sui L., Xing F., Li D., Zhou Y., Li P. Predicting bond behavior of HB FRP strengthened concrete structures subjected to different confining effects. Composite Structures. 2018;187:212-225. DOI: 10.1016/ j.compstruct.2017.12.036.22.Jiang C., Wu Y.F., Jiang J.F. Effect of aggregate size on stress-strain behavior of concrete confined by fiber composites. Composite Structures. 2017;168:851-862. DOI: 10.1016/j.compstruct.2017.02.087.23.Wu Y.F., Jiang C. Quantification of bond-slip relationship for externally bonded FRP-to-concrete joints. Journal of Composite Construction. 2013;17:673-686. DOI: 10.1061/(ASCE)CC.1943-5614.0000375.24.Zhou Y., Li M., Sui L., Xing F. Effect of sulfate attack on the stress-strain relationship of FRP-confined concrete. Construction and Building Materials. 2016;110:235-250. DOI: 10.1016/j.conbuildmat.2015.12.038.25.Sui L., Luo M., Yu K., Xing F., Li P., Zhou Y., Chen C. Effect of engineered cementitious composite on the bond behavior between fiber-reinforced polymer and concrete. Composite Structures. 2018;184:775-788. DOI: 10.1016/j.compstruct.2017.10.050.26.Dai J.G., Gao W.Y., Teng J.G. Bond-slip model for FRP laminates externally bonded to concrete at elevated temperature. Journal of Composite Construction. 2013;17:217-228. DOI: 10.1061/(ASCE)CC.1943-5614.0000337.27.Zhang D., Gu X.L., Yu Q.Q., Huang H., Wan B., Jiang C. Fully probabilistic analysis of FRP-to-concrete bonded joints considering model uncertainty. Composite Structures. 2018;185:786-806. DOI: 10.1016/j.compstruct. 2017.11.058.28.Liu Z., Chen K., Li Z., Jiang X. Crack monitoring method for an FRP-strengthened steel structure based on an antenna sensor. Sensors. 2017;17:2394. DOI: 10.3390/s17102394.29.Wu Y.F., Jiang C. Effect of load eccentricity on the stress-strain relationship of FRP-confined concrete columns. Composite Structures. 2013;98:228-241. DOI: 10.1016/j.compstruct.2012.11.023.30.Teng J.G., Huang Y.L., Lam L., Ye L.P. Theoretical model for fiber-reinforced polymer-confined concrete. Journal Composite Construction. 2007;11:201-210. DOI: 10.1061/(ASCE)1090-0268(2007)11:2(201).31.Jiang J.F., Wu Y.F. Plasticity-based criterion for confinement design of FRP jacketed concrete columns. Material and Structures. 2015;49:2035-2051. DOI: 10.1617/s11527-015-0632-4.32.Wu Y.F., Jiang J.F. Effective strain of FRP for confined circular concrete columns. Composite Structures. 2013;95:479-491. DOI: 10.1016/j.compstruct.2012.08.021.33.Jiang J.F., Wu Y.F. Identification of material parameters for Drucker - Prager plasticity model for FRP confined circular concrete columns. International Journal of Solids and Structures. 2012;49:445-456. DOI: 10.1016/ j.ijsolstr.2011.10.002.34.Valvano S., Carrera E. Multilayered plate elements with node-dependent kinematics for the analysis of composite and sandwich structures. Facta Universitatis. Series: Mechanical Engineering. 2017;15:1-30. DOI: 10.22190/ FUME170315001V.35.Popov V.L. Analysis of impact on composite structures with the method of dimensionality reduction. Facta Universitatis. Series: Mechanical Engineering. 2015;13:39-46.36.Rohwer K. Models for intralaminar damage and failure of fiber composites: a review. Facta Universitatis. Series: Mechanical Engineering. 2016;14:1-19.37.GOST 10180-2012. Betony. Metody opredeleniya prochnosti po kontrol'nym obraztsam [Concretes. Methods for strength determination using reference specimens]. Moscow; 2013. (In Russ.)38.Slater E., Moni M., Alam M.S. Predicting the shear strength of steel fiber reinforced concrete beams. Construction and Building Materials. 2012;26(1):423-436. https://doi.org/10.1016/j.conbuildmat.2011.06.04239.Shafigh P., Hassanpour M., Razavi S.V., Kobraei M. An investigation of the flexural behaviour of reinforced lightweight concrete beams. International Journal of Physics and Sciences. 2011;6(10):2414-2421.40.Sepehr M.N., Kazemian H., Ghahramani E., Amrane A., Sivasankar V., Zarrabi M. Defluoridation of water via light weight expanded clay aggregate (LECA): adsorbent characterization, competing ions, chemical regeneration, equilibrium, and kinetic modeling. Journal of Taiwan Institute of Chemical Engineers. 2014;45:1821-1834.41.Md I., Sharmin N.S., Md M., Akhtar U.S.U. Effect of soda lime silica glass waste on the basic properties of clay aggregate. International Journal of Science and Engineering Research. 2016;7(4):149-153.42.Zendehzaban M., Sharifnia S., Hosseini S.N. Photocatalytic degradation of ammonia by light expanded clay aggregate (LECA)-coating of TiO2 nanoparticles. Korean Journal of Chemical Engineering. 2013;30(3):574-579.43.Fractionated quartz sand. Available from: http://www.batolit.ru/93_p.shtml (accessed: 06.02.2019).44.EN 1991-1-1 (2002) (English). Eurocode 1: Actions on structures. Part 1-1: General actions - Densities, self-weight, imposed loads for buildings (Authority: The European Union Per Regulation 305/2011, Directive 98/34/EC, Directive 2004/18/EC).45.EN 1992-1-1 (2004) (English). Eurocode 2: Design of concrete structures. Part 1-1: General rules and rules for buildings (Authority: The European Union Per Regulation 305/2011, Directive 98/34/EC, Directive 2004/18/EC).