Ultra düşük oranlarda SWCNT ilaveli UHPC’lerin mekanik ve elektriksel özelliklerinin incelenmesi
Year 2023,
Volume: 38 Issue: 1, 509 - 520, 21.06.2022
Muhammet Seis
,
Serkan Subaşı
,
Muhammed Maraşlı
,
Heydar Dehghanpour
Abstract
Nanoteknolojinin gelişmesi ile birlikte inşaat sektöründe de özellikle yapı malzemeleri alanında spesifik özelliklere sahip nano malzemelerin kullanılması araştırmacıların ilgisini çekmektedir. Literatüre göre çimentolu malzemelerin karışımlarında karbon nanotüp (CNT)'ler kullanılabilirliği yüksek olan nano malzemeler arasında yer almaktadır. Çok duvarlı karbon nanotüp (MWCNT) ilaveli betonlar üzerinde birçok çalışma olması ile birlikte tek duvarlı karbon nanotüp (SWCNT)'lerin beton üzerinde davranışlarını inceleyen araştırmalar oldukça sınırlıdır. Bu çalışmada çimento ağırlığının % 0.0125, 0.020 ve 0.025 oranlarında SWCNT kullanılarak üretilen ultra yüksek performanslı çimentolu kompozitlerin (UHPC) mekanik ve elektriksel özellikleri araştırılmıştır. Hazırlanan 8 adet UHPC karışımlarının 4 tanesinde sadece SWCNT, 4 tanesinde ise SWCNT+ Mikro çelik fiber katılmıştır. UHPC karışımlarında mikro çelik lifler ağırlıkça %4 oranında kullanılmıştır. İletkenlik ve eğilme deneyleri 12 X 3 X 2 cm numuneler üzerinde gerçekleştirilmiştir. 28 günlük basınç dayanımları, 7 cm çapında ve 14 cm uzunluğunda silindirik numuneler kullanılarak belirlenmiştir. Elektriksel direnç ölçümü için çimentolu malzemelerin ölçümünde yaygın olan iki noktalı tek eksenli yöntem kullanılmıştır. Elde edilen sonuçlara göre SWCNT’nin UHPC’lerin mekanik özellikler üzerinde olumlu etkileri gözlenmiştir. SWCNT eklenmesi ve oranının artmasıyla elektriksel direnç azalmıştır, ancak gerçekleşen akım hızının artırılması için daha yüksek oranlarda SWCNT kullanılmasının gerekli olduğu tespit edilmiştir. Ayrıca mikro çelik lifli karışımlarda elektriksel direnç parametreleri üzerinde SWCNT’nin etkisi daha belirgin olduğu görülmüştür.
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Year 2023,
Volume: 38 Issue: 1, 509 - 520, 21.06.2022
Muhammet Seis
,
Serkan Subaşı
,
Muhammed Maraşlı
,
Heydar Dehghanpour
References
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- X. Li, W. Wei, H. Qin, Y. Hang Hu, Co-effects of graphene oxide sheets and single wall carbon nanotubes on mechanical properties of cement, J. Phys. Chem. Solids. 85 (2015) 39–43. https://doi.org/10.1016/j.jpcs.2015.04.018.
- J.M. Makar, G.W. Chan, Growth of cement hydration products on single-walled carbon nanotubes, J. Am. Ceram. Soc. 92 (2009) 1303–1310. https://doi.org/10.1111/j.1551-2916.2009.03055.x.
- H.J. Chen, Y.L. Yu, C.W. Tang, Mechanical properties of ultra-high performance concrete before and after exposure to high temperatures, Materials (Basel). 13 (2020). https://doi.org/10.3390/ma13030770.
- A. Topbas, F.O. Tulen, M. Marasli, B. Kohen, A Prefabricated UHPC Shell Pedestrian Bridge, (2019) Structural Membranes 2019-9th International Conf.
- ASTM C 1611/C 1611M, Standard Test Method for Slump Flow of Self-Consolidating Concrete, American Society for Testing and Materials. (205AD).
TS EN 12390-3, Beton – Sertleşmiş beton deneyleri - Bölüm 3 : Deney numunelerinde basınç dayanımının tayini, T Standartları Enstitüsü. (2002).
- H. Dehghanpour, K. Yilmaz, The relationship between resistances measured by two-probe, Wenner probe and C1760-12 ASTM methods in electrically conductive concretes, SN Appl. Sci. 2 (2020) 10. https://doi.org/10.1007/s42452-019-1811-7.
- ASTM C805: Standard test method for rebound number of hardened concrete, American Society for Testing and Materials (1997).
- ASTM C597: Standard test method for pulse velocity through concrete, American Society for Testing and Materials. (2009).
- A.M. Rashad, Effect of carbon nanotubes (CNTs) on the properties of traditional cementitious materials, Constr. Build. Mater. 153 (2017) 81–101. https://doi.org/10.1016/j.conbuildmat.2017.07.089.
- S. Xu, Y. Lyu, S. Xu, Q. Li, Enhancing the initial cracking fracture toughness of steel-polyvinyl alcohol hybrid fibers ultra high toughness cementitious composites by incorporating multi-walled carbon nanotubes, Constr. Build. Mater. 195 (2019) 269–282. https://doi.org/10.1016/j.conbuildmat.2018.10.133.
- L. Raki, J. Beaudoin, R. Alizadeh, J. Makar, T. Sato, Cement and concrete nanoscience and nanotechnology, Materials (Basel). 3 (2010) 918–942. https://doi.org/10.3390/ma3020918.
- J. Keriene, M. Kligys, A. Laukaitis, G. Yakovlev, A. Špokauskas, M. Aleknevičius, The influence of multi-walled carbon nanotubes additive on properties of non-autoclaved and autoclaved aerated concretes, Constr. Build. Mater. 49 (2013) 527–535. https://doi.org/10.1016/j.conbuildmat.2013.08.044.
- A. Chaipanich, T. Nochaiya, W. Wongkeo, P. Torkittikul, Compressive strength and microstructure of carbon nanotubes-fly ash cement composites, Mater. Sci. Eng. A. 527 (2010) 1063–1067. https://doi.org/10.1016/j.msea.2009.09.039.
- Y. Hu, D. Luo, P. Li, Q. Li, G. Sun, Fracture toughness enhancement of cement paste with multi-walled carbon nanotubes, Constr. Build. Mater. 70 (2014) 332–338. https://doi.org/10.1016/j.conbuildmat.2014.07.077.
- M. del C. Camacho, O. Galao, F.J. Baeza, E. Zornoza, P. Garcés, Mechanical properties and durability of CNT cement composites, Materials (Basel). 7 (2014) 1640–1651. https://doi.org/10.3390/ma7031640.
- H. Dehghanpour, K. Yilmaz, F. Afshari, M. Ipek, Electrically conductive concrete: A laboratory-based investigation and numerical analysis approach, Constr. Build. Mater. 260 (2020) 119948. https://doi.org/10.1016/j.conbuildmat.2020.119948.
- A. D’Alessandro, M. Rallini, F. Ubertini, A.L. Materazzi, J.M. Kenny, Investigations on scalable fabrication procedures for self-sensing carbon nanotube cement-matrix composites for SHM applications, Cem. Concr. Compos. 65 (2016) 200–213. https://doi.org/10.1016/j.cemconcomp.2015.11.001.
- S. Musso, J.M. Tulliani, G. Ferro, A. Tagliaferro, Influence of carbon nanotubes structure on the mechanical behavior of cement composites, Compos. Sci. Technol. 69 (2009) 1985–1990. https://doi.org/10.1016/j.compscitech.2009.05.002.
- M. Kazemi, M. Hajforoush, P.K. Talebi, M. Daneshfar, A. Shokrgozar, S. Jahandari, M. Saberian, J. Li, In-situ strength estimation of polypropylene fibre reinforced recycled aggregate concrete using Schmidt rebound hammer and point load test, J. Sustain. Cem. Mater. 9 (2020) 289–306. https://doi.org/10.1080/21650373.2020.1734983.
- K. Kovler, F. Wang, B. Muravin, Testing of concrete by rebound method: Leeb versus Schmidt hammers, Mater. Struct. Constr. 51 (2018) 1–14. https://doi.org/10.1617/s11527-018-1265-1.
- M. Kazemi, R. Madandoust, J. de Brito, Compressive strength assessment of recycled aggregate concrete using Schmidt rebound hammer and core testing, Constr. Build. Mater. 224 (2019) 630–638. https://doi.org/10.1016/j.conbuildmat.2019.07.110.
- K.J. Rao, K. Keerthi, S. Vasam, Acid resistance of quaternary blended recycled aggregate concrete, Case Stud. Constr. Mater. 8 (2018) 423–433. https://doi.org/10.1016/j.cscm.2018.03.005.
- R. Hamid, K.M. Yusof, M.F.M. Zain, A combined ultrasound method applied to high performance concrete with silica fume, Constr. Build. Mater. 24 (2010) 94–98. https://doi.org/10.1016/j.conbuildmat.2009.08.012.