The Effect of Calcined Bentonite Clay on the Late-Age Electrical Conductivity of Cement Paste after Wetting and Drying Cycles
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https://doi.org/10.59287/ijanser.1494Keywords:
Cement Paste, Calcined Bentonite Clay, Electrical Conductivity, Compressive StrengthAbstract
In recent years, there has been a growing interest in the development of sustainable construction materials and technologies. One promising approach is the use of natural minerals and additives to enhance the properties of cementitious composites. Calcined bentonite clay is a natural pozzolanic material that has been shown to improve the compressive strength and durability of concrete. However, its effect on the electrical conductivity of cement paste is less well understood. This study investigates the effect of calcined bentonite clay on the electrical conductivity of cement paste after wetting and drying cycles. Cement paste samples were prepared with different proportions of calcined bentonite clay substitute (5%, 10%, 15%, 20%, 20%, 25% and 30%). The specimens were then subjected to wetting and drying cycles of 5, 10, 15, and 20 cycles. Electrical conductivity measurements were performed on the specimens after each wetting and drying cycle. The results of the study showed that calcined bentonite clay had a negative effect on the electrical conductivity of cement paste. The electrical conductivity of the specimens decreased with increasing calcined bentonite clay substitution level and with increasing number of wetting and drying cycles. Despite its negative effect on electrical conductivity, calcined bentonite clay was found to improve the compressive strength of cement paste in the long term. This suggests that calcined bentonite clay is a viable mineral additive for improving the durability of concrete, even if it is not suitable for applications where high electrical conductivity is required.
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G.M. Kim, F. Naeem, H.K. Kim, H.K. Lee, Heating and heat-dependent mechanical characteristics of CNTembedded cementitious composites, Compos Struct. 136 (2016) 162–170. https://doi.org/10.1016/j.compstruct.2015.10.010.
R.S. Ruoff, D.C. Lorents, Mechanical and thermal properties of carbon nanotubes, Carbon N Y. 33 (1995) 925–930. https://doi.org/10.1016/0008-6223(95)00021-5.
J.-P. Salvetat, J.-M. Bonard, N.H. Thomson, A.J. Kulik, L. Forró, W. Benoit, L. Zuppiroli, Mechanical properties of carbon nanotubes, Appl Phys A Mater Sci Process. 69 (1999) 255–260. https://doi.org/10.1007/s003390050999.
K. Tanaka, T. Sato, T. Yamabe, K. Okahara, K. Uchida,M. Yumura, H. Niino, S. Ohshima, Y. Kuriki, K. Yase, F. Ikazaki, Electronic properties of carbon nanotube, Chem Phys Lett. 223 (1994) 65–68. https://doi.org/10.1016/0009-2614(94)00421-8.
W. Dong, W. Li, L. Shen, D. Sheng, Piezoresistive behaviours of carbon black cement-based sensors with layer-distributed conductive rubber fibres, Mater Des. 182 (2019) 108012. https://doi.org/10.1016/j.matdes.2019.108012.
G.H. Nalon, R.F. Santos, G.E.S. de Lima, I.K.R. Andrade, L.G. Pedroti, J.C.L. Ribeiro, J.M. Franco deCarvalho, Recycling waste materials to produce selfsensing concretes for smart and sustainable structures: A review, Constr Build Mater. 325 (2022) 126658. https://doi.org/10.1016/J.CONBUILDMAT.2022.126658.
W. Dong, W. Li, K. Wang, B. Han, D. Sheng, S.P. Shah, Investigation on physicochemical and piezoresistive properties of smart MWCNT/cementitious composite exposed to elevated temperatures, Cem Concr Compos. 112 (2020) 103675. https://doi.org/10.1016/j.cemconcomp.2020.103675.
D. Hou, D. Wu, X. Wang, S. Gao, R. Yu, M. Li, P. Wang, Y. Wang, Sustainable use of red mud in ultra-high performance concrete (UHPC): Design and performance evaluation, Cem Concr Compos. 115 (2021) 103862. https://doi.org/10.1016/j.cemconcomp.2020.103862.
L. Deng, Y. Ma, J. Hu, S. Yin, X. Ouyang, J. Fu, A. Liu, Z. Zhang, Preparation and piezoresistive properties of carbon fiber-reinforced alkali-activated fly ash/slag mortar, Constr Build Mater. 222 (2019) 738–749. https://doi.org/10.1016/j.conbuildmat.2019.06.134.
D.K. Hardy, M.F. Fadden, M.J. Khattak, A. Khattab, Development and characterization of self-sensing CNF HPFRCC, Mater Struct. 49 (2016) 5327–5342. https://doi.org/10.1617/s11527-016-0863-z.
J. Tao, X. Wang, Z. Wang, Q. Zeng, Graphene nanoplatelets as an effective additive to tune the microstructures and piezoresistive properties of cementbased composites, Constr Build Mater. 209 (2019) 665–678. https://doi.org/10.1016/j.conbuildmat.2019.03.173.
A. Belli, A. Mobili, T. Bellezze, F. Tittarelli, Commercial and recycled carbon/steel fibers for fiberreinforced cement mortars with high electrical conductivity, Cem Concr Compos. 109 (2020) 103569. https://doi.org/10.1016/j.cemconcomp.2020.103569.
E. Demircilioglu, E. Teomete, O.E. Ozbulut, Strain sensitivity of steel-fiber-reinforced industrial smart concrete, J Intell Mater Syst Struct. 31 (2020) 127–136. https://doi.org/10.1177/1045389X19888722.
E. Turan, M. Oltulu, Alüminyum Talaşı Katkılı Çimento Hamurunun Mekanik ve Elektriksel Özellikleri, in: International IDU Engineering Symposium – IES’21,İzmir, Turkey, 2021, 2021.
J. Diaz-Basteris, J.C. Sacramento Rivero, B. Menéndez, Life cycle assessment of restoration mortars and binders, Constr Build Mater. 326 (2022). https://doi.org/10.1016/j.conbuildmat.2022.126863.
F. Wang, J. Huang, H. Zhao, Mechanical sandstone deterioration due to cement binder material materials under dry-wet cycling, Case Studies in Construction Materials. 18 (2023) e02169. https://doi.org/10.1016/J.CSCM.2023.E02169.
R.A. Serway, J.W. Jewett, Physics for scientists and engineers, Cengage learning, 2018.
