Abstract
The effect of multi-walled carbon nanotubes (MWCNTs) on the mechanical properties and microstructure of sulfur aluminate cement (SAC) composites was investigated. The dispersed MWCNTs were added into SAC in various weight contents.The results of mechanical properties of the MWCNTs/SAC composites indicated that the addition of 0.08 wt% MWCNTs can improve the SAC compressive strength, flexural strength, and bend-press ratio by 15.54%, 52.38%, and 31.30% at maximum, respectively. The degree of SAC hydration and porosity and pore size distribution of the matrix were measured by X-ray diffraction (XRD), thermal analysis (TG/DTG), and mercury intrusion porosimetry (MIP). Results show that the addition of MWCNTs in SAC composites can promote the hydration of SAC and the formation of C-S-H gel, reduce the porosity and refine the pore size distribution of the matrix. The microstructure was characterized by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). It is found that the MWCNTs have been dispersed homogeneously between the hydration products of SAC paste and act as bridges and networks between cracks and voids, which prevents the development of the cracks and transfers the load.
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References
Iijima S. Helical Microtubules of Graphitic Carbon[J]. Nature, 1991, 354(6348): 56–58
Iijima S, Ichihashi T. Single-shell Carbon Nanotubes of 1-nm Diameter[J]. Nature, 1993, 364(6430): 603–605
Lee H, Kang D, Song Y M, et al. Heating Experiment of CNT Cementitious Composites with Single-Walled and Multiwalled Carbon Nanotubes[J]. Journal of Nanomaterials, 2017(1): 1–12
Wong E W, Sheehan P E, Lieber C M. Nanobeam Mechanics: Elasticity, Strength, and Toughness of Nanorods and Nanotubes[J]. Science, 1997, 277(5334): 1971–1975
Salvetat J P, Bonard J M, Thomson N H, et al. Mechanical Properties of Carbon Nanotubes[J]. Applied Physics A, 1999, 69(3): 255–260
Yu M F, Lourie O, Dyer M J, et al. Strength and Breaking Mechanism of Multi-walled Carbon Nanotubes under Tensile Load[J]. Science, 2000, 287(5453):637–640
Wang X, Li Q, Xie J, et al. Fabrication of Ultralong and Electrically Uniform Single-Walled Carbon Nanotubes on Clean Substrates[J]. Nano Lett., 2009, 9(9): 3137–3141
Tenent R C, Barnes T M, Bergeson J D, et al. Ultrasmooth, Large-Area, High-Uniformity, Conductive Transparent Single-Walled-Carbon-Nanotube Films for Photovoltaics Produced by Ultrasonic Spraying[J]. Advanced Materials, 2009, 21(31): 3210–3216
Treacy M M J, Krishnan A, Yianilos P N. Inferring Physical Parameters from Images of Vibrating Carbon Nanotubes[J]. Microscopy and Microanalysis, 2000, 6(04): 317–323
Treacy M M J, Ebbesen T W, Gibson J M. Exceptionally High Young’s Modulus Observed for Individual Carbon Nanotubes[J]. Nature, 1996, 381: 678–680
Yu M F. Fundamental Mechanical Properties of Carbon Nanotubes: Current Understanding and the Related Experimental Studies[J]. Journal of Engineering Materials and Technology, 2004, 126(3): 271–278
Artukovic E, Kaempgen M, Hecht D S, et al. Transparent and Flexible Carbon Nanotube Transistors[J]. Nano Letters, 2005, 5(4): 757–760
Cattanach K, KulkarniR D, Kozlov M, et al. Flexible Carbon Nanotube Sensors for Nerve Agent Stimulants[J]. Nanotechnology, 2006, 17(16): 4123
Wang B, Han Y, Liu S. Effect of Highly DispersedCarbon Nanotubes on the Flexural Toughness of Cement-based Composites[J]. Construction and Building Materials, 2013, 46: 8–12
Hu Y, Luo D, Li P, et al. Fracture Toughness Enhancement of Cement Paste with Multi-Walled Carbon Nanotubes[J]. Construction and Building Materials, 2014, 70: 332–338
Sun G, Liang R, Lu Z, et al. Mechanism of Cement/Carbon Nanotube Composites with Enhanced Mechanical Properties Achieved by Interfacial Strengthening[J]. Construction and Building Materials, 2016, 115: 87–92
Xu S, Liu J, Li Q. Mechanical Properties and Microstructure of Multi-Walled Carbon Nanotube-Reinforced Cement Paste[J]. Construction and Building Materials, 2015, 76: 16–23
Parveen S, Rana S, Fangueiro R, et al. Microstructure and Mechanical-Properties of Carbon Nanotube Reinforced Cementitious Composites Developed Using a Novel Dispersion Technique[J]. Cement and Concrete Research, 2015, 73: 215–227
Campillo I, Dolado J S, Porro A. High-Performance Nanostructured Materials for Construction[J]. Speciai, PublicationRoyal Society of Chemistry, 2004 (292): 215–226
Wang B M, Han Y, Song K, et al. The Use of Anionic Gum Arable as a Dispersant for Multi-Walled Carbon Nanotubes in an Aqueous Solution[J]. Journal of Nanoscience and Nanotechnology, 2012, 12(6): 4664–4669
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Funded by the National Natural Science Foundation of China (No.51578108), Special Fund for Scientific Research in the Public Interest by Ministry of Water Resource of the People’s Republic of China (No.201501003) and Dalian Projects of Construction Technology (No.201307)
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Wang, B., Xing, Y. & Li, J. Mechanical properties and microstructure of sulfur aluminate cement composites reinforced by multi-walled carbon nanotubes. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 33, 102–107 (2018). https://doi.org/10.1007/s11595-018-1793-0
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DOI: https://doi.org/10.1007/s11595-018-1793-0