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Investigation and Practical Application of Silica Nanoparticles Composite Underwater Repairing Materials

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  • Jingbiao Yang

    (School of Materials Science and Engineering, Central South University, Changsha 410083, China)

  • Shengxiang Deng

    (School of Mechanical and Automobile Engineering, Shanghai University of Engineering Science, Shanghai 201620, China)

  • Hui Xu

    (Lab of Nano-Biology Technology, Institute of Super-Microstructure and Ultrafast Process in Advanced Materials, School of Physics and Electronics, Central South University, Changsha 410083, China)

  • Ye Zhao

    (School of Energy Science and Engineering, Central South University, Changsha 410083, China)

  • Changda Nie

    (School of Energy Science and Engineering, Central South University, Changsha 410083, China)

  • Yongju He

    (Lab of Nano-Biology Technology, Institute of Super-Microstructure and Ultrafast Process in Advanced Materials, School of Physics and Electronics, Central South University, Changsha 410083, China)

Abstract

Repairing materials are well-known to play an important role in rehabilitating and extending the service life for hydraulic concrete structures. However, current underwater repairing materials possess several problems, including insufficient bond tensile strength, inconsistency with the deformation of the old substrate, and insufficient underwater self-sealing ability. In the present paper, an experimental study was carried out to evaluate the influence of silica nanoparticles (SNs) on the properties of underwater composite-repairing materials. The underwater deformation, impermeability, bond tensile strength, and compressive strength of the SN-modified underwater composite-repairing materials were used as the properties’ evaluation indices. The results show that, within a certain range, the performance of the repairing material increase with increased SN percent. The deformability, impermeability grade, underwater bond tensile strength, and compressive strength of the SN-modified composite underwater repairing materials are 2.2%, 8, 2.91 MPa, and 115.87 MPa, respectively, when the mass ratio of the mortar, the curing agent and the SNs is 8:1:0.002. The proposed material is employed to repair the dam for a hydropower station in Guizhou province, China. Results show the seepage discharge is reduced by 8.6% when the dam is repaired. The annual average generating capacity is increased by 1.104 × 10 5 kWh. Meanwhile, CO 2 and NOx emissions are reduced by 1.049 × 10 5 and 220.8 kg annually, respectively.

Suggested Citation

  • Jingbiao Yang & Shengxiang Deng & Hui Xu & Ye Zhao & Changda Nie & Yongju He, 2021. "Investigation and Practical Application of Silica Nanoparticles Composite Underwater Repairing Materials," Energies, MDPI, vol. 14(9), pages 1-10, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:9:p:2423-:d:542459
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    1. Nazari, S. & Shahhoseini, O. & Sohrabi-Kashani, A. & Davari, S. & Paydar, R. & Delavar-Moghadam, Z., 2010. "Experimental determination and analysis of CO2, SO2 and NOx emission factors in Iran’s thermal power plants," Energy, Elsevier, vol. 35(7), pages 2992-2998.
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    Cited by:

    1. Grzegorz Ludwik Golewski, 2022. "Combined Effect of Coal Fly Ash (CFA) and Nanosilica (nS) on the Strength Parameters and Microstructural Properties of Eco-Friendly Concrete," Energies, MDPI, vol. 16(1), pages 1-16, December.

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