IDEAS home Printed from https://ideas.repec.org/a/gam/jsusta/v14y2022i16p9876-d884917.html
   My bibliography  Save this article

Evaluation of the Surface Performance of Mortar Matrix Subjected to Sodium Chloride Solution Modified with Hybrid Nanosilica Cement Paste

Author

Listed:
  • Kai Lyu

    (College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China
    Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China)

  • Junjie Xu

    (College of Mechanics and Materials Engineering, Hohai University, Nanjing 210098, China)

  • Yue Gu

    (College of Mechanics and Materials Engineering, Hohai University, Nanjing 210098, China)

  • Kailun Xia

    (College of Mechanics and Materials Engineering, Hohai University, Nanjing 210098, China)

  • Lei Wang

    (College of Mechanics and Materials Engineering, Hohai University, Nanjing 210098, China)

  • Weiwei Liu

    (College of Mechanics and Materials Engineering, Hohai University, Nanjing 210098, China)

  • Xian Xie

    (College of Mechanics and Materials Engineering, Hohai University, Nanjing 210098, China)

Abstract

In order to prolong the service life of cement-based materials subjected to external chloride ion attacks, two kinds of methods, a surface treatment and chloride immobilization, were combined by fabricating a nanosilica-modified cement paste and coating it on mortar samples as a surface treatment material (HSM). The protective effect of the HSM was evaluated according to its surface hardness, and an RCM test was carried out, which indicated that the attached layer could both increase the surface hardness and decrease the chloride diffusion coefficient. Then, the chloride immobilization mechanisms were illustrated in terms of chloride blocking resistance, chemical binding and physical binding X-ray diffraction (XRD), and thermogravimetric/derivative thermogravimetric (TG/DTG) and thermodynamic modeling. The results showed that the hybrid nanomaterials that modified the cementitious surface treatment materials may effectively improve the chloride-resistant property of a matrix with content of no more than 1%. This research outcome could provide evidence that hybrid nanosilica can be applied in surface treatment technology.

Suggested Citation

  • Kai Lyu & Junjie Xu & Yue Gu & Kailun Xia & Lei Wang & Weiwei Liu & Xian Xie, 2022. "Evaluation of the Surface Performance of Mortar Matrix Subjected to Sodium Chloride Solution Modified with Hybrid Nanosilica Cement Paste," Sustainability, MDPI, vol. 14(16), pages 1-15, August.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:16:p:9876-:d:884917
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2071-1050/14/16/9876/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2071-1050/14/16/9876/
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jsusta:v:14:y:2022:i:16:p:9876-:d:884917. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.