Open Access iconOpen Access

ARTICLE

crossmark

Influence of Erosion Induced by NaCl on the Mechanical Performances of Alkali-Activated Mineral Admixtures

Jing Yu1, Jie Ren2, Guangming Shen3, Weixiang Sun2, Hui Wang4,*

1 Department of Architectural Engineering, Ningbo Polytechnic, Ningbo, 315000, China
2 Technology and Performance Management Department, China Construction Infrastructure Corp., Ltd., Beijing, 10029, China
3 Chief Engineer’s Office, Jiuzhou Engineering Design Co., Ltd., Zhengzhou, 451162, China
4 School of Civil Engineering and Geographic Environment, Ningbo University, Ningbo, 315000, China

* Corresponding Author: Hui Wang. Email: email

(This article belongs to the Special Issue: Advances in Solid Waste Processing and Recycling Technologies for Civil Engineering Materials)

Fluid Dynamics & Materials Processing 2023, 19(9), 2385-2398. https://doi.org/10.32604/fdmp.2023.027877

Abstract

In this paper, the influence of NaCl freeze-thaw (F-T) cycles and dry-wet (D-W) alternations on the flexural, compressive and bonding strengths of alkali-activated fly ash (FA) and a blast furnace slag powder (BFS) is investigated. The considered NaCl concentration is 3%. The effect of polypropylene fibers on the mechanical strengths is also examined. Scanning electron microscopy (SEM), thermogravimetry (TG) and X-ray diffraction (XRD) are selected to discern the mechanisms underpinning the NaCl-induced erosion. The obtained results indicate that the best results in terms of material resistance are obtained with admixtures containing 60% BFS and 40% FA in terms of mass ratio and 3% polypropylene fibers in terms of volume ratio. The maximum rates of decrease of the flexural, compressive and bonding strengths after 300 NaCl F-T cycles are 21.5%, 20.3% and 22.6%, respectively. The corresponding rates of decrease due to NaCl D-W alternations are 28.1%, 26.1% and 31.5%, respectively. The TG curves show that the alkali-activating activity of BFS is higher than that of FA. Moreover, in the first case, the microstructure of the hydration products is more compact. The results also show that NaCl F-T cycles lead to increasing cracks in the alkali-activated BFS.

Keywords


Cite This Article

APA Style
Yu, J., Ren, J., Shen, G., Sun, W., Wang, H. (2023). Influence of erosion induced by nacl on the mechanical performances of alkali-activated mineral admixtures. Fluid Dynamics & Materials Processing, 19(9), 2385-2398. https://doi.org/10.32604/fdmp.2023.027877
Vancouver Style
Yu J, Ren J, Shen G, Sun W, Wang H. Influence of erosion induced by nacl on the mechanical performances of alkali-activated mineral admixtures. Fluid Dyn Mater Proc. 2023;19(9):2385-2398 https://doi.org/10.32604/fdmp.2023.027877
IEEE Style
J. Yu, J. Ren, G. Shen, W. Sun, and H. Wang "Influence of Erosion Induced by NaCl on the Mechanical Performances of Alkali-Activated Mineral Admixtures," Fluid Dyn. Mater. Proc., vol. 19, no. 9, pp. 2385-2398. 2023. https://doi.org/10.32604/fdmp.2023.027877



cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
  • 711

    View

  • 336

    Download

  • 0

    Like

Share Link