Bulletin of the Chinese Ceramic Society, Volume. 43, Issue 12, 4330(2024)

Effect of Aluminum Sulfate Based Alkali-Free Liquid Accelerator Modified by Aluminum Formate on Cement Properties

LIU Yuan1...2, ZHU Fangfang3, ZHANG Yuanyong1,2, YANG Anxu1,2 and YANG Lin3,* |Show fewer author(s)
Author Affiliations
  • 1Tianwei Building Materials Technology Co., Ltd., Guiyang 550009, China
  • 2Sub-Research Centre for Tunnel Structure Construction Technology, National Engineering Research Centre for High-Speed Railway Construction Technology, Changsha 410075, China
  • 3School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China
  • show less

    Aluminum formate was used to modify aluminum sulfate based alkali-free liquid accelerator, and the performance index of alkali-free liquid accelerator modified by aluminum formate was tested in this paper. XRD, SEM, TG-DTG and hydration thermal analysis were used to analyze the effect of aluminum sulfate based alkali-free liquid accelerator modified by aluminum formate on the hydration process of cement. The results show that with the increase of aluminum formate content in aluminium sulfate based alkali-free liquid accelerator, the quick setting effect and strength of cement show a trend of increasing first and then decreasing. When the modified content of aluminum formate is 1% (based on the mass percentage of aluminum sulfate), the properties of cement with 8% modified aluminum sulfate based alkali-free liquid accelerator are as follows: initial setting time of 2 min 39 s, final setting time of 5 min 33 s, 1 d compressive strength of 13.2 MPa, 28 d compressive strength of 49.6 MPa, 28 d compressive strength ratio of 114%, and 90 d compressive strength retention rate of 123%, which meets the technical index requirements of the standard “Flash setting admixtures for shotcrete” (GB/T 35159—2017). When the modified content of aluminum formate exceeds 1%, a large amount of AFt inhibits the hydration reaction of C3S in cement, resulting in the early and late strength reduction.

    Tools

    Get Citation

    Copy Citation Text

    LIU Yuan, ZHU Fangfang, ZHANG Yuanyong, YANG Anxu, YANG Lin. Effect of Aluminum Sulfate Based Alkali-Free Liquid Accelerator Modified by Aluminum Formate on Cement Properties[J]. Bulletin of the Chinese Ceramic Society, 2024, 43(12): 4330

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category:

    Received: Jun. 2, 2024

    Accepted: Jan. 10, 2025

    Published Online: Jan. 10, 2025

    The Author Email: Lin YANG (ce.lyang@gzu.edu.cn)

    DOI:

    CSTR:32186.14.

    Topics