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Improving the strength of cement mortar by adding ether organics to aluminum sulfate liquid accelerator

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Abstract

It is insufficient to enhance the strength of shotcrete by simply relying on the early strength component aluminum sulfate in the liquid accelerator. The introduction of organic additives can effectively compensate for this deficiency. In this study, three different structures of organic ethers, 18-crown-6 (ECS), tetraethylene glycol monomethyl ether (Tg), and ethylene glycol monomethyl ether (Eg), were added to an aluminum sulfate alkali-free liquid accelerator, and their effects were comprehensively investigated. The results revealed that these organic ethers were capable of bolstering the strength of the mortar after 28 d. The efficiency of these ether organics on the strength of cement mixed with the accelerator followed the order: ECS > Tg > Eg. Specifically, when the ECS content reached 0.3%, the compressive strength of the mortar at 1 d was measured at 8.07 MPa. In addition, changes in the phase composition and micromorphology were scrutinized through X-ray diffraction and scanning electron microscopy, culminating in the establishment of a mechanistic model elucidating the hydration process of organic ether accelerator cement.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China [Grant Numbers 51974218]. Basic Research Fund project of Xi’an University of Architecture and Technology [Grant Numbers JC1406].

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Authors and Affiliations

  1. College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China

    Wan Zhang, Zhihong Wu, Wang Huang & Jiayuan Liu

  2. College of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, Shaanxi, China

    Huafeng Zhou

  3. Shaanxi Tong Zhi Ning New Materials Co., Ltd, Xi’an, 710055, China

    Junlong Qiu

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  1. Wan Zhang
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Contributions

Wan Zhang: Investigation, Validation, Formal analysis, Data curation, Writing-original draft. Zhihong Wu: Methodology, Formal analysis, Data curation, Resources, Writing-original draft, Supervision, Project administration, Funding acquisition. Wang Huang: Formal analysis, Investigation. Jiayuan Liu: Formal analysis, Data curation. Huafeng Zhou: Formal analysis, Validation, Funding acquisition. Junlong Qiu: Resources, Project administration.

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Correspondence to Zhihong Wu.

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Zhang, W., Wu, Z., Huang, W. et al. Improving the strength of cement mortar by adding ether organics to aluminum sulfate liquid accelerator. Mater Struct 57, 105 (2024). https://doi.org/10.1617/s11527-024-02383-1

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