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Properties evaluation of double silane system compound gel as a protective coating on concrete

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Abstract

Inhibiting moisture transfer at the surface of concrete plays a vital role on the durability of concrete, and permeable protective coating can effectively resist the intrusion of external moisture into concrete. A double silane system compound gel was prepared through sol–gel synthesis method by using isobutyl triethoxy silane and tetraethyl orthosilicate, solving the problems of volatility and poor adhesion of traditional silane-based penetrating protective materials. The performance of the compound gel was verified through static contact angle, capillary water absorption of concrete with cracks, electrochemical accelerated ion penetration, and rapid carbonation tests. The test results showed that the capillary water absorption coefficient for concrete with cracks up to 0.5 mm and coating compound gel was reduced by more than 70% compared to blank; the corrosion time of inserted reinforcement in concrete treated with the compound gel was extended by more than two times compared to blank. The research of compound gel can expand the application market of silane-based protective materials, especially for some longitudinal concrete structural parts that need higher durability requirements.

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Acknowledgments

Financial support from the National Natural Science Foundation of China (Grant No. 51978355, No. 52078260), Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, and Shandong Province Marine Environment Concrete Material Corrosion Control and Monitoring Research Innovation Team.

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Authors and Affiliations

  1. School of Civil Engineering, Qingdao University of Technology, Qingdao, 266033, China

    Xu Chen, Mengjun Hu, Yongjuan Geng, Shaochun Li & Shiyu Sui

  2. Engineering Research Center of Concrete Technology under Marine Environment, Ministry of Education, Qingdao University of Technology, Qingdao, 266033, China

    Shaochun Li

  3. Jinan Huaiyin City Construction Investment Group Co., LTD, Jinan, 250000, China

    Yan Gao

  4. China West Construction Group Xinjiang Co., LTD, Urumqi, 830000, China

    Xu Chen & Youlai Zhang

  5. State owned Foundation (Beijing) Technology Co., LTD, Beijing, 102488, China

    Guozhu Liang

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  1. Xu Chen
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  2. Yan Gao
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  3. Youlai Zhang
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  4. Mengjun Hu
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Contributions

XC was involved in writing—original draft, writing—review & editing, methodology, investigation, visualization. SL helped in conceptualization, writing—review & editing. SS contributed to conceptualization, writing—review & editing. YG was involved in resources. MH helped in review & editing. YZ contributed to validation, formal analysis. YG contributed to visualization, data curation. GL helped in data curation, formal analysis.

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Correspondence to Shaochun Li or Shiyu Sui.

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Chen, X., Gao, Y., Zhang, Y. et al. Properties evaluation of double silane system compound gel as a protective coating on concrete. J Coat Technol Res 21, 329–340 (2024). https://doi.org/10.1007/s11998-023-00824-0

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  • DOI: https://doi.org/10.1007/s11998-023-00824-0

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