Al Manhal Palace, a key example of modern Emirati heritage in Abu Dhabi, UAE, faces significant threat from increasing chloride and sulphate-induced degradation in the reinforced concrete. This paper is based on material investigations conducted on Al Manhal Palace from 2019 to 2023 to evaluate its structural and material performance. Sulphate Several structural and material tests were conducted, with the major investigations detailed in this article including Compressive Strength of concrete (ASTM C-42), Depth of Carbonation (RILEM CPC-18), Chloride contamination profiles (ASTM C1152), and Sulphate contents (BS 1881). A significant increase was observed in chloride and sulphate ion concentrations across all test locations and structural elements. Chloride levels exceeded the acceptable limit of 0.03% by dry weight of concrete, while sulphate levels also surpassed the acceptable range of 0.44% by dry weight. To mitigate further deterioration due to these high concentrations, different solutions will be explored, including Cathodic Protection (CCP), Electrochemical Chloride Extraction (ECE), and Chemical Salt Extraction (CSE). The trial application of these methods would aim to help contractors build capacity for successful implementation. The findings will provide crucial insights for informed decision-making in the restoration of Al Manhal Palace and other modern heritage structures in similar environments.

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Long Term Assessment of the Impact of Chloride and Sulphate Ingress on a Modern Heritage Building: A Case Study of Al Manhal Palace

  • Tayyaba Bibi,
  • Hassan Dankar,
  • Amel Chabbi,
  • Yasmeen Al Rashdi

摘要

Al Manhal Palace, a key example of modern Emirati heritage in Abu Dhabi, UAE, faces significant threat from increasing chloride and sulphate-induced degradation in the reinforced concrete. This paper is based on material investigations conducted on Al Manhal Palace from 2019 to 2023 to evaluate its structural and material performance. Sulphate Several structural and material tests were conducted, with the major investigations detailed in this article including Compressive Strength of concrete (ASTM C-42), Depth of Carbonation (RILEM CPC-18), Chloride contamination profiles (ASTM C1152), and Sulphate contents (BS 1881). A significant increase was observed in chloride and sulphate ion concentrations across all test locations and structural elements. Chloride levels exceeded the acceptable limit of 0.03% by dry weight of concrete, while sulphate levels also surpassed the acceptable range of 0.44% by dry weight. To mitigate further deterioration due to these high concentrations, different solutions will be explored, including Cathodic Protection (CCP), Electrochemical Chloride Extraction (ECE), and Chemical Salt Extraction (CSE). The trial application of these methods would aim to help contractors build capacity for successful implementation. The findings will provide crucial insights for informed decision-making in the restoration of Al Manhal Palace and other modern heritage structures in similar environments.