Silane Bridge Deck Rating

Details

• Creators:
  Ghazal, Ahmed I. ; Myers, John J. ; ElGawady, Mohamed A.
• Corporate Creators:
  Missouri University of Science and Technology
• Corporate Contributors:
  Missouri. Department of Transportation. Construction and Materials Division
• Subject/TRT Terms:
  Bridge Decks Capillary Suction Chloride Content Chloride Penetration Composite Materials Cracked And Uncracked Concrete Cracking Electrical Resistivity Freeze-thaw Cycling Freeze Thaw Tests Frost Frost Scaling Performance Ratings Silane Silane-nanoclay Composites

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• Publication/ Report Number:
  cmr 26-010
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final Report
• Corporate Publisher:
  Missouri. Department of Transportation. Construction and Materials Division
• Abstract:
  Bridge decks are among the most vulnerable components of bridge structures due to the combined effects of multiple deterioration mechanisms, including traffic-induced abrasion, repeated freeze-thaw cycling, and chloride ingress. Surface impregnation using silane sealers has proven to be an effective method for mitigating concrete deterioration in bridge decks. In this study, the performance of various silane sealers and silane-nanoclay composite systems was extensively evaluated to assess their ability to protect bridge decks against deterioration mechanisms such as freeze-thaw cycling, capillary absorption, chloride ingress, and surface scaling. In addition, the service life of silane and silane-nanoclay composite systems was estimated. A field evaluation was conducted on bridge decks that had been in service for approximately 8 years. The evaluation included measurements of depth of penetration, static contact angle, chloride ingress, and rate of absorption. The results demonstrate that silane treatments represent a viable option for protecting bridge decks against deterioration. However, silane-nanoclay composites exhibited increased chloride ingress under aggressive exposure conditions and greater surface scaling under exposure to deicing chemicals. The field investigation demonstrated a wide range of performance among the bridge decks evaluated. Nevertheless, following early-age applications, silane treatments can be successfully reapplied at intervals of approximately 5 years to maintain long-term protective performance.
• Format:
  PDF
• Funding:
  TR202413
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:aaa1ef4a1ab6ae9551274e943691be3881a77e4cd8afa6a21d451f4fb81432eee1b4947101ad69a8f66462643e57160105a8087f7349cb4660a900f2576ba029
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/93018/dot_93018_DS1.pdf
• File Type:
  [PDF - 9.45 MB ]