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Effect of salt additives on concrete degradation (Phase II). Executive summary

File Language:
English


Details

  • Creators:
    Jang, Ji-Won ; Iwasaki, Iwao ; Weiblen, Paul
  • Subject/TRT Terms:
  • Publication/ Report Number:
    MN/RC-96/10
  • Resource Type:
    Research Paper
  • Geographical Coverage:
    Minnesota
  • Corporate Publisher:
    Minnesota. Department of Transportation
  • Abstract:
    This research builds on a previous investigation, which found that corrosion-inhibitor-added deicing salts caused degradation of concrete by both anions and cations. The latest research phase looked at methods to detect the chemical reactions between concrete and corrosion-inhibitor-added deicing salts, and to determine the chemical compositions of the precipitates formed by chemical reactions between concrete and the corrosion-inhibitor-added deicing salts. The research led to the following conclusions: a simple method was developed for the detection of chemical reactions between deicing chemicals and concrete; the results provided clear evidence of the chemical reactions between concrete and the corrosion-inhibitor-added deicing salts; the different amounts of precipitates (chemical reaction products) found in the test cells were dependent on the type and concentration of corrosion-inhibitor-added deicing salts; precipitates formed by chemical reactions between deicing chemicals and concrete were identified by using chemical analysis, scanning electron microscopy, and X-ray diffraction analysis; and precipitates were calcium and/or magnesium phosphates as a major component, and gypsum as a minor component. 4 Tables, 2 figures, 2 photos, references. 6,626k, 30p.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/14720/dot_14720_DS1.pdf
  • File Type:
    Filetype[PDF - 6.47 MB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:1c53be7f84c37838f70d4986a6e4e1ce43db15ed95db6b04a5c0c6540089bb51
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