DIFFUSIVITY OF CHLORIDES FROM SEAWATER INTO HIGH-STRENGTH LIGHTWEIGHT CONCRETE

As part of a more comprehensive research program on high-strength lightweight concrete, test results on the diffusivity of chlorides from natural seawater are presented. The chloride diffusivity of the various concrete mixes was very low. Of the various material parameters included in the test program, it was the presence of silica fume that had the most dominating effect on the diffusivity. Nine percent replacement of the cement by silica fume reduced the chloride diffusivity by a factor of about 5, while an increasing content of the total amount of cementitious materials decreased the diffusivity by a factor of about 2. Five different types of lightweight aggregate with increasing particle densities were used. The difference of the concretes with the least dense aggregate was about two times higher than those obtained with the most dense aggregate. Type of fine aggregate and maximum aggregate size had only a minor effect on the chloride diffusivity. The impact of the obtained chloride diffusivity on service life is also discussed.

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  • Corporate Authors:

    American Concrete Institute

    P.O. Box 19150, Redford Station, 22400 Seven Mile Road
    Detroit, MI  United States  48219
  • Authors:
    • Gjorv, O E
    • Tan, Kang Hai
    • Zhang, M-H
  • Publication Date: 1994-9

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00667543
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 30 1994 12:00AM