MODIFICATION OF PORE CHEMICALS IN EVALUATION OF HIGH-PERFORMANCE CONCRETE PERMEABILITY

The pore chemicals and pore fluid conductivity of concrete vary greatly. If the measured conductivity of concrete is used to evaluate the permeability of concrete, it should be modified with the pore fluid conductivity of concrete. Because it is difficult to obtain the pore fluid from high-performance concrete (HPC) by the conventional method of expression of concrete, this paper puts forward a new method for the modification of pore chemicals in the evaluation of HPC permeability. When a mineral admixture like silica fume, slag, fly ash, or zeolite is used to replace some of the cement, or NaNO2 is used as a chemical admixture in concrete, and the modified resistance of concrete is used to reflect its permeability, the permeability of most concrete decreases. But if the influence of pore chemicals is not considered, the benefit of mineral admixtures on reducing concrete permeability will be overevaluated and that of NaNO2 will be underevalauted.

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  • Supplemental Notes:
    • This research work was supported by China Natural Science Foundation (Research Project 59338120), Natural Science Foundation of Shandong Province (Research Project Y96F08090), and the Foundation of Metallurgical Department.
  • Corporate Authors:

    American Concrete Institute (ACI)

    38800 Country Club Drive
    Farmington Hills, MI  United States  48331
  • Authors:
    • Zhao, T-J
    • Zhu, J-Q
    • Chi, P-Y
  • Publication Date: 1999-1

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00762907
  • Record Type: Publication
  • Contract Numbers: CMS-9601262, AMB96-0415, MAT97-1022
  • Files: TRIS
  • Created Date: May 1 2001 12:00AM