Evaluation of capillary pore size characteristics in high-strength concrete at early ages

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Abstract

金沢大学工学部

The quantitative scanning electron microscope-backscattered electron (SEM-BSE) image analysis was used to evaluate capillary porosity and pore size distributions in high-strength concretes at early ages. The Powers model for the hydration of cement was applied to the interpretation of the results of image analysis. The image analysis revealed that pore size distributions in concretes with an extremely low water/binder ratio of 0.25 at early ages were discontinuous in the range of finer capillary pores. However, silica-fume-containing concretes with a water/binder ratio of 0.25 had larger amounts of fine pores than did concretes without silica fume. The presence of larger amounts of fine capillary pores in the concretes with silica fume may be responsible for greater autogenous shrinkage in the silica-fume-containing concretes at early ages.

Journal

  • Cement and Concrete Composites

    Cement and Concrete Composites 35(3), 513-519, 2005-03-01

    Elsevir

Codes

  • NII Article ID (NAID)
    120000809769
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    0008-8846
  • Data Source
    IR 
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