SEISAN KENKYU
Online ISSN : 1881-2058
Print ISSN : 0037-105X
ISSN-L : 0037-105X
Volume 60 , Issue 5
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  • Toshiharu KISHI, Ryo YOSHIDA
    2008 Volume 60 Issue 5 Pages 512-515
    Published: 2008
    Released: October 22, 2008
    JOURNAL FREE ACCESS
       Hardened cementitious materials consist of various kinds of pores, like gel pores, capillary pores, air voids and so on, whose size and shape distribution is often called pore structure. However, the connection between these pores, which creates Ink-bottle relation and dominate drying shrinkage or ion absorption. Mercury intrusion porosimetry (MIP) test is one of the widely used methods to study the pore structure of cementitious materials. However, it is well known that the evaluation of pore structure by MIP is not totally accurate. The main reasons are the ink-bottle effect and the destruction of pores due to excessive high pressure.
    A unique method that can determine volumes of continuative pore and discontinuative pore structure is proposed. Furthermore, according to this method, a suitable maximum intrusion pressure can be selected. In this study, boundary pore between capillary and gel pores is found using the results of the proposed method. [This abstract is not included in the PDF]
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  • Ryo YOSHIDA, Toshiharu KISHI
    2008 Volume 60 Issue 5 Pages 516-519
    Published: 2008
    Released: October 22, 2008
    JOURNAL FREE ACCESS
       It is well known that the evaluation of pore structure by mercury intrusion porosimetry (MIP) is not totally accurate. The main reasons are the ink-bottle effect and the destruction of specimens due to excessive high pressure. Since mercury is intruded continuously from surface to inside of specimen, MIP test can obtain information about pore continuity. A unique method that can determine volumes of connected pores and ink-bottle pore structures is proposed. Also, the method can select a suitable maximum intrusion pressure. [This abstract is not included in the PDF]
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