Proposal of a new approach for determination of pore continuity and suitable intrusion pressure based on step-by-step mercury intrusion porosimetery test

Title: Proposal of a new approach for determination of pore continuity and suitable intrusion pressure based on step-by-step mercury intrusion porosimetery test
Author(s): R. Yoshida, T. Kishi
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 1455 - 1464
Total Pages: 10
Nb references: 11
Language: English

Abstract: 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, Ink-bottle relations are most characteristic pore structure of cementitious materials and govern drying shrinkage or ion absorption. Mercury intrusion porosimetry (MIP) test is one of the most 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 be used to 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.

Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00