Properties of pore structure measured by step-by-step mercury intrusion porosimetry test

Author(s): Ryo Yoshida and Toshiharu Kishi
Paper category: conference
Book title: Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. van Breugel, Wei Sun and Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Publication year: 2012
Pages: 259 - 266
Total Pages: 8
Language: English

Abstract: A unique Mercury intrusion porosimetry (MIP) method that can be used to determine volumes of continuative pore and discontinuative pore structure was proposed by authors. Using this method, a suitable maximum intrusion pressure can be selected.
In this study, pore structure properties of hardened cement paste made under several different conditions, such as water to cement ratio, curing condition, age, carbonation, and binder type, were analyzed using the proposed method.
It was found Blast furnace slag (BFS) paste cured in water, even 28-days-aged specimen, formed narrow threshold diameter whose size is less than 10 nm and stiff frame structure indestructible by the excessive high pressure intrusion. It was also found that total porosity of BFS paste is similar to that of Ordinary Portland cement (OPC) paste. However, BFS paste consisted of less continuative pores and more Ink-bottle pores than those of OPC paste.
For OPC paste with water to cement ratio of 0.60, total porosity was decreased. Remarkable decrease of continuative pore with diameter of 20-300 nm, and increase of Ink-bottle pore whose threshold diameter is less than 20 nm were observed as pore properties of carbonated OPC paste.

Online publication: 2012-05-16
Publication Type: full_text
Public price (Euros): 0.00