CHARACTERIZATION THROUGH MERCURY POROSIMETRY OF TORTUOSITY FACTORS OF CONCRETES CONTAINING MINERAL ADDITIONS

Author(s): Andrade, C., Rebolledo, N., Menéndez,E., Perez, R. and Baz, M.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 1049-1056
Total Pages: 8
Language: English

Abstract: Tortuosity is related to concrete porosity by being a concept appraising departure of the pores from a regular cylindrical shape. One of the manners for its characterization is through the ratio between the resistivity of the porous material and that of the pore solution which, following Archie’s law is equal to the porosity to the power of an exponent which results for concretes around 2. This exponent has been called tortuosity factor in a previous paper where has been shown good agreement with that calculated from a pore size distribution cumulative curve obtained through mercury porosimetry. In present paper the study is extended to concretes containing mineral additions made for the new locks of Panama Canal. The results show that the agreement with present mixes between the calculation of the tortuosity factor from resistivity or from the MIP curve is not good for all mixes and then, it is suggested to use modified Archie’s law until a full enough understanding is found with the pore size distribution.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00