Influence of the metakaolin on porous structure of matrixes based in mk/cement
The incorporation of pozzolanic materials in the manufacturing of blended cement has a positive effect on the improvement of blended mortar and concretes performances. These active additions modify porous structure, impeding or delaying the access of aggressive solutions and, therefore materials more durable are possible of obtaining. An increase or decrease on the durability of blended pastes, mortars and concretes will depend on chemical and mineralogical compositions, fineness and reaction kinetics of these pozzolans. The current work shows the results of a research carried out in blended pastes to know the effect of activated material (metakaolin) on the microporosity of pastes elaborated with different amounts of mk (0-25%). A water/ binder ratio of 0,55 was used. Samples were cured at 20ºC for 360 days. The evolution of total, capilary and gel porosity as well as average pore size were carried out through mercury intrusion porosimeter (MIP). Also, the helium pycnometer as alternative method to obtain additional information about porosity above 1,4 Å was used. A good correlation between both methods has been obtained. In addition, it is proposed the best mk content for the elaboration of mk-blended pastes.
How to Cite
Copyright (c) 2000 Consejo Superior de Investigaciones Científicas (CSIC)
This work is licensed under a Creative Commons Attribution 4.0 International License.© CSIC. Manuscripts published in both the printed and online versions of this Journal are the property of Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.
All contents of this electronic edition, except where otherwise noted, are distributed under a “Creative Commons Attribution 4.0 International” (CC BY 4.0) License. You may read here the basic information and the legal text of the license. The indication of the CC BY 4.0 License must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the published by the Editor, is not allowed.