Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9675797 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2005 | 9 Pages |
Abstract
ESEM observations clearly show that the mechanical compaction influences the textural behavior when the bentonite MX80 is submitted to a hydration/dehydration cycle. In general, the inter-aggregate pores are open during hydration stage and sometimes there is an aggregate cracking. This phenomenon is more significant when mechanical compaction increases since the cohesion force of inter-aggregates at high mechanical compaction “49 and 63Â MPa” limits the free swelling of MX80 bentonite. In addition, Hg-porosimetry shows that only the macro-porosity (porous size >50Â nm) and eventually the meso-porosity (porous size between 2 and 50Â nm) are affected by the mechanical compaction. In fact, the total porosity decreases when the mechanical compaction increases. On other hand, BET measurements and adsorption isotherms of water vapour show a non-significant impact on the microporosity.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
G. Montes-H, Y. Geraud, J. Duplay, T. Reuschlé,