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Institutional Repository [SANDBOX]
Technical University of Crete
Technical University of Crete
EN
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| URI: | http://purl.tuc.gr/dl/dias/7DC4B4E7-5167-4E3C-B6FE-1985C2D86FDB | ||
| Year | 2014 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
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| Bibliographic Citation | Y. C. Chemeda , G.E. Christidis , N.M. T. Khana, E. Koutsopoulou , V. Hatzistamou , V.C. Kelessidis ,"Rheological properties of palygorskite– bentonite and sepiolite–bentonite mixed clay suspensions ",Ap. C. Sc. ,vol. 90 ,pp.165–174 ,2014.doi :10.1016/j.clay.2013.12.013 https://doi.org/10.1016/j.clay.2013.12.013 | ||
| Appears in Collections |
This study examines the influence of layer charge and smectite content on the rheological properties of mixedbentonite–palygorskite suspensions. Eight bentonite samples containing smectite with layer charge rangingbetween 0.38 and 0.54 e/huc were used to prepare 5% w/v mixed palygorskite–bentonite aqueous suspensionat pH 7. The influence of smectite on the apparent viscosity and yield point of palygorskite suspensions dependson the proportion of the smectite in themixture and the layer charge and charge localization of the smectite. Theinteraction between the two endmember clayminerals ismaximumat low percentage (10 to 20%) of bentonitein the mixture. Low charge and high charge smectite tended to improve and deteriorate, respectively, the yieldpoint and apparent viscosity of the suspension. This behaviour seemed to be related to the influence of layercharge of smectite on the degree of delamination and the thickness of smectite quasicrystals,which consequentlydetermine the number of particles involved in the interaction and the strength of particle–particle linkages.
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