| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 6715155 | Construction and Building Materials | 2018 | 13 Pages |
Abstract
In this study the effect of small amount (1â¯wt%) of organically modified montmorillonite (OMT) on the hydration peculiarities, strength and water sorptivity of cement pastes was investigated. Three types of OMT with cation exchange degrees 0.6, 0.8 and 1.0 were selected for cement substitution in the paste. Cement hydration was analysed by XRD/Rietveld method, SEM/EDS and thermogravimetric analysis. OMT of lower cation exchange degree (0.6) displayed pozzolanic behaviour after 14â¯days while the activity of OMT with higher cation exchange degree (0.8-1.0) was observed only after 28â¯days. The use of OMT with higher cation exchange degree resulted in the extra formation of aluminohydrates in cement pastes. The capillary sorption of the samples decreased with the increase of the cation exchange degree of OMT.
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Authors
JÅ«ratÄ ÄÄsnienÄ, ArÅ«nas BaltuÅ¡nikas, Irena LukoÅ¡iÅ«tÄ, Kristina BrinkienÄ, Regina KalpokaitÄ-DiÄkuvienÄ,