The effect of mechanical treatment on the structure of montmorillonite

Dry grinding of Ca and octadecyltrimethylammonium montmorillonite

“…The organic cations in the clay mineral galleries may markedly affect the stability of the mineral to mechanical treatment. Organoclays may be less or more resistant toward mechanical treatment than natural clays independent of the character of the organic cations [32].…”

Development of building material utilizing a low pozzolanic activity mineral

“…The DTG curves of PS shows a well-defined strong symmetric double peak near 96 and 163°C, characteristic for montmorillonites [27,35]. It reflects the release if water adsorbed on the particle surfaces and of water molecules coordinating Ca 2+ or Na + cations, respectively.…”

“…8a-d. For PS samples, it shows the main adsorption bands as follows: 468, 522, 584, 645, 713, 778, 875, 1035, 1421, 1635, 3421 and 3620 cm À1 . The bands due to free (or weakly hydrogen-bonded water molecules to the surface oxygen of tetrahedral sheet) water molecules, water-water hydrogen bond (M n+ -O-H-O-H-) and water bending modes are observed near 3622, 3421 and 1635 cm À1 , respectively [27,28]. The peaks at 1421, 875 and 713 cm À1 are attributed to anti-symmetric stretching and out-ofplane bending modes of CO 3 2À ions [29].…”

Application of Bio-Modified Montmorillonite Clay to Enhance Asphalt Oxidation Resistance

“…Two peaks at 3620 and 3428 cm −1 are attributed to the stretching of -OH, which is the result of the presence of water in nanoclay montmorillonite. The peak at 1030 cm −1 is resulted from the stretching vibrations of Si-O and the peaks at 520 and 470 cm −1 are resulted from the bending absorptions of Si-O and Al-O bonds in the MMT structure (Hrachova et al, 2007;Su et al, 2008). In the spectra of MMT/BB (5) and MMT/BB (25), new peaks appeared at 2925 and 2851 cm −1…”