Táto internetová stránka používa technológiu cookies. Bližšie informácie o súboroch cookies nájdete v sekcii webstránky Cookies. Je Vaším právom neudeliť súhlas s používaním súborov cookies alebo ich používanie zablokovať. V takom prípade sa môže stať, že bude pre Vás obmedzená alebo vylúčená úplná funkcionalita niektorých častí prehliadanej webovej stránky.
Bentonit is a clayey earth whose substantial component (45-55 %) is montmorillonite (hydrated alumina silicate of alkalis and alkaline earth), which is the base for its outstanding rheological and sorption quatilies. The colour of bentonite is very variable - from white, through yellow, brownish to red or dark grey depending on present of iron oxides or other substances.
Before use, bentonite is processed by drying, milling or physically and chemically activating. Processed bentonite finds a wide use in metallurgy, building industry, electrical engineering, agriculture and animal breeding, food industry or pharmaceutical industry.
To download:
MSDS
Bentiónite in deposit of Lastovce is a pyroclastic bentonite. This is a product of decomposition of tufaceous ash-materials with the montmorillonite-content of about 45-55 %.
| Loss by anneal | 6,40 |
| SiO2 | 70,25 |
| Al2O3 | 15,8 |
| Fe2O3 | max. 3,5 |
| TiO2 | 0,25 |
| CaO | 3,95 |
| MgO | 0,9 |
| MnO | traces |
| K2O | 0,5 |
| Na2O | 0,45 |
Bentonite Lastovce is dispatched as unprocessed, homogenised in bulk directly from the stockpile near to the quarry.
Expedition by truck
| Grain size in weight % | Mineralogical content | |
| Grains over 7,0 mm | 4% | Substantial comp.: |
| Grains 2,0-7,0 mm | 4% | Quartz, tuff and rhyolite |
| Grains 0,09-2,0 mm | 10% | Secondary comp.: |
| Grains 0,063-0,09 mm | 2% | Limestone substances |
| Grains under 0,09 mm | 80% |
Substantial comp.: Montmorillonite, kristobalite |
Additional technical properties:
| Cation-exchange capacity in mol/kg | 0,450 (±0,05) |
| Tests of rheological properties: | |
| Shearing strength (Pa) after 10 sec.–10 min | 1,8/2,8 – 5,0/8,5 |
| Yield point Pa | 4,6/6,4 |
| Plastic - aparent viscosity | 0,013/0,02 – 0,024/0,04 |
| Atterberger limits (natural/natrified) | |
| Yield limit Wt(%) | 131/507 |
| Plasticity bound Wt (%) | 32/62 |
| Index of plasticity Ip | 99/445 |
The mentioned information is to be considered as informative.
