Hydrous calcium silicate

Calcium Silicate. Composed principally of hydrous calcium silicate, usually conlaining reinforcing libers. 

Develii]ied in the eurly I lHOs. tohcrinoriies have selectivity properties intermediate between those of clay minerals and zeolites. They have been considered in catalysis and nuclear and hazardous waste disposal. Tobermorilc. Ca Si H () s 4HiO. occurs naturally as a hydrous calcium silicate in calc-silicate rock. Tobermorilex have layer structures similar to those of 2 1 clay minerals, but the structure varies with the chemical composition as well as with Ihe nature of their synthesis. They have heen synthesized from a number of starting materials. 

Hydrous calcium silicate is produced by hydrothermal reaction of diatomaceous earth, hydrated lime, and water. Figure 2.31 gives schematic representation of the process. The product is a material which can absorb 5.5 times ofits weight of water. 

Celite Corporation 295 The West Mall Etobicoke, ON M9C 427, Canada tel 1 416 626 8175 fax 1 416 626 8235 diatomaceous earth hydrous calcium silicate 80 96... 

Synthetic Hydrous Calcium Silicate, Ca/Si Molar Ratio of 0.66... 

A dry, moderately flexible glue, patented by M. Konigsberg, contains 8-20% glycerine but remains free-flowing indefinitely. The method utilizes the absorptive properties of synthetic alkaline earth metal silicates such as hydrous calcium silicates (e.g., Micro-cel, Johns-Man-ville) and other specially prepared synthetic silicas. It has met with considerable success in the bookbinding industry. 

Hollow glass beads 0.12-1.1 Hydrous calcium silicate 2.6... 

Kalousek, G. L. 1957. Crystal chemistry of hydrous calcium silicates I Substitution of aluminium in lattice of tobermorite. Journal of the American Ceramic Society, 40(3), 74-80. 

CSH, tobermorite, xonotlite and related materials are being widely utilized in recent years. It is produced on autoclaved lightweight concrete, autoclaved concrete, sand-lime blocks, hydrous calcium silicate he at-insu1 ation materials, hydration products of cement and other building or construction materials. 

Product COSAN JTA-20 is a highly functional, soluble, phenyl-mercury acetate which has been deposited on an inert, synthetic, hydrous calcium silicate to produce a free-flowing, relatively non-dusting powder which is simple to incorporate into dry formulations. COSAN JTA-20 contains 20% phenylmercury acetate as the active ingredient equivalent to 12% mercury expressed as metal. 

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