TABLE 1.
Joint system cement ingredients
| Ingredient | Function | Mass used in reformulation (grams) | % by weight | Supplier |
|---|---|---|---|---|
| Limestonea | Filler | 3640 | 73 | Science Stuff |
| Micab | Anti-cracking agent | 800 | 16 | Zemex Industrial Minerals |
| Casein | Adhesive | 225 | 4.5 | Science Laboratories; Sigma Aldrich |
| Borax | Alkaline source | 7.5 | 0.15 | Van Dyke Supply Co. |
| Soda ash | Alkaline source | 20 | 0.4 | Jacquard |
| Zinc oxide | Viscosity stablizer | 5 | 0.1 | Science Laboratories |
| Natrosol | Water retention | 15 | 0.3 | Aqualon (Hercules) |
| Alkanol XC (Petro AD) | Wetting agent | 5 | 0.1 | Sigma Aldrich/DuPont |
| Vancide 51Zc | Fungicide | — | — | — |
| Dimethyldithiocarbamate, zinc salt | Substitute for Vancide 51Z | 1.875 | 0.038 | Sigma Aldrich |
| Nalco 71-D5c | Anti-foaming agent | — | — | — |
| Chrysotile 7RF9c | Bulk | — | — | — |
| Chrysotile 7RF3 | Substitute for 7RF9 | 275 | 5.5 | Johns Manville |
Note.
a
100% calcium carbonate natural chalk (CAS# 471-34-1).
b
Muscovite mica.
c
Ingredient substituted or eliminated – see text.