| 摘要 |
<p>The possible emission of hydrogen sulphide from building materials incorporating a sulphide-containing constituent is suppressed by applying a surface covering composition containing gypsum plaster and a metal compound e.g. zinc oxide capable of reacting with hydrogen sulphide to form a stable sulphide, and allowing such compound to react with hydrogen sulphide evolved by a sulphur containing component contained in the structure or in the composition itself. The sulphide containing constituent may be blast-furnace slag, or pozzolan.</p> |
