| 摘要 |
<p>Plaster consists substantially of: 15-50 vol.% plater of Paris; 40-70 vol.% of a porous silicate material with a bulk weight below 0.6; 1-20 vol.% calcium hydroxide; 1-15 vol.% asbestos-cement mixture. The porous silicate material is granulated, foamed magnesium silicate slag or swelled light additive material of a density below 0.4.</p> |
