| 摘要 |
<p>A composition based on foamed perlite and magnesia cement for forming constructional thermo insulating elements and a method of making thereof.
The composition comprises additionally surface active substances such as methylcellulose, bentonite as swelling agent and H 3 PO 4 , NaH 2 PO 4 .2H 2 O and NH 4 H 2 PO 4 .
The made constructional articles have an even finely porous structure and can be easily machined or processed; they resist against passive flame and biologic agents, have antibacteric properties, are free of bad odours and do not emit environmental noxious substances.</p> |
