The hydration of calcium dialuminate and its mixtures containing slag

✍ Scribed by B. Singh; A.J. Majumdar

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 358 KB
• Volume: 22
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(92)90032-q

✦ Synopsis

In a paste CA2 hydrates very slowly at 20oC but the reaction is more rapid at 40°C. At both temperatures the products of hydration comprise C2AHs, gibbsite and alumina gel after 7 days.

For mixtures of CA2 + CA the initial hydration at 200C is dominated by CA. In the presence of ground granulated blastfurnace slag CA2 or a mixture of CA2 + CA will form str~tlingite on hydration at 40°C within 3 days.

Slag addition reduces the amount of heat evolved during the first 24 hours of hydration at both 20 ° and 40°C.