Das, Swapan K and Mitra, A and Daspoddar, P K (1996) Thermal analysis of hydrated calcium aluminates. Journal of Thermal Analysis, 47 (3). pp. 765-774.
Full text not available from this repository.
Abstract
Differential scanning calorimeter (DSC) has been used to study the dehydration characteristics of hydrated calcium aluminates such as CA, CA(2) and C(12)A(7) where C and A stand for CaO and Al2O3 respectively. Dehydration of CAH(10) and C(2)AH(8) (where H=H2O) occur at 160-180 degrees C and 200-280 degrees C respectively. These two phases are unstable and ultimately get transformed to AH(3) and C(3)AH(6). Dehydration of AH(3) and C(3)AH(6) occur between 290 and 350 degrees C and overlap at lower scanning rate. The activation energy for dehydration of the stable AH(3) and C(2)AH(6) phases has been found to be 107.16 and 35.58 kJ mol(-1) respectively. The compressive strength of the hydrated calcium aluminates has been determined. The result shows that in the case of CA, almost 90% of ultimate strength has been attained in 1 day whereas in CA(2), ultimate strength has been attained in 14 days and in C(12)A(7) in 1 day. DSC results have been correlated with the rate of strength developments.
| Item Type: | Article |
|---|---|
| Official URL/DOI: | http://www.nmlindia.org |
| Uncontrolled Keywords: | Hydrated calcium aluminates |
| Divisions: | Material Science and Technology |
| ID Code: | 1041 |
| Deposited By: | Sahu A K |
| Deposited On: | 15 Jun 2010 12:36 |
| Last Modified: | 14 Dec 2011 14:37 |
| Related URLs: |
Repository Staff Only: item control page
