| Title |
Effective Absorption Capacity of Highly Absorptive Materials using Isothermal Calorimetry, Considering the Effect of Specific Surface Area |
| DOI |
https://doi.org/10.5659/JAIK_SC.2018.34.2.49 |
| Keywords |
Highly absorptive materials ; Effective absorption capacity ; Isothermal calorimetry ; Micropores ; Activated carbon fiber. |
| Abstract |
The use of highly absorptive materials in cement-based materials is increasing for internal curing purpose. However, calculation of correct absorption capacity of such materials is not easy, which leads to change in the effective water-to-cement ratio of cement paste by either absorbing or releasing water. In this study, effective absorption capacity of a highly absorptive material was found using isothermal calorimetry. Moreover, the effect of specific surface area was investigated. It was found that the method was capable of finding effective water absorption capacity of activated carbon fiber. For the activated carbon fiber used in this research, the effect of specific surface area was negligible because the high BET surface area was due to micropores less than 1nm, which does not affect the rate of hydration curve. Thus, the effective absorption capacity of such materials can be found successfully using this method. |