[1349] COMPARISON OF ABSORPTION CAPACITY OF SUPERABSORBENT POLYMERS MEASURED BY DIFFERENT METHODS
Keywords:superabsorbent polymer, absorption capacity, de-ionized water, cement slurry filtrate, modified tea bag method, filtration method, plastic viscosity, interparticle liquid
It is important to determine absorption capacity of superabsorbent polymer (SAP) by a proper method. In this study, the test results of the modified tea bag method are compared to those of the filtration method. It is suggested that the results of tea bag method is prone to be affected by agglomeration of SAP particles, which lead to insufficient swollen SAP. As a result, the absorption capacity in the tea bag method is smaller than that by the filtration method. The large increase in absorption capacity during the test period seems to result from the retention of interparticle liquid in the tea bag method.