The W/B ratio governed on the capillary index results, while the
swelling effect of SAP particle played an important role in the
reduction of the results. Although 0.90SAP-containing mortars
demanded highest dosage of water, the capillary index remained
below the level of the respective SAP-free mortars.
The moisture buffering capacity of SAP-containing mortars
showed superior capacity to control the humidity changes, being
classified as good according to the Nordtest method, while REF
reached just moderate.
The flexural strength results emphasized the importance of the
correct correlation between the dosage of SAP particles and W/B
ratio to maintain invariable the performance of samples, regarding
the SAP-free mortars.