Influence of superabsorbent polymers on hydration of cement pastes with low water-to-binder ratio
- Journal Article
Rights / licenseIn Copyright - Non-Commercial Use Permitted
Internal curing with superabsorbent polymers (SAP) is a method for promoting hydration of cement and limiting self-desiccation, shrinkage and cracking in high-performance, and ultra high-performance concrete with low water-to-binder ratio. SAP are introduced in the dry state during mixing and form water-filled inclusions by absorbing pore solution. The absorbed solution is later released to the cement paste during hydration of the cement. In this paper, cement pastes with low water-to-binder ratios incorporating superplasticizer and different dosages of SAP and corresponding additional water were prepared. Reference cement pastes without SAP but with the same amount of water and superplasticizer were also mixed. Isothermal calorimetry was used to measure hydration heat flow. Water entrainment by means of SAP increased the degree of hydration at later hydration times in a manner similar to increasing the water-to-binder ratio. Addition of SAP also delayed the main calorimetric hydration peak compared to the reference pastes, however, in a less prominent manner than the increase in water-to-cement ratio. Show more
Journal / seriesJournal of Thermal Analysis and Calorimetry
Pages / Article No.
SubjectSuperabsorbent polymers (SAP); Cement hydration; Isothermal calorimetry; Portland cement; Low water-to-binder ratio
NotesIt was possible to publish this article open access thanks to a Swiss National Licence with the publisher.
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