Abstract
Synthetic superabsorbent polymers (SAPs) are used in concrete for various applications. However, the addition of SAPs may lead to a significant decrease in mortar strength. In order to overcome this bottleneck, the present work focuses on the application of biopolymers as SAPs, more specifically polysaccharides including both uncross-linked sodium alginate as well as physically cross-linked calcium alginate. Interestingly, results indicate no or a limited (i.e. <15%) reduction in strength upon introducing 1% relative to cement mass. Alginate can therefore be considered a promising material, not only for internal curing but even when high SAP amounts are required.
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