Recent progress in superabsorbent polymers for concrete

Scientific interest on superabsorbent polymers (SAPs) in conjunction with cement-based building materials has widened from mostly engineering aspects towards polymer physico-chemical topics over the past years. Here, we focus on the relationships between absorptivity in terms of absorption/desorption kinetics and retention of the absorbed liquid and the polymer physico-chemical principles. Based on such understanding, use and effects of SAPs in concrete are outlined and explained mechanistically. They comprise modifying rheology, internal curing to mitigate plastic and autogenous shrinkage, self-sealing and self-healing of cracks, and improvement of freezing-and-thawing durability. Recent topics such as reduction of fire spalling and enhanced growth of plant species on green wall facades are also explored for advancing the applications of SAPs in cement-based materials.

Automated summary

Scientific interest in superabsorbent polymers (SAPs) used in conjunction with cement-based building materials has shifted towards polymer physico-chemical topics, focusing on absorption/desorption kinetics, retention of absorbed liquid, and related principles. The effects of SAPs in concrete include modifying rheology, internal curing, self-sealing and self-healing of cracks, and enhancing freezing-and-thawing durability. Recent research also explores reducing fire spalling and promoting plant growth on green wall facades using SAPs.