Autogenous healing of early-age cracks in cementitious materials by superabsorbent polymers

Geuntae Hong, Chiwon Song, Seongcheol Choi

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


The effect of superabsorbent polymers (SAPs) on autogenous crack healing in cementitious materials with early-age cracking was investigated. SAP-containing samples exposed to wet/dry cycles showed better autogenous healing than those only exposed to wet conditions, as determined by water flow and compressive strength recovery tests. The water flow rates through cracks (380 ± 40 μm) in cement paste and cement mortar containing 1.0% SAP decreased by around 97.1-100% and 79.7-90.7%, respectively, after 14 cycles of healing compared to 1 cycle. Although the initial compressive strength decreased with SAP addition, it recovered somewhat after a 28-d healing period. Microscopy and spectroscopy results identified CaCO3 and/or calcium silicate hydrate (CSH) as the main healing products.

Original languageEnglish
Article number690
Issue number3
StatePublished - 1 Feb 2020


  • Autogenous healing
  • Compressive strength
  • Flow rate
  • Superabsorbent polymer (SAP)
  • Underwater
  • Wet/dry cycle


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