par Snoeck, Didier 
;De Belie, Nele
Référence Developments in the Built Environment, 100712
Publication Publié, 2025-07-08
;De Belie, NeleRéférence Developments in the Built Environment, 100712
Publication Publié, 2025-07-08
Article révisé par les pairs
| Résumé : | To promote autogenous healing, a new approach involving the use of a crack repair stick is proposed. The sticks contain mixtures based on cement, crystalline admixtures (CA), expansive agents (EA) and superabsorbent polymers (SAP) and are applied to a cracked concrete surface. A wet/dry curing period was imposed, and crack sealing efficiency was assessed using water permeability and healing by means of repeated tensile tests. The quantity of admixtures was varied and the practical application of the crack repair sticks was assessed. A regain in impermeability under high-pressure conditions was found, showing a reduced water flow by up to a factor of 102. Mechanical properties also partially recovered, even up to 100 %, due to autogenous healing. CA with or without EA proved to be the most promising option. The admixtures react with hydration products and moisture in the crack to form additional crystals, physically sealing the formed crack. |
