In this work, a numerical model is presented to predict the self-sealing effect provided by superabsorbent polymers (SAP) admixtures in mortar. Firstly, the use of a law of absorption kinetics for SAP embedded in a cementitious matrix was validated with experimental results available in literature. Secondly, two extreme strategies are considered for the swelling of SAP in the crack regarding the variation in its deformation capacity under constraint. The results show the appropriateness of the SAP absorption law and explain the mechanisms of water absorption of mortar with such admixtures. Furthermore, the influence of the deformation capacity of SAP on the water penetration in cracks is studied parametrically.
|Title of host publication||Proceedings of the Symposium on Concrete Modelling|
|Subtitle of host publication||CONMOD2018 27-30 August 2018 – Delft, Netherlands|
|Editors||Erik Schlangen, Geert de Schutter, Branko Šavija, Hongzhi Zhang, Claudia Romero Rodriguez|
|Publication status||Published - 2018|
|Event||Symposium on Concrete Modelling - Delft, Netherlands|
Duration: 27 Aug 2018 → 30 Aug 2018
|Conference||Symposium on Concrete Modelling|
|Period||27/08/18 → 30/08/18|
Romero Rodriguez, C., Chaves Figueiredo, S., Snoeck, D., Šavija, B., & Schlangen, E. (2018). Modelling strategies for the study of crack self-sealing in mortar with superabsorbent polymers. In E. Schlangen, G. de Schutter, B. Šavija, H. Zhang, & C. Romero Rodriguez (Eds.), Proceedings of the Symposium on Concrete Modelling: CONMOD2018 27-30 August 2018 – Delft, Netherlands (Vol. PRO 127, pp. 333-341). (Rilem proceedings; No. PRO 127). Rilem.