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Abstract
Superabsorbent Polymers (SAP) have been recently subject of investigation as smart admixtures for cement-based materials. The properties of these polymers enable their use for internal curing, increasing freeze/thaw resistance, boosting autogenous self-healing and providing a crack self-sealing effect in cementitious composites. Except for the earliest application, the functioning of these beneficial effects invloves the absorption by the polymers of ingress water in the hardened cementitious matrix and later release, as well as their capacity to complete multiple absorption/desorption cycles. In this work, the absorption of water in mortar with superabsorbent polymers is monitored during the first 60 min of absorption through micro-CT. The experimental series included the presence of cracks. The registration and differentiation of sub-minute (18 s) scans enabled the individuation of bulk water content distribution in the mortar with a resolution of 55 mu m. The swollen volume of SAP could also be quantified and studied in time. The results point out that although embedded SAP absorb water from the matrix, this absorption is slow and reduced with respect to water absorption during mixing for the used SAP. Same effect is observed for SAP in the cracks.
Keywords
SAP, Mortar, X-ray micro computed tomography, Concrete durability

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MLA
Romero Rodriguez, Claudia, et al. “X-Ray Micro Tomography of Water Absorption by Superabsorbent Polymers in Mortar.” 3rd International Conference on the Application of Superabsorbent Polymers (SAP) and Other New Admixtures Towards Smart Concrete, edited by W Boshoff et al., vol. 24, Springer, 2020, pp. 29–37, doi:10.1007/978-3-030-33342-3_4.
APA
Romero Rodriguez, C., Deprez, M., de Mendonca Filho, F. F., Van Offenwert, S., Cnudde, V., Schlangen, E., & Savija, B. (2020). X-ray micro tomography of water absorption by superabsorbent polymers in mortar. In W. Boshoff, R. Combrinck, V. Mechtcherine, & M. Wyrzykowski (Eds.), 3rd International Conference on the Application of Superabsorbent Polymers (SAP) and Other New Admixtures Towards Smart Concrete (Vol. 24, pp. 29–37). Dordrecht, Netherlands: Springer. https://doi.org/10.1007/978-3-030-33342-3_4
Chicago author-date
Romero Rodriguez, Claudia, Maxim Deprez, Fernando F. de Mendonca Filho, Stefanie Van Offenwert, Veerle Cnudde, Erik Schlangen, and Branko Savija. 2020. “X-Ray Micro Tomography of Water Absorption by Superabsorbent Polymers in Mortar.” In 3rd International Conference on the Application of Superabsorbent Polymers (SAP) and Other New Admixtures Towards Smart Concrete, edited by W Boshoff, R Combrinck, V Mechtcherine, and M Wyrzykowski, 24:29–37. Dordrecht, Netherlands: Springer. https://doi.org/10.1007/978-3-030-33342-3_4.
Chicago author-date (all authors)
Romero Rodriguez, Claudia, Maxim Deprez, Fernando F. de Mendonca Filho, Stefanie Van Offenwert, Veerle Cnudde, Erik Schlangen, and Branko Savija. 2020. “X-Ray Micro Tomography of Water Absorption by Superabsorbent Polymers in Mortar.” In 3rd International Conference on the Application of Superabsorbent Polymers (SAP) and Other New Admixtures Towards Smart Concrete, ed by. W Boshoff, R Combrinck, V Mechtcherine, and M Wyrzykowski, 24:29–37. Dordrecht, Netherlands: Springer. doi:10.1007/978-3-030-33342-3_4.
Vancouver
1.
Romero Rodriguez C, Deprez M, de Mendonca Filho FF, Van Offenwert S, Cnudde V, Schlangen E, et al. X-ray micro tomography of water absorption by superabsorbent polymers in mortar. In: Boshoff W, Combrinck R, Mechtcherine V, Wyrzykowski M, editors. 3rd International Conference on the Application of Superabsorbent Polymers (SAP) and Other New Admixtures Towards Smart Concrete. Dordrecht, Netherlands: Springer; 2020. p. 29–37.
IEEE
[1]
C. Romero Rodriguez et al., “X-ray micro tomography of water absorption by superabsorbent polymers in mortar,” in 3rd International Conference on the Application of Superabsorbent Polymers (SAP) and Other New Admixtures Towards Smart Concrete, Skukuza, South Africa, 2020, vol. 24, pp. 29–37.
@inproceedings{8655668,
  abstract     = {{Superabsorbent Polymers (SAP) have been recently subject of investigation as smart admixtures for cement-based materials. The properties of these polymers enable their use for internal curing, increasing freeze/thaw resistance, boosting autogenous self-healing and providing a crack self-sealing effect in cementitious composites. Except for the earliest application, the functioning of these beneficial effects invloves the absorption by the polymers of ingress water in the hardened cementitious matrix and later release, as well as their capacity to complete multiple absorption/desorption cycles. In this work, the absorption of water in mortar with superabsorbent polymers is monitored during the first 60 min of absorption through micro-CT. The experimental series included the presence of cracks. The registration and differentiation of sub-minute (18 s) scans enabled the individuation of bulk water content distribution in the mortar with a resolution of 55 mu m. The swollen volume of SAP could also be quantified and studied in time. The results point out that although embedded SAP absorb water from the matrix, this absorption is slow and reduced with respect to water absorption during mixing for the used SAP. Same effect is observed for SAP in the cracks.}},
  author       = {{Romero Rodriguez, Claudia and Deprez, Maxim and de Mendonca Filho, Fernando F. and Van Offenwert, Stefanie and Cnudde, Veerle and Schlangen, Erik and Savija, Branko}},
  booktitle    = {{3rd International Conference on the Application of Superabsorbent Polymers (SAP) and Other New Admixtures Towards Smart Concrete}},
  editor       = {{Boshoff, W and Combrinck, R and Mechtcherine, V and Wyrzykowski, M}},
  isbn         = {{9783030333416}},
  issn         = {{2211-0844}},
  keywords     = {{SAP,Mortar,X-ray micro computed tomography,Concrete durability}},
  language     = {{eng}},
  location     = {{Skukuza, South Africa}},
  pages        = {{29--37}},
  publisher    = {{Springer}},
  title        = {{X-ray micro tomography of water absorption by superabsorbent polymers in mortar}},
  url          = {{http://dx.doi.org/10.1007/978-3-030-33342-3_4}},
  volume       = {{24}},
  year         = {{2020}},
}

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