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X-Ray Micro Tomography of Water Absorption by Superabsorbent Polymers in Mortar

  • Claudia Romero RodriguezEmail author
  • Maxim Deprez
  • Fernando F. de Mendonca Filho
  • Stefanie van Offenwert
  • Veerle Cnudde
  • Erik Schlangen
  • Branko Šavija
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 24)

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 μm. 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 

Notes

Acknowledgments

C. Romero Rodriguez acknowledges the financial support from the Construction Technology Research Program funded by the Ministry of Land, Infrastructure and Transport of the Korean Government under the grant 17SCIP-B103706-03 and also the financial aid of the Cost Action 15202 under the Short Scientific Mission with reference number 39002, in the realization of the experiments. The authors gratefully acknowledge UGCT for the use of micro-CT scanner facilities and the Ghent University Special Research Fund (BOF-UGent) for the financial support to the Centre of Expertise UGCT (BOF.EXP.2017.007). FWO is acknowledged for funding Maxim Deprez (project 3.G.0041.15). The authors wish to thank Dr. Didier Snoeck for providing a generous quantity of SAP F for the experiments and to Iván Josipovic and Dr. Tim de Kock for their highly appreciated feedback.

References

  1. Arganda-Carreras, I., Kaynig, V., Rueden, C., Eliceiri, K.W., Schindelin, J., Cardona, A., Sebastian Seung, H.: Trainable Weka Segmentation: a machine learning tool for microscopy pixel classification. Bioinformatics 33(15), 2424–2426 (2017)CrossRefGoogle Scholar
  2. Beushausen, H., Gillmer, M., Alexander, M.: The influence of superabsorbent polymers on strength and durability properties of blended cement mortars. Cement Concr. Compos. 52, 73–80 (2014)CrossRefGoogle Scholar
  3. Boone, M., De Kock, T., Masschaele, B., De Schryver, T., Van Hoorebeke, L., Cnudde, V.: 4D mapping of fluid distribution in porous sedimentary rocks using X-ray micro-CT differential imaging. In: IMA 2014: Proceedings of the 21st General Meeting of the International Mineralogical Association, pp. 292–292 (2014)Google Scholar
  4. Cui, D., Sun, W., Wang, Q., Gu, C.: Use of tomography to estimate the representative elementary volume in mortars stained with potassium iodide. Mater. Des. 147, 80–91 (2018).  https://doi.org/10.1016/j.matdes.2018.03.029CrossRefGoogle Scholar
  5. Cnudde, V., Boone, M.: High-resolution X-ray computed tomography in geosciences: a review of the current technology and applications. Earth Sci. Rev. 123, 1–17 (2013)CrossRefGoogle Scholar
  6. Dierick, M., Van Loo, D., Masschaele, B., Van den Bulcke, J., Van Acker, J., Cnudde, V., Van Hoorebeke, L.: Recent micro-CT scanner developments at UGCT. Nucl. Instrum. Methods Phys. Res. Sect. B 324, 35–40 (2014)CrossRefGoogle Scholar
  7. Geiker, M.R., Bentz, D.P., Jensen, O.M.: Mitigating autogenous shrinkage by internal curing, pp. 143–154. ACI Special Publications (2004)Google Scholar
  8. Jensen, O.M., Hansen, P.F.: Water-entrained cement-based materials II. Experimental observations. Cem. Concr. Res. 32(6), 973–978 (2002)CrossRefGoogle Scholar
  9. Lee, H., Wong, H.S., Buenfeld, N.R.: Potential of superabsorbent polymer for self-sealing cracks in concrete. Adv. Appl. Ceram. 109(5) (2010).  https://doi.org/10.1179/174367609X459559CrossRefGoogle Scholar
  10. Lee, H., Wong, H., Buenfeld, N.: Effect of alkalinity and calcium concentration of pore solution on the swelling and ionic exchange of superabsorbent polymers in cement paste. Cement Concr. Compos. 88, 150–164 (2018).  https://doi.org/10.1016/j.cemconcomp.2018.02.005CrossRefGoogle Scholar
  11. Mechtcherine, V., Schröfl, C., Wyrzykowski, M., Gorges, M., Lura, P., Cusson, D., Margeson, J., De Belie, N., Snoeck, D., Ichimiya, K., Igarashi, S.I., Weiss, J.: Effect of superabsorbent polymers (SAP) on the freeze–thaw resistance of concrete: results of a RILEM interlaboratory study. Mater. Struc. 50(1) (2017).  https://doi.org/10.1617/s11527-016-0868-7
  12. Pelto, J., Leivo, M., Gruyaert, E., Debbaut, B., Snoeck, D., De Belie, N.: Application of encapsulated superabsorbent polymers in cementitious materials for stimulated autogenous healing. Smart Mater. Struct. 26(10), 105043 (2017).  https://doi.org/10.1088/1361-665X/aa8497CrossRefGoogle Scholar
  13. Reinhardt, H.W., Assmann, A.: Enhanced durability of concrete by superabsorbent polymers. In: Brittle Matrix Composites, vol. 9, pp. 291–300. Elsevier (2009).  https://doi.org/10.1533/9781845697754.291CrossRefGoogle Scholar
  14. Rodríguez, C.R., Figueiredo, S.C., Schlangen, E., Snoeck, D.: Modeling water absorption in cement-based composites with SAP additions. In: Computational Modelling of Concrete Structures: Proceedings of the Conference on Computational Modelling of Concrete and Concrete Structures (EURO-C 2018), Bad Hofgastein, Austria, February 26-March 1 2018, p. 295. CRC Press (2018)Google Scholar
  15. Rodríguez, C.R., Figueiredo, S.C., Snoeck, D., Deprez, M., Schlangen, E., Šavija, B.: Numerical investigation of crack self-sealing in cement-based composites with superabsorbent polymers (2019, Manuscript submitted for publication)CrossRefGoogle Scholar
  16. Snoeck, D., Dewanckele, J., Cnudde, V., De Belie, N.: X-ray computed microtomography to study autogenous healing of cementitious materials promoted by superabsorbent polymers. Cement Concr. Compos. 65, 83–93 (2016).  https://doi.org/10.1016/j.cemconcomp.2015.10.016CrossRefGoogle Scholar
  17. Vlassenbroeck, J., Masschaele, B., Cnudde, V., Dierick, M., Pieters, K., Van Hoorebeke, L., Jacobs, P.: Advances in X-ray Tomography for Geomaterials. Presented at the 2nd International Workshop on the Application of X-ray CT for Geomaterials, pp. 167–173 (2006)Google Scholar

Copyright information

© RILEM 2020

Authors and Affiliations

  • Claudia Romero Rodriguez
    • 1
    Email author
  • Maxim Deprez
    • 2
  • Fernando F. de Mendonca Filho
    • 1
  • Stefanie van Offenwert
    • 2
  • Veerle Cnudde
    • 2
    • 3
  • Erik Schlangen
    • 1
  • Branko Šavija
    • 1
  1. 1.Microlab, Department of 3MD, Faculty of Civil Engineering and GeosciencesDelft University of TechnologyDelftThe Netherlands
  2. 2.PProGRess/UGCT, Geology Department, Faculty of SciencesGhent UniversityGhentBelgium
  3. 3.Department of Earth Sciences, Faculty of GeosciencesUtrecht UniversityUtrechtThe Netherlands

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