Abstract
This study aims to study the microstructural properties of polymer-modified self-healing concrete using scanning electron microscopy (SEM) and X-ray diffraction (XRD) tests. Until recent years, the mechanical properties of concrete have been studied extensively and these properties alone could not help to examine the microstructure of cement paste. Thus, SEM and XRD were employed to study the microstructural changes in polymer-modified concrete (PMC) in the presence of super-absorbent polymer (SAP) and control concrete (CC) before self-healing. The result of this analysis revealed the presence of unhydrated cement particles trapped within the film made by SAP in PMC when compared to CC. The compressive strength of PMC after 28 days of self-healing was slightly more than that of CC, showing that the SAP has speeded the rate of hydration during the self-healing phase. This improvement in the value could be due to the active participation of unhydrated cement particles from PMC.
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Acknowledgements
The authors would like to thank Sathyabama Institute of Science and Technology for providing facilities to carry out the casting, curing and performing compression tests. The authors would also like to thank the Department of Chemistry, Indian Institute of Technology, Madras for helping to carry out the XRD analysis and Nanotechnology Research Centre, SRM Institute of Science and Technology, for carrying out the SEM analysis.
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Manoj Kumaar, C., Mageswari, M. (2022). Microstructural Properties of Polymer-Modified Self-Healing Concrete Using Scanning Electron Microscopy and X-ray Diffraction. In: Satyanarayanan, K.S., Seo, HJ., Gopalakrishnan, N. (eds) Sustainable Construction Materials. Lecture Notes in Civil Engineering, vol 194. Springer, Singapore. https://doi.org/10.1007/978-981-16-6403-8_24
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DOI: https://doi.org/10.1007/978-981-16-6403-8_24
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