Print Email Facebook Twitter Sodium silicate/polyurethane microcapsules synthesized for enhancing self-healing ability of cementitious materials Title Sodium silicate/polyurethane microcapsules synthesized for enhancing self-healing ability of cementitious materials: Optimization of stirring speeds and evaluation of self-healing efficiency Author Beglarigale, Ahsanollah (Istanbul Okan University) Eyice, Doğa (Dokuz Eylul University) Seki, Yoldaş (Dokuz Eylul University) Yalçinkaya, Ç. (TU Delft Materials and Environment; Dokuz Eylul University) Copuroglu, Oguzhan (TU Delft Materials and Environment) Yazici, Halit (Dokuz Eylul University) Date 2021 Abstract In this study, stirring speeds during the synthesizing process of the sodium silicate/polyurethane microcapsules were optimized. The yield values of microcapsules at different stirring rates were evaluated. Based on the yield values and shape of microcapsules, optimized microcapsules were obtained. The measurements of the shell thickness of microcapsules were performed on the fractured microcapsules by using scanning electron microscopy. The optimized microcapsules were further characterized by means of optical microscopy and nanoindentation. Load vs. displacement and modulus of elasticity vs. displacement characteristics of the microcapsules were obtained. The average modulus of elasticity was found to be 633 MPa. The self-healing efficiency of the optimized microcapsules was evaluated by means of compressive strength tests. The incorporation of microcapsules reduced the compressive strength of fiber-reinforced mortar by 12–22%. However, it was observed that the microcapsules enhanced the self-healing capacity (recovery in compressive strength) of the mortar. Subject Cementitious materialsMicroencapsulationSelf-healingSodium silicate To reference this document use: http://resolver.tudelft.nl/uuid:bc5b92d8-081e-4285-ab1b-9c0f5529a74d DOI https://doi.org/10.1016/j.jobe.2021.102279 Embargo date 2021-08-14 ISSN 2352-7102 Source Journal of Building Engineering, 39, 1-10 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2021 Ahsanollah Beglarigale, Doğa Eyice, Yoldaş Seki, Ç. Yalçinkaya, Oguzhan Copuroglu, Halit Yazici Files PDF 1_s2.0_S2352710221001352_main.pdf 9.85 MB Close viewer /islandora/object/uuid:bc5b92d8-081e-4285-ab1b-9c0f5529a74d/datastream/OBJ/view