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2000
Volume 11, Issue 1
  • ISSN: 2405-4615
  • E-ISSN: 2405-4623

Abstract

Introduction

This study aims to investigate the effect of the addition of Nano MgO on the self-healing behavior of concrete.

Methods

The Nano MgO were added to the concrete mixtures at ratios of (0.3, 0.4, 0.5, and 0.6)% by weight of cement, respectively. Then, the compressive strength, density, and water absorption were measured at ages (7, 14, and 28) days.

Results

The results showed that the best compressive strength, density, and lowest water absorption were obtained by mixing 0.4% MgO with the weight of cement. SEM and EDX were used to characterize the concrete samples. SEM examination of the concrete samples with 0.4% MgO by weight of cement showed a dense microstructure with no pores and the formation of CSH. Microcapsules containing cement with 0.4% Nano MgO were prepared using a fluidized bed coating process (Pelletization method). The microcapsules were then added to concrete with (7, 10, and 13)% of the cement's weight. Compressive strength, water absorption, density, flexural strength, and splitting tensile strength tests were performed to study concrete properties. According to the results, MgO microcapsules were used as a useful material for the self-healing cracking process.

Conclusion

They also improved concrete compressive strength, water absorption, density, flexural strength, and splitting tensile strength. 10% weight was selected as the best addition that enhances the characteristics that may be used in construction.

© 2026 Bentham Science Publishers
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2024-07-11
2026-02-25

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Evaluation of Microcapsules Filled with Nano Magnesium Oxide for Self-Healing Concrete
Curr. Nanomater. 11, 92 (2026); https://doi.org/10.2174/0124054615317351240620100017
/content/journals/cnm/10.2174/0124054615317351240620100017
/content/journals/cnm/10.2174/0124054615317351240620100017
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  • Article Type:     Research Article
Keyword(s): mechanical properties; MgO microcapsules; nano composite; nano MgO; pelletization method; Self-healing

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