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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.15 No.2
- 발행연도
- 2021.3
- 수록면
- 129 - 143 (15page)
이용수
초록· 키워드
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Concrete structures undergo internal damage; this usually starts at the atomic level with defects that then grow and form cracks, which can propagate through the material. Here, a method of preparation of poly(methyl methacrylate) (PMMA) nanocapsules adhesive system via miniemulsion polymerization technique is reported, where MMA + DMA (resin + accelerator) and BPO (hardener) components are separately encapsulated by PMMA shells. The crack-healing potential of these nanocapsules was then investigated by embedding them into the mortar matrix. The prepared PMMA core-shell self-healing nanostructures survived the mixing and hardening processes, and the hardened mortar alkaline environment. The stress fields associated with propagating cracks (load‐induced cracking) broke the brittle/weak inert shell of these core-shell structures, resulted in releasing the healing agents to bridge the nascent and early-stage fractures (< 10 μm) in a short time. Long-term healing was achieved through the formation of polymorph calcite crystals in the presence of moisture and CO₂, which improved the durability of mortar by filling the gaps. Formulation design (addition of chemical admixtures) and process parameters (blade design and mixing speed) were found to directly impact the uniform distribution of nanocapsules, the survival rate of nanocapsules, and the overall strength of the hardened concrete. The stepwise approach to formulate and fabricate a novel high-strength self-healing concrete system unlocks unique opportunities to design nanomaterials that safeguard the integrity of concrete structures.
목차
Abstract
1. Introduction
2. Experimental Section
3. Results and Discussion
4. Conclusion
References
참고문헌 (51)
참고문헌 신청
ABS / 2018 / Construction Activity / Australian Bureau of Statistic
Ahangaran, F. / 2019 / Material encapsulation in poly(methyl methacrylate) shell: a review / Journal of Applied Polymer Science 136:48039
Alghamri, R. / 2016 / Impregnation and encapsulation of lightweight aggregates for self-healing concrete / Construction and Building Materials 124:910~921
Araújo, M. / 2018 / Poly(Methyl Methacrylate) capsules as an alternative to the proof-of-concept’’ glass capsules used in self-healing concrete / Cement and Concrete Composites 89:260~271
ASTM / 2018 / C39/C39m-18, Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens / ASTM International
Ahangaran, F. / 2019 / Material encapsulation in poly(methyl methacrylate) shell: a review / Journal of Applied Polymer Science 136:48039
Alghamri, R. / 2016 / Impregnation and encapsulation of lightweight aggregates for self-healing concrete / Construction and Building Materials 124:910~921
Araújo, M. / 2018 / Poly(Methyl Methacrylate) capsules as an alternative to the proof-of-concept’’ glass capsules used in self-healing concrete / Cement and Concrete Composites 89:260~271
ASTM / 2018 / C39/C39m-18, Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens / ASTM International
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