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Self-Healing Performance Evaluation of Concrete Incorporating Inorganic Materials Based on a Water Permeability Test
Kwang-Myong Lee1, Hyung-Suk Kim1, Do-Keun Lee2
1Department of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University, Suwon 16419, Korea.
Materials (Basel, Switzerland)
|July 2, 2021
Summary
This study introduces standardized methods for evaluating self-healing concrete, focusing on inorganic admixtures. The research validates water permeability tests and proposes a new index for assessing the performance of self-healing materials.
Area of Science:
- Materials Science
- Civil Engineering
- Construction Materials
Background:
- Self-healing concrete technologies aim to enhance material capacity.
- Assessing self-healing performance requires standardized methods due to influencing factors.
Purpose of the Study:
- To validate the water permeability test for self-healing materials.
- To propose protocols for evaluating self-healing performance.
- To develop a comprehensive chart for assessing cement-based material healing.
Main Methods:
- Production of self-healing mortars with inorganic admixtures (0.3 mm crack sealing, 90% healing index).
- Comparative study evaluating three self-healing mortars and one plain mortar.
- Validation of water permeability test and proposal of equivalent crack width as an evaluation index.
Main Results:
- Water permeability test validated for self-healing mortar performance.
- Equivalent crack width, derived from water flow rate, suggested as a rational evaluation index.
- A self-healing performance chart developed for comprehensive assessment.
Conclusions:
- Standardized test methods are crucial for verifying and comparing self-healing material performance.
- The proposed protocols and evaluation index enhance the assessment of self-healing concrete.
- The performance chart offers a holistic view of cement-based material healing capabilities.
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