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Cement-Based Repair Materials and the Interface with Concrete Substrates: Characterization, Evaluation and
Xuemin Song1, Xiongfei Song1, Hao Liu1
1School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
Polymers
|April 12, 2022
Summary
Timely repair of concrete surface damages is crucial for structural longevity. This review covers inorganic repair materials and techniques, focusing on improving the bond between repair materials and concrete substrates for effective restoration.
Area of Science:
- Civil Engineering
- Materials Science
Background:
- Concrete structures are prone to surface damages, necessitating timely repairs to maintain functionality and extend service life.
- Effective repair requires materials with specific properties and strong interfacial bonding with the concrete substrate.
Purpose of the Study:
- To review essential requirements for concrete repair materials.
- To summarize commonly used inorganic repair materials and interface enhancement techniques.
- To discuss the mechanisms behind improved interfacial bonding for concrete repair.
Main Methods:
- Literature review of inorganic repair materials for concrete structures.
- Analysis of cement-based, alkali-activated, and polymer-modified inorganic repair materials.
- Summary of techniques for characterizing and improving repair material-substrate interfaces.
Main Results:
- Cement-based materials offer good mechanical properties but suffer from high shrinkage and low flexibility.
- Polymer-modified materials exhibit reduced shrinkage and enhanced flexural strength.
- Surface preparation (roughness, humidity), fiber addition, and interfacial agents improve bond strength.
Conclusions:
- Optimizing interfacial bonding is key to successful concrete surface repair.
- Understanding material properties and interface enhancement mechanisms guides the development of advanced repair solutions.
- Effective repair strategies ensure structural integrity and prolong the lifespan of concrete infrastructure.
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