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Optimizing Epoxy Interfacial Bonding Properties and Failure Mechanism between Carbon Textile-Reinforced Mortar
Shengkai Liu1,2, Hui Zhang1, Xiaoyuan Pei1
1Key Laboratory of Advanced Braided Composites, Ministry of Education, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|June 12, 2024
Summary
Improving concrete reinforcement interfaces is key. Sandblasting, optimal surfactant thickness, and nanomaterial doping significantly enhance bonding strength and structural performance.
Area of Science:
- Materials Science
- Civil Engineering
- Structural Engineering
Background:
- Textile-reinforced mortar (TRM) composites are vital for building reinforcement.
- The interface between TRM and concrete is critical for stress transfer but often a weak point.
- Existing methods to strengthen this interface yield scattered results.
Purpose of the Study:
- To comparatively study the effects of substrate surface treatment, surfactant thickness, and physical doping on interfacial bonding strength.
- To identify the most effective method for enhancing the bond between TRM and concrete.
Main Methods:
- Investigated sandblasting as a surface treatment for concrete substrates.
- Analyzed the impact of varying surfactant thickness (up to 0.5 kg/m²).
- Studied the effect of incorporating Al₂O₃ nanomaterials (2.5%) into the surfactant through physical doping.
Main Results:
- Sandblasting increased bending resistance by 50% by enhancing the bonding area.
- Optimal surfactant thickness inhibited crack formation.
- Al₂O₃ nanomaterial doping improved toughness, reduced shrinkage, and enhanced flexural/compressive properties, increasing ultimate load by 65%.
- Physical doping proved most effective for interfacial bonding.
Conclusions:
- Surface treatment, surfactant optimization, and nanomaterial doping are effective strategies to improve TRM-concrete interfacial bonding.
- Physical doping of surfactants offers the most significant enhancement and shows broad applicability in construction.
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