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Research on Interlayer Bonding Quality Control Method of Dam Concrete Based on Equivalent Age
Wei-Jia Liu1, You-Bo Wang1, Qing-Bin Li1
1State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China.
Materials (Basel, Switzerland)
|September 28, 2021
Summary
This study shows that higher temperatures degrade dam concrete interlayer bonding quality. An early-warning system using equivalent age effectively monitors and controls this critical property for dam stability.
Area of Science:
- Civil Engineering
- Materials Science
- Geotechnical Engineering
Background:
- Interlayer bonding quality is crucial for dam concrete stability and durability.
- Temperature significantly influences the performance and longevity of concrete structures.
Purpose of the Study:
- To investigate the impact of temperature on dam concrete interlayer bonding quality.
- To establish relationships between equivalent age and key bonding parameters.
- To propose an early-warning and control system for dam interlayer bonding.
Main Methods:
- Testing interlayer splitting tensile strength, relative permeability coefficient, and electric flux at various temperatures.
- Establishing correlations between equivalent age and strength coefficient, relative permeability coefficient ratio, and electric flux ratio.
- Developing a comprehensive early-warning and control system based on these correlations.
Main Results:
- Interlayer mechanical properties, impermeability, and anti-chloride ion permeability decrease with increasing temperature.
- Equivalent age showed strong linear correlations with strength coefficient (R=0.986), relative permeability coefficient ratio (R=0.973), and electric flux ratio (R=0.924).
Conclusions:
- Temperature negatively affects dam concrete interlayer bonding properties.
- The established relationships and early-warning system provide effective control over dam interlayer bonding quality.
Keywords:
dam concreteearly-warning systemequivalent ageinterlayer bonding qualityinterlayer propertiesMore Related Videos
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