Paste, aggregate, or air? That is the question
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View abstract on PubMed
Summary
This summary is machine-generated.The Gordie Howe International Bridge uses advanced automated methods to assess air entrainment in concrete, ensuring durability. This study demonstrates a new neural network approach for automated paste content determination in large-scale infrastructure projects.
Area Of Science
- Civil Engineering
- Materials Science
- Construction Technology
Background
- The Gordie Howe International Bridge, a significant North American infrastructure project, requires durable concrete for its harsh environment.
- Traditional methods for assessing concrete quality, like air entrainment, can be time-consuming and labor-intensive.
Purpose Of The Study
- To detail the application of ASTM C 457 Procedure C, Contrast Enhanced Method for air void assessment in the Gordie Howe International Bridge project.
- To demonstrate a novel approach for automated paste content determination using recorded data from manual point counts and neural network training.
Main Methods
- Utilized the ASTM C 457 Procedure C, Contrast Enhanced Method for automated microscopic analysis of air voids in hardened concrete.
- Employed digital image processing for air void characteristic determination.
- Recorded digital image coordinates and phase identifications during manual point counts to train a neural network for automated paste content analysis.
Main Results
- Successfully applied automated air void assessment on a large scale for North American infrastructure.
- Demonstrated the feasibility of training a neural network for automated paste content determination, complementing traditional methods.
- Ensured the quality of air entrainment in concrete crucial for the bridge's durability in a freeze-thaw environment.
Conclusions
- The automated microscopic approach for air void assessment, as per ASTM C 457 Procedure C, is effective for large-scale infrastructure.
- The developed neural network offers a promising method for automated paste content determination, enhancing quality control in concrete construction.
- This integrated approach ensures the long-term durability of critical infrastructure like the Gordie Howe International Bridge.
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