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Optimum Mix Design and Correlation Analysis of Pervious Concrete
Fenting Lu1, Li Yang1, Yaqing Jiang1
1School of Civil Engineering, Wanjiang University of Technology, Ma'anshan 243031, China.
Materials (Basel, Switzerland)
|September 13, 2025
Summary
This study optimized pervious concrete mix design, balancing permeability and strength. The optimal mix achieved high compressive strength and permeability, providing a framework for sustainable infrastructure.
Area of Science:
- Civil Engineering
- Materials Science
- Sustainable Infrastructure
Background:
- Pervious concrete faces a trade-off between permeability and mechanical strength.
- Optimizing mix design is crucial for balancing these properties.
Purpose of the Study:
- To systematically optimize pervious concrete mix design for balanced permeability and mechanical strength.
- To establish quantitative relationships between mix parameters, porosity, and performance.
Main Methods:
- Single-factor experiments and L9(3^3) orthogonal array tests.
- Evaluation of target porosity, water-cement ratio, sand rate, and VMA dosage.
- Spearman rank correlation and nonlinear regression analysis.
Main Results:
- Increased porosity enhances permeability but reduces strength.
- Optimal w/c ratio of 0.32, sand content of 6%, and VMA dosage of 0.01% identified.
- Optimal mix (w/c=0.3, VMA=0.12%, porosity=14%, sand=7%) yielded 43.5 MPa compressive strength and 2.57 mm/s permeability.
Conclusions:
- Derived empirical relationships between porosity and performance (permeability, strength).
- Established a systematic framework for designing high-performance pervious concrete.
- Findings support the development of pervious concrete for green infrastructure.
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