Related Experiment Video
Updated: Jun 13, 2026
08:27
Image Recognition and Parameter Analysis of Concrete Vibration State Based on Support Vector Machine
Published on: January 5, 2024
Multi-objective optimization of low-noise pervious concrete using a stacking ensemble learning and NSGA-II approach
Fan Yu1,2, Haoyun Zhang1,2, SiYe Zhang3
1College of Civil Engineering and Architecture, China Three Gorges University, Yichang, 443002, China.
Scientific Reports
|June 11, 2026
Summary
This study optimizes pervious concrete mix designs for low-noise pavements using Stacking ensemble learning and NSGA-II. The method balances acoustic, mechanical, and hydraulic properties, significantly improving sound absorption.
Area of Science:
- Materials Science
- Civil Engineering
- Acoustics
Background:
- Pervious concrete faces performance conflicts between acoustic, mechanical, and hydraulic properties, hindering its use in low-noise pavements.
- Optimizing mix proportions is crucial to balance these competing characteristics.
Purpose of the Study:
- To develop a multi-objective optimization method for pervious concrete mix proportions.
- To enhance sound absorption while maintaining permeability and compressive strength.
Main Methods:
- Established a comprehensive database for training a Stacking ensemble learning model for sound absorption prediction.
- Integrated sound absorption, compressive strength, and permeability models into the NSGA-II genetic algorithm for multi-objective optimization.
- Validated optimization results through experimental testing.
Main Results:
- Aggregate gradation significantly impacts sound absorption, with a 95.7% improvement in optimal vs. poorest gradations.
- The Stacking ensemble model achieved R²=0.97, surpassing individual models.
- The optimized mix proportion (O3) met permeability and strength standards while exceeding single-sized aggregate sound absorption.
Conclusions:
- The proposed optimization framework effectively resolves performance conflicts in pervious concrete.
- Optimized pervious concrete demonstrates superior sound absorption, permeability, and strength.
- The Stacking ensemble learning and NSGA-II approach provides a reliable method for material performance optimization.
Related Concept Videos
01:14Design Example: Managing Concrete Workability
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
To address...
To address...
01:28Effects of Air-entrainment in Concrete
Air entrainment in concrete significantly enhances the material's durability, especially in environments subjected to freeze-thaw cycles. Introducing small air bubbles into the concrete mix acts as internal voids that accommodate the expansion of water when it freezes, thereby alleviating internal stress and preventing structural cracks. This function is crucial in climates with significant freezing and thawing, as it protects the concrete from repeated stresses that could lead to premature...
01:25Workability of Concrete
The workability of concrete is a crucial property that affects its handling, placing, and finishing during construction. It describes the ease with which concrete can be mixed, placed, compacted, and finished. Workability is primarily concerned with the concrete's movement and its ability to resist internal friction and external resistance from molds and reinforcements during the application process.
Concrete's workability is determined by its resistance to internal forces that arise when...
Concrete's workability is determined by its resistance to internal forces that arise when...
01:16Segregation in Fresh Concrete
Segregation in fresh concrete is a phenomenon where the components of the concrete mix separate, leading to uneven distribution and compromised structural integrity. This separation typically occurs when concrete is subjected to excessive horizontal movement within forms, or when it is dropped from considerable heights or forced through narrow, winding paths. As a result, heavier coarse aggregate particles settle at the bottom, while lighter, finer materials such as cement and water rise to the...
01:25Reinforcements in Concrete
Reinforced concrete is a composite material used extensively in construction, combining the compressive strength of concrete with the tensile strength of steel. This synergy is essential as concrete, while excellent at resisting compression, is weak under tension. Steel bars, or rebars, are embedded in the concrete to handle these tensile forces. The choice of steel is strategic; it shares a similar coefficient of thermal expansion with concrete, which ensures uniformity in response to...
01:29Preplaced Aggregate Concrete
Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...