Study on Vibration Compaction Behavior of Fresh Concrete Mixture with Ternary Aggregate Grading

Area of Science:

• Civil Engineering
• Materials Science

Background:

• Vibration compaction is crucial for fresh concrete quality.
• Fully graded concrete has distinct compaction characteristics compared to conventional two-graded concrete.

Purpose of the Study:

• To establish an energy transfer model for fully graded concrete during vibration compaction.
• To analyze the spatiotemporal attenuation of vibration energy.
• To determine safe vibration parameters for fully graded concrete.

Main Methods:

• Measured vibration responses of an internal vibrator.
• Sinking-ball tests.
• Development of an energy transfer model incorporating aggregate properties and dynamic parameters.
• Segregation assessment and porosity analysis.

Main Results:

• Fully graded concrete exhibits higher initial energy absorption (max 423 W) and peak efficiency (76.3%) than two-graded concrete.
• Energy absorption attenuates rapidly after initial high absorption.
• A safe vibration energy range of 159.7–538.5 J·kg⁻¹ was determined.
• Recommended vibration durations (30–65 s) and influence radii (22–85 mm) were identified.

Conclusions:

• The energy transfer model accurately describes vibration behavior in fully graded concrete.
• Quantitative guidelines for vibration parameters ensure effective compaction and prevent defects.
• Findings support energy-oriented construction practices for fully graded concrete.