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Investigation on Fatigue Performance of Diatomite/Basalt Fiber Composite Modified Asphalt Mixture
Chunfeng Zhu1, Huijin Luo1, Wei Tian1
1College of Civil Engineering, Jilin Jianzhu University, Changchun 130118, China.
Polymers
|February 15, 2022
Summary
Adding diatomite and basalt fiber enhances asphalt mixture durability. The composite modification significantly improves fatigue resistance, with cumulative dissipation energy being the key factor influencing fatigue life.
Area of Science:
- Materials Science
- Civil Engineering
- Pavement Engineering
Background:
- Asphalt pavement durability is critical for infrastructure longevity.
- Fatigue resistance is a key performance indicator for asphalt mixtures.
- Improving asphalt mixture fatigue properties is essential for extending pavement service life.
Purpose of the Study:
- To investigate the effect of diatomite and basalt fiber on asphalt mixture fatigue resistance.
- To optimize the content of diatomite and basalt fiber for enhanced performance.
- To analyze the correlation between fatigue life and various influencing factors.
Main Methods:
- Marshall test and Response Surface Methodology (RSM) for mixture design optimization.
- Four-point bending fatigue test using a servo-controlled testing machine.
- Analysis of stiffness modulus, lag angle, and cumulative dissipation energy.
Main Results:
- Both diatomite and basalt fiber improved the fatigue resistance of asphalt mixtures.
- The composite modified asphalt mixture (DBFAM) exhibited superior fatigue performance.
- Cumulative dissipation energy (E) was identified as the most significant factor affecting fatigue life.
Conclusions:
- Diatomite and basalt fiber are effective modifiers for enhancing asphalt mixture fatigue resistance.
- Composite modification offers synergistic benefits for pavement durability.
- Understanding the influence of cumulative dissipation energy is crucial for predicting asphalt pavement fatigue life.
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