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Dynamic Properties of Pretreated Rubberized Concrete under Incremental Loading.
Aijiu Chen1, Xiaoyan Han2, Zhihao Wang1
1School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhenzhou 450045, China.
Materials (Basel, Switzerland)
|April 30, 2021
Summary
Recycling scrap tires into concrete offers benefits. Pretreated rubberized concrete shows improved strength and energy dissipation, though stiffness decreases with stress.
Area of Science:
- Materials Science
- Civil Engineering
- Sustainable Construction
Background:
- Recycling scrap tires is crucial for environmental sustainability.
- Incorporating rubberized materials in concrete presents unique engineering challenges and opportunities.
- Understanding the dynamic properties of damaged concrete is vital for structural integrity.
Purpose of the Study:
- To investigate the dynamic properties of pretreated rubberized concrete under cumulative damage.
- To analyze the effects of incremental stress on natural frequency, flexural dynamic stiffness, and damping ratio.
- To evaluate the influence of pretreated rubber particle content on concrete's energy dissipation capacity.
Main Methods:
- Specimen preparation using pretreated rubber particles as aggregate.
- Dynamic property testing under incremental stress levels.
- Measurement of natural frequency, flexural dynamic stiffness, and damping ratio.
- Analysis of energy dissipation during failure.
Main Results:
- Pretreatment of rubber particles enhanced concrete strength, ductility, and crack resistance.
- Flexural dynamic stiffness decreased with increasing concrete stress levels.
- Pretreated rubber particles improved concrete's energy dissipation capacity, with higher rubber content leading to greater energy dissipation before failure.
Conclusions:
- Pretreated rubberized concrete demonstrates improved mechanical and energy absorption characteristics.
- The study clarifies the relationship between stress level, dynamic properties, and rubber content in concrete.
- Recycling tires as aggregates is a viable sustainable option for enhancing concrete performance.
Keywords:
damping ratiodynamic propertiesflexural dynamic stiffnessnatural frequencypretreated rubberized concretestress levelMore Related Videos
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