Related Experiment Video
Updated: Mar 29, 2026
11:07
Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior
Published on: June 27, 2018
11.8K
Mechanical Performance of Basalt Fiber-Reinforced Fully Recycled Concrete Using Triple-Modified Recycled Aggregates
Xinzhong Wang1, Biao Zhou1, Weidong Cheng1
1College of Civil Engineering, Hunan City University, Yiyang 413000, China.
Materials (Basel, Switzerland)
|March 28, 2026
Summary
This study introduces a triple synergistic modification for recycled concrete aggregate (RCA), significantly enhancing the interfacial transition zone (ITZ) properties. The method boosts recycled concrete strength and tensile properties, promoting sustainable construction materials.
Area of Science:
- Materials Science
- Civil Engineering
- Sustainable Construction
Background:
- Recycled concrete aggregate (RCA) exhibits surface cracks and defects, weakening the ITZ with cement paste.
- This limitation hinders the performance of fully recycled concrete.
Purpose of the Study:
- To develop a triple synergistic modification method for RCA.
- To enhance the properties of recycled aggregate and improve the ITZ structure.
- To evaluate the mechanical performance of modified basalt fiber-reinforced fully recycled concrete.
Main Methods:
- Treatment of RCA with calcium ion accelerating solution.
- Dopamine polymerization treatment of RCA.
- Nanofiber reinforcement of RCA.
- Mechanical property testing of modified basalt fiber-reinforced fully recycled concrete.
Main Results:
- Triple modification significantly optimizes the RCA-cement paste ITZ structure.
- A 56% increase in 28-day compressive strength (27.7 MPa) was observed.
- A 129% improvement in splitting tensile strength (5.32 MPa) was achieved.
- Microscopic analysis revealed gradient strengthening via pore filling, chemical bonding, and fiber bridging.
Conclusions:
- The triple modification method effectively enhances RCA properties and concrete performance.
- This approach offers a new strategy for high-performance fully recycled concrete.
- The research supports sustainable development in the construction industry.
Related Concept Videos
01:22Fiber Reinforced Concrete
537
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
537
01:23Abrasion Resistance of Concrete
709
Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
One such test is the revolving disc test, where three plates...
One such test is the revolving disc test, where three plates...
709
01:21Aggregate Cement Ratio
965
The Aggregate Cement ratio refers to the weight of aggregate divided by the weight of cement in a concrete mix. Altering this ratio has profound effects on the concrete's properties. This ratio plays a pivotal role in determining the strength, workability, and durability of concrete. When the Aggregate Cement ratio is higher, the mix is leaner, meaning it has less cement paste to lubricate the aggregate, potentially making the concrete less workable. Such mixes, known as lean, enhance the...
965
01:25Reinforcements in Concrete
922
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...
922
01:12Bonding and Strength of Aggregate
899
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
899
01:21Impact Strength of Concrete
697
Impact strength in concrete is a critical measure that reflects the material's capability to endure the forces applied during pile driving and when supporting machinery foundations that experience impulsive loads. It is also essential when handling precast concrete components to prevent accidental damage. The impact strength is assessed by observing the concrete's resistance to repeated impacts and energy absorption capacity. A key indicator of significant damage to concrete is when it...
697