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Published on: September 12, 2019
Microscopic Characterization and Efficiency Coefficient Evaluation of Modified Recycled Concrete Micropowder in
Qiuyi Li1, Pengfei Zhang1, Mingxu Chen1
1College of Civil Engineering & Architecture, Qingdao Agricultural University, Qingdao 266109, China.
Materials (Basel, Switzerland)
|June 12, 2026
Summary
This study introduces modified recycled micropowder (MRM) from construction waste to create sustainable building materials. MRM enhances cementitious properties and freeze-thaw resistance, offering an eco-friendly solution for recycled mortar in cold regions.
Area of Science:
- Materials Science
- Sustainable Construction
- Civil Engineering
Background:
- Construction waste poses environmental challenges.
- Recycled cement-based materials offer sustainable alternatives.
- Optimizing recycled materials requires understanding their properties.
Purpose of the Study:
- To investigate the properties of modified recycled micropowder (MRM) for sustainable buildings.
- To analyze the impact of calcination temperature on CRM activation.
- To evaluate the performance of recycled silica-based mortar (RSM) with MRM.
Main Methods:
- High-temperature calcination of concrete-based recycled micropowder (CRM) to produce MRM.
- X-ray diffraction, Brunauer-Emmett-Teller surface area, and hydration heat tests.
- Compressive strength and freeze-thaw cycle testing of RSM with MRM.
Main Results:
- 800 °C is the optimal calcination temperature for CRM activation.
- MRM incorporation increases C-S-H, hydration products, and hydration reactions.
- RSM with MRM showed improved compressive strength (24.3–42.3 MPa) and freeze-thaw resistance.
Conclusions:
- MRM significantly enhances the mechanical properties and durability of recycled mortar.
- Optimal MRM addition (20%) improves performance, while 10% MRM offers good freeze-thaw resistance.
- MRM provides an eco-friendly solution for recycled mortar applications in cold regions.
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