Influence of Recycling Processes on Properties of Fine Recycled Concrete Aggregates (FRCA): An Overview
Abstract
:1. Introduction
2. Recycling Technologies
Type | Technology | References |
---|---|---|
Mechanical | Jaw Crusher | [5,6,10,11,12,13,14,15,16,17,18,19,20,21,22,23,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53] |
Impact Crusher (HSI/VSI) | [5,6,18,19,23,24] | |
Cone Crusher | [21,39] | |
Rotor Crusher | [12,20] | |
Screw Crusher | [54,55] | |
Ball Mill | [12,14,15,16,17,32,41] | |
Wet Scrubbing | [39] | |
Sieving | [5,6,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,56,57,58,59,60,61,62,63,64,65,66,67] | |
Physical | Dry-Density Separator | [6,22,31] |
Heavy Liquid Separation | [31,67] | |
Magnetic Separator | [31,67,68] | |
Chemical | Acid Attack | [69] |
Thermomechanical | Scrubbing | [31] |
2.1. Mechanical
2.1.1. Jaw Crusher
2.1.2. Horizontal Shaft Impact Crusher (HSI) and Vertical Shaft Impact Crusher (VSI)
2.1.3. Cone Crusher
2.1.4. Rotor Crusher
2.1.5. Screw Crusher
2.1.6. Ball Mill
2.1.7. Wet Scrubbing
2.1.8. Sieving
2.2. Physical
2.2.1. Dry Density Separator
2.2.2. Heavy Liquid Separation
2.2.3. Magnetic Separator
2.3. Chemical Acid Attack
2.4. Thermomechanical Scrubbing
3. Recycling Processes
4. Normative Requirements of FRCA
5. Influence of Recycling Processes on Properties of FRCA
- Laboratory concrete specimens from technological control tests, labelled with LAB;
- Concrete waste from other sources, labelled with CW.
5.1. Particle Size Distribution (PSD)
5.2. Water Absorption
5.3. Oven-Dry Density
5.4. Correlation between Oven-Dry Density and Water Absorption
5.5. Adhered Paste
5.6. Correlation between Adhered Paste and Water Absorption
6. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Characteristic | Jaw Crusher | Impact Crusher | Cone Crusher | Basis of Comparison |
---|---|---|---|---|
Efficiency | High | Medium | Low | Particle size reduction |
Aggregate Quality | Low | High | Medium | Size distribution, rounded shape |
Fines Content | Low | High | High | Fine particles (0 mm to 40 mm) |
Production Cost | Low | High | Medium | Energy, maintenance, operation |
Energy Consumption | Low | High | Medium | Electricity |
Wearing | Low | Medium | Low | Maintenance |
Property | Limits (JIS A 5021) | Limits (KS 2573) |
Oven-dry density (kg/m3) | ≥2500 | ≥2200 |
Water absorption (%) | ≤3.0 | ≤5.0 |
Solid volume percentage for shape determination (%) | ≥53 | ≥53 |
Amount of material passing test sieve 75 μm (%) | ≤7.0 | ≤7.0 |
Chloride ion content (%) | ≤0.4 | - |
Impurities | Limits (mass %) | Limits (mass %) |
Category A—Tile, brick, ceramics, asphalt | ≤2.0 | - |
Category B—Glass | ≤0.5 | - |
Category C—Plaster | ≤0.1 | - |
Category D—Inorganic substances other than plaster | ≤0.5 | - |
Category E—Plastics | ≤0.5 | - |
Category F—Wood, paper, asphalt | ≤0.1 | - |
Organic | - | ≤1.0 |
Inorganic | - | ≤1.0 |
Total | ≤3.0 | ≤2.0 |
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Sbardelotto, E.K.; dos Santos, K.F.; Martins, I.M.; Toralles, B.M.; Vieira, M.G.; Brazão Farinha, C. Influence of Recycling Processes on Properties of Fine Recycled Concrete Aggregates (FRCA): An Overview. Waste 2024, 2, 136-152. https://doi.org/10.3390/waste2020008
Sbardelotto EK, dos Santos KF, Martins IM, Toralles BM, Vieira MG, Brazão Farinha C. Influence of Recycling Processes on Properties of Fine Recycled Concrete Aggregates (FRCA): An Overview. Waste. 2024; 2(2):136-152. https://doi.org/10.3390/waste2020008
Chicago/Turabian StyleSbardelotto, Eduardo Kloeckner, Karyne Ferreira dos Santos, Isabel Milagre Martins, Berenice Martins Toralles, Manuel Gomes Vieira, and Catarina Brazão Farinha. 2024. "Influence of Recycling Processes on Properties of Fine Recycled Concrete Aggregates (FRCA): An Overview" Waste 2, no. 2: 136-152. https://doi.org/10.3390/waste2020008