Feature | Reinforced Concrete (RC) Piles | Prestressed Concrete (PC) Piles |
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Definition | Concrete piles with standard steel reinforcement (rebars) | Concrete piles with prestressed steel tendons |
Type of Reinforcement | Mild steel rebars (passive) | High-tensile steel strands/wires (actively tensioned before casting) |
Pre-tension or Post-tension | No prestressing involved | Prestressing applied (usually pre-tensioned) |
Crack Resistance | Moderate – may crack under high tension | High – designed to resist tensile stresses and cracking |
Load Capacity | Lower load capacity per unit | Higher load capacity (for same cross-section) |
Durability | More prone to cracking and corrosion if not protected | Better resistance to corrosion due to tight, crack-free concrete |
Length & Slenderness | Generally shorter or thicker | Can be made longer and more slender |
Fabrication Method | Simple casting with rebars | Requires tensioning equipment and more precise control |
Cost | Generally cheaper to produce | More expensive due to prestressing steel and process |
Usage | Small to medium structures, buildings, short-span bridges | Large buildings, high-rise foundations, marine structures, long-span bridges |
Common Shape | Square or circular cross-sections | Mostly spun (circular) or square precast piles |
Advantages
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High load-bearing capacity.
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Good resistance to corrosion (especially when properly designed).
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Can be used for a wide range of soil types and water tables.
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Long service life with minimal maintenance.
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