Which limit increases spalling in reinforced concrete columns exposed to rapid heating?

💡 Explanation

Spalling increases because moisture vaporizes and expands rapidly under heat, exceeding the concrete's tensile strength, which is called explosive spalling. Therefore, higher intrinsic moisture leads to greater pressure rather than aggregate strength, which affects compressive capabilities under normal circumstances.

• Which outcome occurs on aircraft landing when strut rebound exceeds hydraulic dampening?
• Which mechanism compromises stability when an aircraft's yaw damper control system malfunctions?
• Which risk increases significantly when detonation raises pressure in a combustion chamber?
• Which risk dramatically increases when hydraulic actuator's piston seal fails in closed-loop system?
• Which risk increases when electronic heat sink fan RPM degrades due to dust accumulation?
• Which risk increases when a post-tensioned concrete beam experiences sudden tendon rupture during construction?