Spall

Definition

A spall is a fragment, usually in the shape of a flake, detached from a larger mass by a blow, by the action of weather, by pressure, or by expansion within the larger mass.

Purpose

The purpose of understanding spalling is to identify and address structural issues caused by the detachment of material fragments, which can compromise the integrity and appearance of the affected structure.

Examples of Use

• Concrete structures can experience spalling due to freeze-thaw cycles, causing surface deterioration.
• Masonry walls may spall due to weathering or mechanical impact, leading to the loss of material.
• Metal components can spall under high stress or thermal expansion, resulting in surface damage.

Related Terms

• Erosion: The gradual wearing away of a material by natural forces.
• Deterioration: The process of becoming progressively worse due to environmental or mechanical factors.
• Delamination: The separation of layers in a composite material, similar to spalling.

Notes

Preventing and repairing spalling involves proper material selection, maintenance, and timely intervention to address underlying causes and restore structural integrity.

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