What does spalling refer to?

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Multiple Choice

What does spalling refer to?

Spalling means the breaking away or flaking of surface layers of a material caused by internal pressure or stress. In concrete, for example, heat can turn moisture inside the pores into steam, creating pressure that forces chunks of the surface to detach. It’s not about melting (a phase change), nor about wood shrinking due to moisture loss, nor about concrete swelling from moisture or heat. Understanding spalling helps explain why surfaces can shed material under high heat, which is important for assessing structural conditions and safety.

Spalling means the breaking away or flaking of surface layers of a material caused by internal pressure or stress. In concrete, for example, heat can turn moisture inside the pores into steam, creating pressure that forces chunks of the surface to detach. It’s not about melting (a phase change), nor about wood shrinking due to moisture loss, nor about concrete swelling from moisture or heat. Understanding spalling helps explain why surfaces can shed material under high heat, which is important for assessing structural conditions and safety.

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