How does frost wedging cause fractures in poorly sealed concrete sculptures?
Frost wedging is a natural weathering process that causes fractures in poorly sealed concrete sculptures through repeated freeze-thaw cycles. When water seeps into tiny cracks or pores in the concrete, it expands upon freezing, exerting pressure on the surrounding material. Over time, this expansion widens existing cracks and creates new ones, weakening the sculpture's structure. Poorly sealed concrete is especially vulnerable because it allows more water infiltration. As temperatures fluctuate, the cycle repeats, gradually breaking down the material. This process can lead to significant damage, including spalling, flaking, and deep fractures, ultimately compromising the sculpture's integrity. Preventive measures, such as proper sealing and drainage, can help mitigate frost wedging effects.
