Efflorescence on plastered surface causes which of the following effects to appear?
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A.
Rust stains or patches
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B.
Growth patches of organic matter
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C.
Oozing out of a viscous liquid
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D.
Whitish crystalline substance
Correct Answer:
D. Whitish crystalline substance
Explanation:
The correct answer is Whitish crystalline substance.
Efflorescence is a common masonry issue where salt deposits form on the surface of materials like plaster, brick, or concrete. This occurs when water dissolves internal salts and carries them to the exterior; as the moisture evaporates, it leaves behind a visible whitish crystalline substance. Beyond being an aesthetic concern, the buildup of these crystals can lead to the gradual degradation of the plaster surface if left unaddressed. This phenomenon usually indicates excess moisture within the structure that needs to be mitigated to prevent further scaling or peeling.
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