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A conical hole in plastered surface is formed due to ___________(a) Popping(b) Rust stains(c) Softness(d) Uneven surfaceI got this question in an online quiz.My enquiry is from Defects in Plastering topic in section Pointing and Plastering of Construction & Building Materials

Answer» RIGHT choice is (a) Popping

To elaborate: SOMETIMES the Plaster mix contains particles with expand on being set. A conical hole in plastered surface is formed in FRONT of the particle. This conical whole is known as the blow or POP.


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