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A ferrocement overlay on a masonry wall consists of

  • A.a thick layer of plain plaster applied to both faces of the wall in turn
  • B.reinforced concrete cast against the wall in conventional formwork
  • C.steel plates bolted to the surface of the wall at close intervals
  • D.wire mesh anchored to the wall and covered in rich mortar

Answer: D

The mesh gives the panel tensile strength in both directions, and the mortar bonds it to the masonry so that the two act together. Anchorage of the mesh through the wall is what decides whether the overlay stays attached.

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