A burnished CMU is made by treating a standard CMU with an oxyacetylene torch to produce a very smooth surface on one or more faces of the unit.

Question

Quizplus · Accepted Answer

A burnished CMU, also known as a ground-faced block, is made by grinding or polishing the face of a standard concrete masonry unit (CMU) to achieve a smooth finish, not by treating it with an oxyacetylene torch.

A Burnished CMU Is Made by Treating a Standard CMU