A half-block concrete masonry unit is tested for compressive strength. Theoutside dimensions of the specimen are 190 mm * 190 mm * 190 mm.The cross section is a hollow square with a wall thickness of 25 mm. The load is applied perpendicular to the hollow cross section and the maxi-mum load is 225 kN. a. Determine the gross area compressive strength.b. Determine the net area compressive strength.

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Masonry Units

Concrete masonry is among the most surplus building materials present since a wide range of aspects can be accomplished using Concrete Masonry Units (CMU) as they have more benefits than stone or brick masonry. CMU are manufactured in a variety of shapes, colors, sizes, and patterns for various functions and finishing. Due to their modular properties, different CMU can be mixed in the same wall for various textures, colors, and so on. For the formation of the concrete blocks, cement, aggregate, and water are required.