Types Of Concrete Blocks Or Concrete Masonry Units Utilized In Construction

Concrete block masonry also is known as concrete masonry unit (CMU) have advantages over brick and stone masonry.

Concrete blocks are made in required shape and sizes and these could possibly be solid or hollow blocks.

The normal sized concrete blocks is 39cm x 19cm x (30cm or 20 cm or 10cm) or 2 inch, 4 inch, 6 inch, 8 inch, Ten inch and 12-inch unit configurations.

Cement, aggregate, water is employed to get ready concrete blocks.

The cement-aggregate ratio in concrete blocks is 1:6. Aggregate used is of 60% fine aggregate and 40% coarse aggregate.

Their Minimum strength is all about 3N/mm2. ASTM C-90-91 specifies the compressive strength requirements of concrete masonry units.

Varieties of Concrete Blocks or Concrete Masonry Units

Depending upon the dwelling, shape, size and manufacturing processes concrete blocks are mostly classified into 2 types and they are generally:

Solid concrete blocks
Hollow concrete Blocks


Solid Concrete Blocks

Solid concrete blocks can be used, that happen to be heavy in weight and constructed from dense aggregate. They may be strong and supplies good stability to the structures. So for big work of masonry like for load bearing walls these solid blocks are preferable. One can choose from large sizes in comparison with bricks. So, it will take a shorter time to make concrete masonry than brick masonry.


Hollow Concrete Blocks

Hollow concrete blocks contains void area greater than 25% of gross area. Solid division of hollow bricks needs to be over 50%. The hollow part could be divided into several components based on our requirement. They are manufactured from lightweight aggregates. They may be transportable blocks and simple to put in.

Varieties of Hollow Concrete Blocks:

Stretcher block
Corner block
Pillar block
Jamb block
Partition block
Lintel block
Frogged brick block
Bullnose block

Concrete Stretcher Blocks
Corner blocks are widely-used in the ends or corners of masonry. The ends could be door or window openings etc. they're arranged in a way that their plane end visible facing outward and also other end is locked with the stretcher block.

Concrete Corner Blocks
Corner blocks are used on the ends or corners of masonry. The ends may be door or window openings etc. they're arranged in a manner that their plane end visible external and other end is locked with all the stretcher block.

Concrete Pillar Blocks
Pillar block is also known as double corner block. Generally these are used when two ends from the corner are visible. In the event of piers or pillars these blocks are widely used.

Jamb Concrete Blocks
Jamb blocks are employed if you find an elaborated window opening inside the wall. These are attached to stretcher and corner blocks. For your provision of double hung windows, jamb blocks are very beneficial to provide space for the casing people in window.

Partition Concrete Block
Partition concrete blocks are generally employed to build partition walls. Partition blocks have larger height than its breadth. Hollow part is divided into two or three components in case there is partition blocks.

Lintel Blocks
Lintel block or beam block can be used for the purpose of provision of beam or lintel beam. Lintel beam is normally provided in the top percentage of doors and windows, which bears the burden originating from top. Concrete lintel blocks have deep groove across the duration of block as shown in figure. After placing the blocks, this groove is filled with concrete in addition to reinforcement.

Frogged Brick Blocks
Frogged brick block contains a frog on its top in addition to header and stretcher like frogged brick. This frog will helps the block to support mortar and enjoy the strong bond with top laying block.

Bullnose Concrete Block
Bullnose blocks are similar to corner blocks. Their duties also same however when we'd like rounded edges at corner bullnose bricks are preferred.


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