Varieties Of Concrete Blocks Or Concrete Masonry Items Present In Construction

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

Concrete blocks are manufactured in required shape and sizes which could possibly be solid or hollow blocks.

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

Cement, aggregate, water can be used to prepare 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 around 3N/mm2. ASTM C-90-91 specifies the compressive strength requirements of concrete masonry units.

Kinds of Concrete Blocks or Concrete Masonry Units

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

Solid concrete blocks
Hollow concrete Blocks


Solid Concrete Blocks

Solid concrete blocks can be used, that are heavy in weight and produced from dense aggregate. These are very strong and gives good stability on the structures. So for large work of masonry like for load bearing walls these solid blocks are preferable. They are available in large sizes in comparison with bricks. So, it takes much less time to develop concrete masonry than brick masonry.


Hollow Concrete Blocks

Hollow concrete blocks contains void area more than 25% of gross area. Solid area of hollow bricks should be greater than 50%. The hollow part could be separated into several components according to our requirement. They may be manufactured from lightweight aggregates. They are lightweight blocks and easy 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 employed on the ends or corners of masonry. The ends could be window or door openings etc. they may be arranged in a fashion that their plane end visible to the outside along with other end is locked with all the stretcher block.

Concrete Corner Blocks
Corner blocks are widely-used with the ends or corners of masonry. The ends could be window or door openings etc. they're arranged in a manner that their plane end visible out as well as other end is locked with all the stretcher block.

Concrete Pillar Blocks
Pillar block can also be referred to as double corner block. Generally they are used when two ends in the corner are visible. In case of piers or pillars these blocks are popular.

Jamb Concrete Blocks
Jamb blocks are employed if you have an elaborated window opening from the wall. They are associated with stretcher and corner blocks. To the provision of double hung windows, jamb blocks are incredibly useful to provide space for your casing members of window.

Partition Concrete Block
Partition concrete blocks are usually utilized to build partition walls. Partition blocks have larger height than its breadth. Hollow part is split into 2 to 3 components in case of partition blocks.

Lintel Blocks
Lintel block or beam block can be used when considering provision of beam or lintel beam. Lintel beam is generally provided on the top percentage of doors and windows, which bears the burden coming from top. Concrete lintel blocks have deep groove over the amount of block as shown in figure. After placing the blocks, this groove is filled with concrete along with reinforcement.

Frogged Brick Blocks
Frogged brick block posesses a frog on its top together with header and stretcher like frogged brick. This frog will helps the block to support mortar and also to provide the strong bond with top laying block.

Bullnose Concrete Block
Bullnose blocks act like corner blocks. Their duties also same however, if we wish rounded edges at corner bullnose bricks are preferred.


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