Notes

Types Of Concrete Blocks Or Concrete Masonry Items Present In Building Construction





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





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

The normal height and width of 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 is 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 on the framework, shape, size and manufacturing processes concrete blocks are mainly classified into 2 types plus they are:

Solid concrete blocks
Hollow concrete Blocks


Solid Concrete Blocks

Solid concrete blocks are generally used, that happen to be heavy in weight and manufactured from dense aggregate. They may be strong and provides good stability on the structures. So for large work of masonry like for load bearing walls these solid blocks are preferable. One can choose from large sizes when compared with bricks. So, it requires much less time to construct concrete masonry than brick masonry.


Hollow Concrete Blocks

Hollow concrete blocks contains void area greater than 25% of gross area. Solid section of hollow bricks ought to be more than 50%. The hollow part could possibly be separated into several components according to our requirement. They are made of lightweight aggregates. They are light weight blocks as well as simple to set up.

Kinds 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 with the ends or corners of masonry. The ends could possibly be door or window openings etc. these are arranged in a fashion that their plane end visible facing outward as well as other end is locked with the stretcher block.

Concrete Corner Blocks
Corner blocks are employed at the ends or corners of masonry. The ends might be window or door openings etc. they are arranged in a manner that their plane end visible external and other end is locked using the stretcher block.

Concrete Pillar Blocks
Pillar block is also recognized as double corner block. Generally they 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 widely-used should there be an elaborated window opening in the wall. These are linked to stretcher and corner blocks. For your provision of double hung windows, jamb blocks are incredibly helpful to provide space for the casing members of window.

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

Lintel Blocks
Lintel block or beam block is utilized when it comes to provision of beam or lintel beam. Lintel beam is mostly provided on top area of windows and doors, which bears the stress via top. Concrete lintel blocks have deep groove over the amount of block as shown in figure. After placing the blocks, this groove is full of concrete in addition to reinforcement.

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

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


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