Varieties Of Concrete Blocks Or Concrete Masonry Units Utilized In Building Construction

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

Concrete blocks are designed in required shape and sizes and the might 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, Ten inch and 12-inch unit configurations.

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

Types of Concrete Blocks or Concrete Masonry Units

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

Solid concrete blocks

Hollow concrete Blocks

Solid Concrete Blocks

Solid concrete blocks are normally used, that are heavy in weight and manufactured from dense aggregate. They are very strong and provides good stability to the structures. So for large work of masonry like for load bearing walls these solid blocks are preferable. They come in large sizes in comparison with bricks. So, it will take a shorter time to construct concrete masonry than brick masonry.

Hollow Concrete Blocks

Hollow concrete blocks contains void area in excess of 25% of gross area. Solid section of hollow bricks ought to be more than 50%. The hollow part may be divided into several components based on our requirement. They may be constructed from lightweight aggregates. They are transportable blocks and 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 may be window or door openings etc. they may be arranged in a way that their plane end visible facing outward along with other end is locked together with the stretcher block.

Concrete Corner Blocks

Corner blocks are used with the ends or corners of masonry. The ends could possibly be window or door openings etc. they are arranged in ways that their plane end visible facing outward along with other end is locked using the stretcher block.

Concrete Pillar Blocks

Pillar block is also known as double corner block. Generally they are used when two ends with the corner are visible. In case there is piers or pillars these blocks are trusted.

Jamb Concrete Blocks

Jamb blocks are employed should there be an elaborated window opening from the wall. These are connected to stretcher and corner blocks. For that provision of double hung windows, jamb blocks are incredibly useful to provide space to the casing folks window.

Partition Concrete Block

Partition concrete blocks are often employed to build partition walls. Partition blocks have larger height than its breadth. Hollow part is divided into 2-3 components in case of partition blocks.

Lintel Blocks

Lintel block or beam block is employed with regards to provision of beam or lintel beam. Lintel beam is normally provided at the top portion of doors and windows, which bears the stress coming from top. Concrete lintel blocks have deep groove over the duration of block as shown in figure. After placing the blocks, this groove is stuffed with concrete in addition to reinforcement.

Frogged Brick Blocks

Frogged brick block has a frog on its top along with header and stretcher like frogged brick. This frog will helps the block to carry mortar also to enjoy the strong bond with top laying block.

Bullnose Concrete Block

Bullnose blocks resemble corner blocks. Their duties also same but when we wish rounded edges at corner bullnose bricks are preferred.

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