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

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

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

Cement, aggregate, water is used to organize 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.

Forms of Concrete Blocks or Concrete Masonry Units

Dependant on the dwelling, shape, size and manufacturing processes concrete blocks are mostly classified into 2 types plus they are:

Solid concrete blocks

Hollow concrete Blocks

Solid Concrete Blocks

Solid concrete blocks are commonly used, that happen to be heavy in weight and produced from dense aggregate. They may be strong and provides good stability on the structures. So for giant work of masonry like for load bearing walls these solid blocks are preferable. They come in large sizes compared to bricks. So, it takes a shorter time to make concrete masonry than brick masonry.

Hollow Concrete Blocks

Hollow concrete blocks contains void area more than 25% of gross area. Solid section of hollow bricks ought to be a lot more than 50%. The hollow part could be split into several components determined by our requirement. They may be manufactured from lightweight aggregates. They are light-weight blocks and simple to install.

Types 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 in the ends or corners of masonry. The ends may be window or door openings etc. these are arranged in a fashion that their plane end visible facing outward and also other end is locked using the stretcher block.

Concrete Corner Blocks

Corner blocks are employed with the ends or corners of masonry. The ends may be window or door openings etc. these are arranged in a manner that their plane end visible to the outside along with other end is locked with all the stretcher block.

Concrete Pillar Blocks

Pillar block can also be referred to as double corner block. Generally these are generally used when two ends with the corner are visible. In the case of piers or pillars these blocks are traditionally used.

Jamb Concrete Blocks

Jamb blocks are employed if you have an elaborated window opening in the wall. These are linked to stretcher and corner blocks. For the provision of double hung windows, jamb blocks are incredibly useful to provide space for your casing individuals window.

Partition Concrete Block

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

Lintel Blocks

Lintel block or beam block can be used when considering provision of beam or lintel beam. Lintel beam is normally provided on top area of doors and windows, which bears the strain originating from top. Concrete lintel blocks have deep groove over the length of block as shown in figure. After placing the blocks, this groove is loaded with concrete as well as reinforcement.

Frogged Brick Blocks

Frogged brick block contains a frog on its top along with header and stretcher like frogged brick. This frog will helps the block to hold mortar and to develop the strong bond with top laying block.

Bullnose Concrete Block

Bullnose blocks are like corner blocks. Their duties also same when we’d like rounded edges at corner bullnose bricks are preferred.

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