• Kinds Of Concrete Blocks Or Concrete Masonry Units Used In Construction

    Concrete block masonry which called concrete masonry unit (CMU) have advantages over brick and stone masonry.
    Concrete blocks are designed in required shape and sizes and the may be solid or hollow blocks.
    The regular size 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 employed 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
    Based upon 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 normally used, that are heavy in weight and produced from dense aggregate. They are very 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 when compared with bricks. So, it will require less time to create concrete masonry than brick masonry.

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    Hollow Concrete Blocks
    Hollow concrete blocks contains void area higher than 25% of gross area. Solid division of hollow bricks needs to be over 50%. The hollow part could be divided into several components depending on our requirement. They are made of lightweight aggregates. They may be transportable blocks and straightforward to set up.
    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 at the ends or corners of masonry. The ends could be door or window openings etc. they're arranged in ways that their plane end visible to the outside and also other end is locked with the stretcher block.

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

    Concrete Pillar Blocks
    Pillar block can be called as double corner block. Generally they're used when two ends with the corner are visible. In case of piers or pillars these blocks are popular.

    amb Concrete Blocks
    Jamb blocks are used when there is an elaborated window opening in the wall. They may be attached to stretcher and corner blocks. For that provision of double hung windows, jamb blocks are very helpful to provide space for the casing people in window.

    Partition Concrete Block
    Partition concrete blocks are often utilized to build partition walls. Partition blocks have larger height than its breadth. Hollow part is split into 2 to 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 at the top part of windows and doors, which bears the load originating from top. Concrete lintel blocks have deep groove across the amount 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 includes a frog on its top along with header and stretcher like frogged brick. This frog will helps the block to carry mortar and to get the strong bond with top laying block.

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