• Timmons Sellers posted an update 1 year, 5 months ago

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

    Concrete blocks are designed in required shape and sizes that might be solid or hollow blocks.

    The common 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 can be 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 approximately 3N/mm2. ASTM C-90-91 specifies the compressive strength requirements of concrete masonry units.

    Kinds of Concrete Blocks or Concrete Masonry Units

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

    Solid concrete blocks

    Hollow concrete Blocks

    Solid Concrete Blocks

    Solid concrete blocks are generally used, that are heavy in weight and produced from dense aggregate. They are very good and gives good stability on 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 take a shorter period to develop concrete masonry than brick masonry.

    Hollow Concrete Blocks

    Hollow concrete blocks contains void area greater than 25% of gross area. Solid part of hollow bricks needs to be over 50%. The hollow part could be divided into several components according to our requirement. These are produced from lightweight aggregates. They are transportable blocks and simple to put in.

    Forms 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 utilized with the ends or corners of masonry. The ends could possibly be door or window openings etc. they may be arranged in a fashion that their plane end visible external along with other end is locked using the stretcher block.

    Concrete Corner Blocks

    Corner blocks are utilized with the ends or corners of masonry. The ends could possibly be door or window openings etc. they’re arranged in a manner that their plane end visible to the outside as well as other end is locked using the stretcher block.

    Concrete Pillar Blocks

    Pillar block is also called as double corner block. Generally these are generally used when two ends of 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 within the wall. They are attached to stretcher and corner blocks. For that provision of double hung windows, jamb blocks are extremely helpful to provide space for the casing folks window.

    Partition Concrete Block

    Partition concrete blocks are likely to be utilized to build partition walls. Partition blocks have larger height than its breadth. Hollow part is divided into two to three components in case there is partition blocks.

    Lintel Blocks

    Lintel block or beam block is utilized when considering provision of beam or lintel beam. Lintel beam is generally provided on the top percentage of windows and doors, which bears the strain coming from top. Concrete lintel blocks have deep groove down 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 contains a frog on its top in addition to header and stretcher like frogged brick. This frog will helps the block to keep mortar and also to provide the strong bond with top laying block.

    Bullnose Concrete Block

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

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