Different Types Of Concrete Blocks Or Concrete Masonry Units Used In Building Construction
Concrete block masonry also is called concrete masonry unit (CMU) have advantages over brick and stone masonry.
Concrete blocks are made in required shape and sizes that may be solid or hollow blocks.
The most popular sized 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 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 approximately 3N/mm2. ASTM C-90-91 specifies the compressive strength requirements of concrete masonry units.
Varieties of Concrete Blocks or Concrete Masonry Units
Based upon the structure, 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're quite strong and supplies good stability for the structures. So for big work of masonry like for load bearing walls these solid blocks are preferable. One can choose from large sizes compared to bricks. So, it will take less time to construct concrete masonry than brick masonry.
Hollow Concrete Blocks
Hollow concrete blocks contains void area more than 25% of gross area. Solid area 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 may be lightweight blocks and easy to set up.
Forms of Hollow Concrete Blocks:
Frogged brick block
Concrete Stretcher Blocks
Corner blocks are employed on the ends or corners of masonry. The ends might be window or door openings etc. they are arranged in a fashion that their plane end visible facing outward along with other end is locked with the stretcher block.
Concrete Corner Blocks
Corner blocks are employed in the ends or corners of masonry. The ends could be door or window openings etc. they are arranged in ways that their plane end visible external and also other end is locked with all the stretcher block.
Concrete Pillar Blocks
Pillar block is additionally called as double corner block. Generally these are generally used when two ends from the corner are visible. In case there is piers or pillars these blocks are traditionally used.
amb Concrete Blocks
Jamb blocks are employed if you have an elaborated window opening inside the wall. They are linked to stretcher and corner blocks. For that provision of double hung windows, jamb blocks have become helpful to provide space for that casing members of window.
Partition Concrete Block
Partition concrete blocks are likely to be used to build partition walls. Partition blocks have larger height than its breadth. Hollow part is split into 2 to 3 components in case of partition blocks.
Lintel block or beam block is utilized when it comes to provision of beam or lintel beam. Lintel beam is generally provided in the top percentage of doors and windows, which bears the stress via 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 as well as reinforcement.
Frogged Brick Blocks
Frogged brick block posesses a frog on its top together with header and stretcher like frogged brick. This frog will helps the block to hold mortar and develop 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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