Polat Helbo posted an update 1 month, 3 weeks ago
Concrete block masonry also is known as concrete masonry unit (CMU) have advantages over brick and stone masonry.
Concrete blocks are designed in required shape and sizes and these could possibly 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, 10 inch and 12-inch unit configurations.
Cement, aggregate, water can be 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 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 structure, shape, size and manufacturing processes concrete blocks are mostly classified into 2 types and they are generally:
Solid concrete blocks
Hollow concrete Blocks
Solid Concrete Blocks
Solid concrete blocks are normally used, which are heavy in weight and produced from dense aggregate. They are very good and offers good stability on the structures. So for big work of masonry like for load bearing walls these solid blocks are preferable. These come in large sizes compared to bricks. So, it will require much less time to make 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 must be more than 50%. The hollow part could be split into several components determined by our requirement. They’re constructed from lightweight aggregates. They are transportable blocks and straightforward to set up.
Kinds of Hollow Concrete Blocks:
Frogged brick block
Concrete Stretcher Blocks
Corner blocks are used on the ends or corners of masonry. The ends could be window or door openings etc. these are arranged in a way that their plane end visible external and also other end is locked using the stretcher block.
Concrete Corner Blocks
Corner blocks are used on the ends or corners of masonry. The ends may be window or door openings etc. they may be arranged in a fashion that their plane end visible external and also other end is locked with all the stretcher block.
Concrete Pillar Blocks
Pillar block can be recognized as double corner block. Generally they’re used when two ends in the corner are visible. In the event of piers or pillars these blocks are traditionally used.
Jamb Concrete Blocks
Jamb blocks are widely-used should there be an elaborated window opening from the wall. These are linked to stretcher and corner blocks. To the provision of double hung windows, jamb blocks are extremely beneficial to provide space for that casing individuals window.
Partition Concrete Block
Partition concrete blocks are usually employed to build partition walls. Partition blocks have larger height than its breadth. Hollow part is split into 2-3 components in the event of partition blocks.
Lintel block or beam block is employed when considering provision of beam or lintel beam. Lintel beam is mostly provided on top percentage of windows and doors, which bears the load via top. Concrete lintel blocks have deep groove down the length 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 together with header and stretcher like frogged brick. This frog will helps the block to hold mortar and also to enjoy the strong bond with top laying block.
Bullnose Concrete Block
Bullnose blocks are like corner blocks. Their duties also same however, if we would like rounded edges at corner bullnose bricks are preferred.
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