Activity

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

Concrete blocks are designed in required shape and sizes and these could be solid or hollow blocks.

The common size 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 is employed 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 about 3N/mm2. ASTM C-90-91 specifies the compressive strength requirements of concrete masonry units.

Types of Concrete Blocks or Concrete Masonry Units

Dependant on the dwelling, shape, size and manufacturing processes concrete blocks are generally 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 made of dense aggregate. They’re strong and provides good stability for the structures. So for large work of masonry like for load bearing walls these solid blocks are preferable. They are available in large sizes in comparison with bricks. So, it will require a shorter time to construct concrete masonry than brick masonry.

Hollow Concrete Blocks

Hollow concrete blocks contains void area in excess of 25% of gross area. Solid area of hollow bricks must be a lot more than 50%. The hollow part might be split into several components depending on our requirement. They are made of lightweight aggregates. They may be lightweight blocks as well as simple to install.

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 used in the ends or corners of masonry. The ends may be door or window openings etc. they are arranged in a way that their plane end visible facing outward as well as other end is locked with all the stretcher block.

Concrete Corner Blocks

Corner blocks are widely-used in the ends or corners of masonry. The ends may be door or window openings etc. they are arranged in a way that their plane end visible out as well as other end is locked with all the stretcher block.

Concrete Pillar Blocks

Pillar block can be called as double corner block. Generally they’re used when two ends from the corner are visible. In the case of piers or pillars these blocks are trusted.

Jamb Concrete Blocks

Jamb blocks are employed when there is an elaborated window opening in the wall. They are connected to stretcher and corner blocks. For that provision of double hung windows, jamb blocks are incredibly helpful to provide space for your casing members of window.

Partition Concrete Block

Partition concrete blocks are generally utilized to build partition walls. Partition blocks have larger height than its breadth. Hollow part is split into 2-3 components in the case of 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 the top area of windows and doors, which bears the strain originating from top. Concrete lintel blocks have deep groove over the duration 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 posesses a frog on its top in addition to header and stretcher like frogged brick. This frog will helps the block to hold mortar and also to develop the strong bond with top laying block.

Bullnose Concrete Block

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

Check out about con ke thep san check our site