Brick Masonry Definition
Brick masonry is a highly durable form of construction. It is built by placing bricks in mortar in a systematic manner to construct solid mass that withstand exerted loads. There are several types of bricks and number of mortars which can be used to construct brick masonry.
The bond in brick masonry, which adheres bricks together, is produced by filling joints between bricks with suitable mortar. Special cautions shall be practiced while mortar is mixed and placed since it greatly affect the performance and durability of masonry structure.
Types of Brick Masonry Work
1. Brick Work in Mud
- The mud is used to fill up various joints brick masonry work.
- Thickness of the mortar joint is 12 mm.
- it is the cheapest type of brick masonry
- employed for construction of walls with maximum height of 4 m.
2. Brick Work in Cement
This type of brick masonry is construction by laying bricks in cement mortar rather than mud which is used in brick work in mud. There are three major classes of brick work in cement which are summarized in Table 1.
Table 1 Different classes of brick work in cement and their descriptions
Types of Bricks
There are different types of brick used in the construction of brick masonry which include:
- Common Burnt Clay Bricks
- Concrete Bricks
- Sand Lime Bricks (Calcium Silicate Bricks)
- Fly ash Clay Bricks
- Engineering Bricks
- Other Brick Types include bullnose, channel, coping, cownose and hollow bricks.
Brick Masonry Construction
Materials and Equipment Used in Brick Masonry Construction
- Mortar Mix or Mason Mix Bricks
- Tape measure
- Hose, level, or theodolite
- Trowel Level
- And other equipment according to project ans personal preferences
Brick Masonry Construction Preparations
- Check the level of the ground using level, theodolite or transparent hose level.
- Set the layout of the structure.
- Trace of building axis and wall alignment using gypsum powder, chalk, or similar, marking the trenches for foundation.
- After that,install foundation wall, cure foundation for minimum two days before beginning of brick masonry construction.
- Distribute bricks in several stacks along project site to cut time and effort later.
- Wet bricks few hours prior to the work. Not only does this avoid absorbing too much water from mortar but also improve adherence of bricks and mortar.
Brick Masonry Construction Procedure
- Initially, mix the mortar with water and blend it until a smooth and plastic mortar is produced.
- After that, place the mortar on foundation line evenly using trowel (25mm thickness and one brick wide is recommended for laid mortar).
- Then, lay the first course of stretcher bricks in the mortar. Start with second brick, apply mortar to the head joint end of each brick, After that shove the bricks into place firmly so that the mortar is squeezed out of all side of the joints.
- Utilize a level to examine the course for correct height. ensure that bricks are plumb and level.
- Place another mortar line alongside the first course, then begin laying the second course.
- Use the two half bricks to begin the second to ensure that the first two courses are staggered for structural purposes.
- To finish the second course of the lead, lay three header bricks and make sure that they are plumb and level.
- The third and fifth courses consists of stretchers similar to the first course. The fourth course begins with single header, followed by stretchers. Use the level to make sure that the lead is true on each course. Lastly, this pattern of brick laying is used till the target height is reached.
Points Considered in Supervising Brick Masonry Constructions
The following points should be observed in the construction of brick masonry:
- Use good quality bricks.
- Ensure that brick courses are perfectly horizontal.
- Verticality of the wall should be ensured by frequently checking with plumb-bob.
- Whenever work is stopped brick masonry should be left with toothed end.
- Use of brick bats should be avoided.
- Raising walls by more than 1.5 m in one day shall be prevented.
- Raise face joints to a depth of 12 to 20mm so as to be used as a key for plastering or pointing.
- Brick masonry should be regularly cured for 2 weeks.
- The thickness of mortar joints shall be 10 mm both horizontally and vertically.