What is defective pointing?
Common Defects. All too often repointing is viewed as a cosmetic exercise. When done in a hard cement mortar, which is placed over the existing joint rather than in it, the incorrect pointing sits on the face of the stonework. This method results in a spiders web effect described as ‘strap’ pointing.
What is pointing on brickwork?
pointing, in building maintenance, the technique of repairing mortar joints between bricks or other masonry elements. When aging mortar joints crack and disintegrate, the defective mortar is removed by hand or power tool and replaced with fresh mortar, preferably of the same composition as the original.
What are the common defects of bricks?
Following are the different types of defects generally found in bricks:
- Over burning of bricks.
- Under burning of bricks.
- Bloating of bricks.
- Black core.
- Efflorescence.
- Brick cracking.
- Brick spalling.
- Chuffs.
What are defects in brick masonry?
Crystallization of salts from bricks: This defect commonly occurs in masonry made out of bricks which contain excessive soluble salts. When such bricks come in contact with water, the soluble salts get dissolved and appear in the form of fine whitish crystals on the surface of brickwork.
How do you know if mortar is bad?
Mortar in a state of failure will exhibit symptoms that allow a homeowner or inspector to identify the problem. These signs include disintegration, cracking, blistering or warping of the mortar.
What causes pointing to crack?
Drying is just the process of moisture leaving the mortar, whereas carbonation is the absorption of Co2 from the atmosphere and this is how the mortar gains its strength. If pointing dries before sufficient carbonation has taken place then cracking can occur.
What are types of pointing?
Types Of Pointing
- Beaded pointing.
- Flush pointing.
- Recessed pointing.
- Rubbed or keyed or grooved pointing.
- Struck pointing.
- Tuck pointing.
- Vee – pointing.
- Weathered pointing.
What are the different types of pointing?
Types of Pointing
- Flush Pointing.
- Weathered Pointing.
- Keyed Pointing.
- V-Grooved Pointing.
- Beaded Pointing.
- Struck Pointing.
- Recessed Pointing.
- Tuck Pointing.
How do you know if brick is bad?
A good quality of bricks should be well burnt and have a colour of rich red or Copper colour, any other colour other than above resembles that brick is under burnt or over-burnt. If bricks are over or under-burnt, then it loses it shape.
How can brickwork fail?
The main cause of failures is rusting of metal ties, although there can be other causes, such as failure to properly bed the tie in the mortar joint, poor quality mortar reducing the bond between tie and mortar, or not installing the requisite number of ties.
What is blistering in brick?
Blisters. Blisters occur due to air imprisoned in brick during moulding.
Which defect is required immediately maintenance repair in brick masonry building?
| Q. | In a brick masonry structure the following defects are noticed during inspection. Which one ofthem requires immediate maintenance repair? |
|---|---|
| B. | Growth of vegetation |
| C. | Structure failure by settlement |
| D. | Falling of plaster |
| Answer» c. Structure failure by settlement |