| Our Products |
|
| |
| Our services |
|
| |
| BRICKS |
| List of Indian Standards for Testing of Bricks
IS : 3495-1976 - Method of test for Burnt Clay Building Bricks
IS : 1077-1976 - Specification for common Burnt Clay Building Bricks
Bricks are the only man-made building materials that testify to their use since the early human civilization. With their attractive appearances and superior properties such as high compressive strength and durability, excellent fire and weather resistance, good thermal and sound insulation, bricks are widely used for building, civil engineering work, and landscape design. |
 |
|
| |
| Water Absorption: |
| |
|
The amount of water that a brick can absorb is measured by the cold water absorption test. There is no distinct
relationship between water absorption and the water-tightness of walls. The results of water absorption tests
are used by the brick manufacturer for quality assurance.
|
| |
|
|
 Compressive Strength:
| |
|
Bricks are well-known for their high compressive strength. Their compressive strength depends on:
1. the raw materials used,
2. the manufacturing process, and
3. the shape and size.
Bricks made by a de-aerated extruder and fired to sufficiently high temperature can easily with stand a compressive pressure exceeding 28 N/mm2 (4,000 psi). They are suitable for almost all structural building applications. A wide range of bricks is available in this country. Bricks vary in compressive strength due to the differing qualities of raw material and the method of firing.
The compressive strengths can range from 3,5MPa for NFP, to greater than 50MPa for face brick extra and engineering products. Standard testing is carried out on a sample of 12, to prescribed procedures. Local manufacturers should be able to meet specific needs. Modern methods of manufacture produce bricks with consistent qualities, but bricks are made from naturally occurring materials and the compressive strength of individual bricks in a given batch inevitably varies.
NOTE : The compressive strength of clay bricks is not always indicative of their durability. Clay products for load-bearing designs can be provided to suitable close tolerances and strength.
|
| |
|
Measurement And Quality:
| |
|
The most commonly used and manufactured brick size is the "Imperial Brick". It is 222 mm long x 106 mm wide x 73 mm high with a mass between 3 and 3,5 kg, depending on the materials used.
Sizes of bricks and blocks are made by individual manufacturers. Various combinations of dimensions in millimetres are:
 Length: 220 190 222 290 390
Width: 110 106 140 150 190
Height: 73 90 114 190 90
|
| |
|
Efflorescence:
| |
|
Efflorescence is a phenomenon that soluble slats dissolved in water are carried, deposited and gradually accumulated on brick surfaces to form an unsightly scum. The soluble salts may be originated from the raw material of bricks. But in most cases, efflorescence is caused by salts from the external sources such as ground water, contaminated atmosphere, mortar ingredients and other materials in contacts with the bricks.
Degree of efflorescence:
- Nil: no perceptible deposit of salts;
- Slight: a very thin deposit of salts, just perceptible, or a small quantity of salts occurring only on the edges of a unit;
- Moderate: a deposit heavier than "slight", but that has not caused powdering or flaking of the surface;
- Heavy: a thick deposit of salts covering a large area of the unit, but that has not caused powdering or flaking of the surface; and
- Serious: a deposit of salts that has caused powdering or flaking of the surface.
|
| |
|
|
|
| |
]
 |
|
|
