Blocks
IS 2185 (Part 1): Hollow & Solid Concrete Blocks
Key technical information and requirements related to Hollow & Solid Concrete Blocks from IS 2185:2005.
IS 2185 (Part 1): 2005 HOLLOW AND SOLID CONCRETE BLOCKS – SPECIFICATION
Key Information
DIMENSIONS
The nominal dimensions of concrete block shall be as follows:
Length: 400, 500 or 600 mm
Height: 200 or 100 mm
Width: 50, 75, 100, 150, 200, 250 or 300 mm.
In addition, block shall be manufactured in half lengths of 200, 250 or 300 mm to correspond to the full lengths.
TOLERANCES
Length: ≤ +/- 5mm
Height & Width: ≤ +/- 3mm.
PHYSICAL REQUIREMENTS
| Type | Grade | Density of Block kg/m3 |
Minimum Average Compressive Strength of Units N/mm2 |
Minimum Compressive Strength of Individual Units N/mm2 |
|---|---|---|---|---|
| Hollow (open and closed cavity) load bearing unit | A (3.5) | ≥ 1500 | 3.5 | 2.8 |
| Hollow (open and closed cavity) load bearing unit | A (4.5) | ≥ 1500 | 4.5 | 3.6 |
| Hollow (open and closed cavity) load bearing unit | A (5.5) | ≥ 1500 | 5.5 | 4.4 |
| Hollow (open and closed cavity) load bearing unit | A (7.0) | ≥ 1500 | 7.0 | 5.6 |
| Hollow (open and closed cavity) load bearing unit | A (8.5) | ≥ 1500 | 8.5 | 7.0 |
| Hollow (open and closed cavity) load bearing unit | A (10.0) | ≥ 1500 | 10.0 | 8.0 |
| Hollow (open and closed cavity) load bearing unit | A (12.5) | ≥ 1500 | 12.5 | 10.0 |
| Hollow (open and closed cavity) load bearing unit | A (15.0) | ≥ 1500 | 15.0 | 12.0 |
| Hollow (open and closed cavity) load bearing unit | B (3.5) | 1100 - 1500 | 3.5 | 2.8 |
| Hollow (open and closed cavity) load bearing unit | B (5.0) | 1100 - 1500 | 5.0 | 4.0 |
| Solid load bearing unit | C (4.0) | ≥ 1800 | 4.0 | 3.2 |
| Solid load bearing unit | C (5:0) | ≥ 1800 | 5.0 | 4.0 |
Water Absorption: ≤ 10 %
Drying Shrinkage: ≤ 0.06%
Moisture Movement: ≤ 0.09 %
SAMPLING
A sample of 20 blocks shall be taken from every lot/consignment of 5000 blocks or part thereof from the same grade, size, and batch of manufacture.
(For further details please refer to the Standard)
