Concrete Insulation Blocks
01. TYPE OF INSULATION BLOCKS:
Block is a masonry unit which when used in its normal aspect exceeds the length or width or height dimensions of a Block. Insulation Blocks are slotted hollow blocks to give higher thermal resistance. It gives three times better heat insulation than normal concrete blocks & two time better heat insulation than clay blocks.
02. SIZE:
Following table gives the various sizes of blocks that we are manufacturing :-
| Length |
Height |
Thickness (Width) (mm) |
| 400 mm |
200 mm |
200mm 250mm |
| 190 mm |
190 mm |
190 |
| 290 mm |
190 mm |
190 |
Dimensional Deviation
The maximum dimensional deviation for blocks measured in accordance with the methods of test for Precast concrete blocks is as follows:-
| Dimension |
Maximum dimensional deviation |
| Length |
+3mm, -5mm |
| Height |
+3mm, -5mm |
| Thickness (Width) |
+/- 2mm average +/- 4mm at any individual point |
03. COMPRESSIVE STRENGTH:
The value of the crushing strengths of ten blocks tested in accordance with the method of test for Precast concrete blocks.
Blocks are tested for compressive strength in accordance with the specification of BS 6073. Table below gives the crushing strength of 10 blocks per consignment of 100 blocks.
| Type |
Minimum average |
Lowest Individual Block |
| 7.0 N/mm2 |
7.0 N/mm2 |
5.0 N/mm2 |
| 10.0 N/mm2 |
10.0 N/mm2 |
8.0 N/mm2 |
04. Extra SHELL THICKNESS
Table below give the minimum shell thickness of the blocks manufactured by Bahrain Blocks, that are in accordance with BS 6073.
| Type |
Minimum Shell thickness (mm) |
| 90x390x190 mm |
25.00 |
| 140x390x190 mm |
30.00 |
| 190x390x190 mm |
35.00 |
| 290x390x190 mm |
35.00 |
05. INSULATION MATERIAL:
Insulation used is 14kg/M3 expanded polystyrene sheet, which is inserted inside the cavity of slotted blocks. The insulation gives the heat resistance & isolates the inner and outer wall of blocks.
06. THERMAL PROPERTIES OF INSULATED BLOCKS:
- 8” Insulation Block
- Thermal Resistance R = 1.58 M² °C/W
- U-Value = 0.63 W/M² °C
- No. of Polystyrene in slot = 5 with 17 mm thickness
- 10” Insulation Block
- Thermal Resistance R = 2.50 M² °C/W
- U-Value = 0.40 W/M² °C
- No. of Polystyrene in slot = 4 with 30 mm thickness
