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