Standard infill blocks used to infill between the beams can have densities ranging from 600kg/m³ to 2000kg/m³ to suit thermal or sound requirements.
We note on our quotation the maximum density block to be used with our floor beams, relative to you particular project. It is crucial you stay within these limits, as heavier blocks will create an additional weight to be carried by the floor beams, which could ultimately cause the floor to fail. If you intend to use a heavier block other than stated on our quotation please contact us.
The advantage of using lighter weight blocks is that the dead load on the floor is reduced; enabling greater spans for the same imposed loads to be achieved.
There are two main advantages to using a dense concrete blocks for infilling, these would be; greater sound resistance and an increased thermal mass capacity.
Infill blocks should be 100mm thick with a compressive strength of 3.5N/mm² or 7.0N/mm² and be able to support a minimum transverse load of 3.5kN on a 420mm span.
Where blocks are built into loadbearing walls the compressive strength must be equal to or greater than that of the blocks used in the wall construction. For garage floor applications, blocks with 7.0N/mm² compressive strength.
Reference; British Standard: Precast Concrete Products – Beam and Block floor systems. Part 2: Concrete Blocks.