V-Tec Structural floor beam - Concrete Foot C35
| Concrete Topping | Volume |
| 10m2 floor area 85mm thick | 1.0m3 |
| 10m2 floor area 100mm thick | 1.2m3 |
Concrete Mix
Typically the concrete is specified as a C25 pumpable mix of slump class S3 (target slump 190mm) with aggregate size 10mm.
A 20mm aggregate can be used but 10mm is preferred as it is easier to pump and place.
Chopped fibres can be used in the mix to improve the tensile strength of the concrete and as an anti-crack measure, dispensing with the need for a reinforcing mesh. The manufacturer will provide guidance as to the mix design.
Specification
| Concrete grade Spec 3 | C25 | C35 |
|---|---|---|
| Mix Type | F/F pump | F/F pump |
| Cement type | Cem 1/PC 42.5 | Cem 1/PC 42.5 |
| Standard aggregate size | 10mm | 10mm |
| Maximum aggregate size | 20mm | 20mm |
| Target slump | 190mm | 190mm |
| Minimum cement content | 350 | 375 |
Ready Mixed Concrete should be obtained from a plant approved by the quality scheme for ready mixed concrete. Visit www.qsrmc.co.uk