# Design compressive strength of lightweight aggregated concrete: the coefficient `α`_{lcc}

_{lcc}

## Eurocode 2 part 1-1: Design of concrete structures 11.3.5 (1)P

The value of the design compressive strength is defined as:

f = _{lcd}α _{lcc}f / _{lck}γ_{C} | (11.3.15) |

where:

`γ`_{C}- is the partial safety factor for concrete, see § 2.4.2.4 (1), § 2.4.2.4 (2) and § 2.4.2.4 (3)
`α`_{lcc}- is a coefficient according to § 3.1.6 (1)P (the coefficient taking account of long term effects on on the compressive strength and of unfavourable effects resulting from the way the load is applied).

## Recommendation

The recommended value of `α _{lcc}` is 0,85