1. Drying of concrete Exercise 10

3. Evaporation of water from K30 concrete Evaporated water kg/m 3

4. Drying time estimates:

5. 90 mm thick ground slab: made of K30 concrete, has not been wetted but has been wet cured for 2 weeks Drying environment: 18 °C/ RH50 % When is RH of 85 % reached?

6. Drying time = basic dying time * w/c ratio * thickness * moisture of the foundation * wetting time * drying conditions

8. Drying time = basic dying time 17 weeks * w/c ratio factor 1,0 * thickness factor 1,4 * moisture of the foundation factor 1,0 * wetting time 1,0 * drying conditions 0,9 ≈ 21 weeks