Drying of concrete Exercise 10. Evaporation of water from K30 concrete Evaporated water kg/m 3.

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Presentation transcript:

Drying of concrete Exercise 10

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

Drying time estimates:

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?

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

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

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