drying of concrete exercise 10. evaporation of water from k30 concrete evaporated water kg/m 3
TRANSCRIPT
Drying of concrete
Exercise 10
Evaporation of water from K30 concreteEv
apor
ated
wat
er k
g/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