Development of Steel Fiber-Reinforced Expanded-Shale Lightweight Concrete with High Freeze-Thaw Resistance

Table 4

Specified minimum value of the DF.

Design service life	100 years		50 years		30 years
Environmental condition	Highly saturated	Moderately saturated	Highly saturated	Moderately saturated	Highly saturated	Moderately saturated
Severe cold area	0.80	0.70	0.70	0.60	0.65	0.50
Cold area	0.70	0.60	0.60	0.50	0.60	0.45
Partial freezing area	0.60	0.60	0.50	0.45	0.50	0.40