Optimum Design and Performance of Porous Concrete for Heavy-Load Traffic Pavement in Cold and Heavy Rainfall Region of NE China

Table 11

The possible frost-thawing cycle times of porous concrete in working environment.

Goal porosity (%)	Annual average temperature difference of base (°C)	The number of annual freeze-thawing cycles that may be experienced (times)	The number of freeze-thawing cycles that may be experienced during the design period (times)	The maximum number of freeze-thawing cycles that a porous concrete can stand in design period (times)
15	45	51	765	780
20				480
25				420
30				120