Damage and Degradation of Concrete under Coupling Action of Freeze-Thaw Cycle and Sulfate Attack

Table 7

Pore characteristics of concrete under different conditions after 150 coupling cycles.

Parameters	10% FA-2% N	0% FA-5% N	10% FA-5% N	20% FA-5% N	10% FA-10% N
Porosity (%)	12.1225	12.44	12.1653	15.9487	11.4801
Total pore volume (ml/g)	0.0561	0.058	0.0562	0.0788	0.0524
Total pore area (m^2/g)	5.161	6.25	4.954	7.349	4.233
Average pore size (nm)	43.5	37.1	45.4	42.9	49.6
Median pore diameter (volume/nm^3)	64.3	66.8	78.1	66.4	76.1
Median pore diameter (area/nm^2)	20.2	15.2	19	20	22.7