Heavy Metal Leaching, CO2 Uptake and Mechanical Characteristics of Carbonated Porous Concrete with Alkali-Activated Slag and Bottom Ash

International Journal of Concrete Structures and Materials

Table 10 Open and closed void ratios of porous concretes.

	Exposure condition (CO₂, %)	NS1	NS2	NS3	SS1	SS2	SS3	PC2
V _open (%)	–	31	30	20	39	32	24	32
	5	33	35	23	42	37	29	33
	10	29	28	18	36	32	20	28
V _close (%)	–	9	9	15	7	6	8	5
	5	4	4	6	3	4	4	5
	10	5	5	7	3	4	5	4