Table 10.

pH values of marble-based geopolymer concrete.

Item No.	pH Value
	7 Days	14 Days	28 Days	56 Days	90 Days	180 Days	365 Days
CM5S5-O	12.2	11.9	11.8	11.4	11.2	11.0	10.8
CM5S5-DM	12.1	11.8	11.7	11.2	10.9	10.7	10.4