Strength and Microscopic Characteristics of Slag-Based Geopolymer-Solidified Sludge after Dry–Wet Cycling with Chloride Salt Solutions

Table 3

Dry–wet cycle test program.

Number	Alkali exciter	Curing age (day)	NaCl solution concentration (%)	Na2SO4 solution concentration (%)	Number of dry–wet cycles
NO	NaOH	7, 14, 28	0, 5, 10	0	0, 5, 10, 20, 30
NS	Na2SiO3	28
CS	Calcium carbide slag	28
NO	NaOH	28	0	5