Evaluation of Carbonation Effects on Cement-Solidified Contaminated Soil Used in Road Subgrade

Table 4

Physical and mechanical properties of kaolin and sand.

Properties	Standard	Unit	Kaolin	Sand
Natural water content	JIS A 1203	%	2.90	0.39
pH	JGS 0211	—	4.70	7.50
EC	JGS 0212	mS/cm	0.42	0.06
Grain size distribution	GB/T50123-1999	—	—	—
Clay fraction (≤0.005 mm)	—	%	56.40	0.10
Silt fraction (0.075–0.005 mm)	—	%	18.80	2.98
Sand fraction (2–0.075 mm)	—	%	24.80	96.92
Correlation coefficient (R)	—	—	0.99	—
Specific surface area	—	m^2/g	29.41	—
Average pore size	—	nm	29.97	—
Total pore volume	—	cm^3/g	0.22	—