Influence of Eggshell Ash and Stone Powder on Geotechnical Properties of Expansive Clay in Dukem Town

Table 2

Summary of geotechnical properties of materials used for the study.

Geotechnical properties	Values			Standard methods
	Soil	ESA	SP
Natural moisture content (%)	26.68	NA	NA	ASTM D2216
Optimum moisture content (%)	35.78	NA	NA	ASTM D698
Maximum dry density (g/cm^3)	1.32	NA	NA	ASTM D698
Liquid limit (%)	84.38	18.95	16.49	ASTM D4318
Plastic limit (%)	37.22	16.03	NA	ASTM D4318
Plasticity index (%)	47.16	2.92	NA	ASTM D4318
Linear shrinkage (%)	21.96	2.38	1.55	BS 1377-2
Free swell index (%)	95	0.50	0.20	IS 2720-40
Free swell ratio (%)	1.95	1.01	1	IS 2720-40
% Finer of No. 200 sieve (%)	91.60	90	11.20	ASTM D6913
USCS soil classification	CH	ML	SW	ASTM D2487
AASHTO soil classification	A-7-5 (20)	A-4 (0)	A-3 (0)	AASHTO M145
Specific gravity, Gs	2.61	2.55	2.78	ASTM D854
UCS (kPa)	95	NA	NA	ASTM D2166
Compressibility index,	0.62	NA	NA	ASTM D2435
(Mpa^−1)	0.40	NA	NA	ASTM D2435
(m^2/year)	1.27	NA	NA	ASTM D2435
Color	Black	Dark gray	Dark silver	–