Experimental and Stress-Strain Equation Investigation on Compressive Strength of Raw and Modified Soil in Loess Plateau

Table 3

Mean compressive strength and peak strain.

Modified soil	Raw soil	Cement			Lime			Sand			Straw
		4%	8%	12%	5%	10%	15%	5%	15%	25%	0.5%	1.0%
Cracking load/kN	13.82	18.13	32.54	33.29	12.95	12.67	11.98	15.47	16.26	15.33	10.89	10.24
Ultimate load/kN	25.32	34.88	43.86	53.49	25.32	25.24	25.40	37.00	37.65	36.91	25.56	24.99
Ultimate compressive strength/MPa	3.10	4.27	5.37	6.55	3.10	3.09	3.11	4.53	4.61	4.52	3.13	3.06
Variation coefficient/%	19.47	9.94	12.89	8.11	11.43	9.07	6.15	10.85	7.39	3.77	7.45	8.04
Peak strain/%	2.02	2.04	2.08	1.90	1.67	2.08	2.63	2.12	2.33	2.69	2.97	4.23