Evaluation of Resilient Modulus of Subgrade and Base Materials in Indiana and Its Implementation in MEPDG

Table 8

Correlation between MEPDG inputs and soil properties at OMC.

Soil type	A4			A-6			A-7-6
MEPDG inputs	𝑘1	𝑘2	𝑘3	𝑘1	𝑘2	𝑘3	𝑘1	𝑘2	𝑘3
ADDO	15.2755	−0.0537	0.05003	−10.373	−0.01986	−0.01523	40.4804	−0.09401	0.13677
AMCO	102.276	0.38034	0.53396	−160.526	0.01833	−0.00001	−71.9733	0.41507	−0.16641
CLAY	15.5439	−0.00158	−0.00486	−1.23003	−0.00484	0.00908	13.5356	0.06418	−0.03009
GRAVEL	11.5423	−0.00577	−0.01169	−1.41065	−0.01011	0.01576	14.7768	0.0352	−0.02735
LL	−2.68004	0.05675	0.04337	14.3789	−0.00358	−0.00555	3.28479	−0.02432	0.00768
MDD	−30.39	0.07329	−0.11358	0.66964	0.02925	0.00598	−46.8996	0.0268	−0.11805
OMC	−127.734	−0.41051	−0.68651	123.671	−0.01324	−0.02212	43.007	−0.50741	0.18766
PI	−14.5558	0.03855	0.025	6.63765	−0.00985	0.01139	5.8166	0.02229	−0.00922
SAND	12.5928	0.01153	−0.00194	4.59136	−0.00646	0.0116	15.0582	0.09066	−0.03127
SILT	10.2289	0.00322	−0.00836	2.00541	−0.00263	0.00892	19.0182	0.07255	−0.02671
SG	562.592	−1.38553	3.25546	469.806	−0.06798	0.06054	−115.307	0.81695	0.15138
𝑅^2	0.97	0.92	0.93	0.95	0.88	0.79	0.99	0.90	0.95

Note: CLAY = particles smaller than 0.002 mm.
GRAVEL = particles from 3 in (75 mm) to NO 10 (2 mm) sieve.
SAND = particles from passing NO 10 (2 mm) to NO 200 (75 μm) sieve.
SILT= particles from 0.075 to 0.002 mm.