Question

Student ID: Determine the design subgrade Resilient Modulus for below given data using figure # Q3. Mr values (in psi) at different test locations are: 12500, 13000, 7600, 6300, 5900, 11900, 9700 and 5400 (Assume the traffic level ESAL is 100000). (20 points) Design Mr 120 T C 100 9 80 60 40 E 20 2 2000 4000 6000 8000 10000 12000 14000 16000 Mr (psi) Figure # 01: Determination of design Mr

Answer 1

Ans ) For ESAL = 100000, design M_R is equal to Modulus value that is smaller than 75% of all the test values.Now consider below table:

Test value	Number equal to or greater than	Percent equal to or greater than
13000	1	12.5
12500	2	25
11900	3	37.5
9700	4	50
7600	5	62.5
6300	6	75
5900	7	87.5
5400	8	100

Now plot the graph as follows:

From above figure, we can see that Resilient Modulus corresponding to 75% value is 6300 psi .Hence,

60 to 1 6 300 Ч. 6,8,lo 12 ty 18

M_R = 6300 psi