11.8 For a mean annual air temperature of 45°F and a normal modulus of 22,500 psi, determinethe effective roadbed soil resilient modulus for the monthly moduli shown in Table 11.10[Answer: 22,200 psi]TABLE 11.10 Subgrade Modulus Used in the DAMA ProgrammodulusSubgrade modulus by month (10 psi)NormalMAAT(psi)DecJanFebMarAprMay JunJulAugSep OctNov45°F45004.527.350.01.622.343.063.784.54.50.96.012,00012.031.050.07,208.409.6010.812.012.0(7°C)22,50022.536.350.015.817.118.519.821.222.522.560°F45004.527.31.352.143.714.54.54.512,00012.031.07.28.410.812.012.012.0(15.5°C)22,50022.538.318.019.121.422.522.522.5-Note. 1 psi 6.9 kPa.Source. After AI (1982).15.921.529.44.512.022.538.740.543.150.050.050.02.939.620.34.512.022.5

Given, Normal modulus= 22,500 psi

11.8 For a mean annual air temperature of 45°F and a normal modulus of 22,500 psi, determine the effective roadbed soil resilient modulus for the monthly moduli shown in Table 11.10 [Answer: 22,200 psi] TABLE 11.10 Subgrade Modulus Used in the DAMA Program modulus Subgrade modulus by month (10 psi) Normal MAAT (psi) Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 45°F 4500 4.5 15.9 27.3 50.0 0.9 1.62 2.34 3.06 3.78 4.5 12,000 12.0 21.5 31.0 50.0 6.0 7.20 8.40 9.60 10.8 12.0 (7°C) 22,500 22.5 29.4 36.3 50.0 15.8 17.1 18.5 19.8 21.2 22.5 60°F 4500 4.5 4.5 27.3 1.35 2.14 2.93 3.71 4.5 4.5 12,000 12.0 31.0 7.2 8.4 9.6 10.8 12.0 12.0 (15.5°C) 22,500 22.5 38.3 18.0 19.1 20.3 21.4 22.5 22.5 Note. 1 psi - 6.9 kPa. Source. After AI (1982). 12.0 22.5 38.7 40.5 43.1 50.0 50.0 50.0 4.5 12.0 22.5 4.5 12.0 22.5 4.5 12.0 22.5

11.8 For a mean annual air temperature of 45°F and a normal modulus of 22,500 psi, determine the effective roadbed soil resilient modulus for the monthly moduli shown in Table 11.10 [Answer: 22,200 psi] TABLE 11.10 Subgrade Modulus Used in the DAMA Program modulus Subgrade modulus by month (10 psi) Normal MAAT (psi) Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 45°F 4500 4.5 15.9 27.3 50.0 0.9 1.62 2.34 3.06 3.78 4.5 12,000 12.0 21.5 31.0 50.0 6.0 7.20 8.40 9.60 10.8 12.0 (7°C) 22,500 22.5 29.4 36.3 50.0 15.8 17.1 18.5 19.8 21.2 22.5 60°F 4500 4.5 4.5 27.3 1.35 2.14 2.93 3.71 4.5 4.5 12,000 12.0 31.0 7.2 8.4 9.6 10.8 12.0 12.0 (15.5°C) 22,500 22.5 38.3 18.0 19.1 20.3 21.4 22.5 22.5 Note. 1 psi - 6.9 kPa. Source. After AI (1982). 12.0 22.5 38.7 40.5 43.1 50.0 50.0 50.0 4.5 12.0 22.5 4.5 12.0 22.5 4.5 12.0 22.5

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter2: Origin Of Soil And Grain Size

Section: Chapter Questions

Problem 2.14P: A hydrometer test has the following result: Gs = 2.65, temperature of water = 26 C, and L = 10.4 cm...

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