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From page 3... ... 3 CHAPTER 2. SYNTHESIS OF CURRENT KNOWLEDGE This chapter presents the results of the literature review conducted on the causes of the problems pointed out in Chapter 1 and current solutions that target the identified causes. Read the entire page →
From page 4... ... 4 Table 1. Inputs from Unbound Layers and Subgrade in Pavement ME Design. Read the entire page →
From page 5... ... 5 However, recent investigations indicate that the performance predicted by Pavement ME Design generally shows low or no sensitivity to these underlying layers. A recent study conducted in the NCHRP Project 01-47 (2) Read the entire page →
From page 6... ... 6 Table 2. Influential Factors of Unbound Layers on Performance of Flexible Pavements. Read the entire page →
From page 7... ... 7 Table 3. Influential Factors of Unbound Layers on Performance of Rigid Pavements. Read the entire page →
From page 8... ... 8 Table 4. Influential Factors of Subgrade on Performance of Flexible Pavements. Read the entire page →
From page 9... ... 9 Table 5. Influential Factors of Subgrade on Performance of Rigid Pavements. Read the entire page →
From page 10... ... 10 UNBOUND LAYER AND SUBGRADE MODELS FOR PERFORMANCE INFLUENCE Table 2 to Table 5 demonstrate various characteristics of unbound layers and subgrade that affect the performance of flexible and rigid pavements. Based on these results, researchers searched and identified the ME models that address such influence. Read the entire page →
From page 11... ... 11 Table 6. Modulus Models of Unbound Layers and Subgrade. Read the entire page →
From page 12... ... 12 Moisture-sensitive and Stressdependent Model 2 3 1 1 k k w m oct R a a a M k P P P                 Subgrade Soil (61) Moisture-sensitive and Stressdependent Model ' 2 4 4 ' 1 3 1 1o k k k m mnet w sat oct R a a a a uM k P P P P                         Granular Base (19) Read the entire page →
From page 13... ... 13 Empirical Regression Model for MR  0.642555rM CBR Granular Base/ Subgrade Soil (66) Empirical Regression Model for MR 1155 555rM R  Granular Base/ Subgrade Soil (66) Read the entire page →
From page 14... ... 14 Stressdependent ME Model max D fB C p dAN            Granular Base (11) Stressdependent ME Model    0 2 1 m nN p e J I K           Granular Base (73) Read the entire page →
From page 15... ... 15 Table 8. Shear Strength Models of Unbound Layers and Subgrade. Read the entire page →
From page 16... ... 16 Table 9. Erosion Models of Unbound Layers. Read the entire page →
From page 17... ... 17 Table 11. Thickness Sensitive Models of Unbound Layers. Read the entire page →

From page 3...

... 3 CHAPTER 2. SYNTHESIS OF CURRENT KNOWLEDGE This chapter presents the results of the literature review conducted on the causes of the problems pointed out in Chapter 1 and current solutions that target the identified causes.