G MS THESIS_final version_Maxim Prokudin.pdf - Digital Repository ...

7710080LL = 31PI = 7Pass. #200 = 98%Class. MLPercent finer, %60402001001010.10.010.001Western Iowa loessAASHTO No.57 aggregate1/10 th scale RAPlimestone aggregateSand materialGrain size, mmFigure 46: Particle size distribution for loess, full and 1/10 th scale AASHTO No. 57, andsand materialsAs a consequence, a much higher level of energy, mechanical energy and compaction wasdelivered to the soil in the test bed at the moisture content significantly lower than theoptimum, which resulted in reduced level of compaction and lower density. As it can be seenin Figure 44, the corresponding point plotted for the initial test soil conditions appearedbelow the Standard Proctor Curve. Moreover, the results of Unconfined Compression (UC)test confirmed the undrained shear strength to be 120 kPa (Table 18). Knowing the typicalsoil conditions where full-scale aggregate piers are of best performance, the undrained shearstrength values were expected to be closer to 30 kPa which was considerably lower than theproduced 120 kPa.