Within the confines of this paper, a normalized deformation based capacity mobilization assessment scheme is presented for rammed aggregate piers (RAP). For this purpose, field load tests, performed on 63 RAPs in Turkey were assessed. Site investigations at these sites revealed that generalized soil profiles are mostly composed of normally consolidated clay layers extending to a depth of 18m. Below this depth, usually medium dense to dense sand / hard greywacke / very stiff to hard clay are present. A weighted arithmetic mean SPT N 60 assessment procedure was used to estimate representative soil strength and stiffness parameters in cohesive soils. The results of RAP load tests were summarized in the form of normalized mobilized capacity versus settlement curves as functions of representative SPT N 60 values. The normalized field load test database revealed that: i) the shaft resistance is observed to be fully mobilized at normalized displacements of 40 percent of RAP diameter for very soft clays to 10 percent for relatively stiffer clays, ii) upto normalized displacements of 2-5% of RAP diameter, 30-50% of the shaft resistance capacity is mobilized in a rather linear elastic manner, iii) normalized capacity mobilization response of RAPs is softer than the ones of bored concrete piles, iv) under compressive loads RAPs exhibit a strain hardening response, as a result of which the design-basis capacity is dominated by allowable settlement criterion.