The objective of this research was to study how the resilient modulus and unconfined compressive strength of soils stabilized with fly ash change after freeze-thaw cycling. To reach this objective, resilient modulus and unconfined compression tests were conducted on a range of fly ash stabilized materials after freeze-thaw cycling (0, 1, 3, 5, 10, and 12 cycles). The stabilized materials tested included fine-grained soil, coarse-grained soil, and recycled pavement material. Five different flyashes were used [Columbia and Riverside 7 (classified as Class C); Dewey, King and Riverside 8 (classified as off-specification)] at different percentages (10%, 12%,14% and 20%) and at three different water contents (7% wet of optimum, optimum,and at field water content). Tests were also conducted on soil alone (0% fly ash)without freeze-thaw cycling to define the reference condition.
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