| A series of unconfined compressive strength (UCS, ASTM D 2166) and unconsolidated undrained triaxial (UU, ASTM D 2850) tests on several chemically stabilized specimens of high-plasticity, sulfate-rich expansive clay from southeast Arlington, Texas were performed. The influence of cyclic wetting and drying of treated specimens were analyzed in terms of shear strength and one-dimensional volume change response. Different stabilizer types and dosages, respective compaction moisture contents, and number of wetting-drying cycles were considered.; In this work, three novel chemical stabilizers were employed: (1) sulfate resistant "Type V" cement, (2) low calcium "Class F" fly ash, and (3) lime mixed with polypropylene fibers. Strength properties investigated include unconfined compressive strength (qu) and undrained shear strength (su). 5%-by-weight "Type V" cement stabilized specimens produced the best overall performance under cyclic wetting and drying. |
