Field and experimental studies to assess the performance of stabilized expansive clay

A vast majority of the natural expansive soils are montmorillonite-rich clays, over consolidated clays and shales. Certain sulfate rich soils such as those encountered in south Arlington also exhibit heaving after chemically treating them with calcium based stabilizers including cement and lime. Both swelling and softening of these soils induce damage to overlying pavement infrastructure.; The present research was conducted at the University of Texas at Arlington as a part of a research study for the City of Arlington to explore and develop alternate stabilization methods for sulfate rich soils of South Arlington. Based on literature review of sulfate rich expansive soil treatments and comprehensive laboratory studies, the following four novel stabilizers were recommended for field treatment studies: Sulfate Resistant Cement (Type V), Low Calcium Class F Fly Ash with Type V Cement, Ground Granulated Blast Furnace Slag and Lime mixed with Polypropylene Fibers. The laboratory studies focused on Atterberg limits, unconfined compressive strength, resilient modulus, linear shrinkage, vertical swelling of chemically treated south Arlington soils. (Abstract shortened by UMI.)...