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A series of resonant column tests was conducted on chemically stabilized specimens of sulfate-rich expansive clay from southeast Arlington, Tex. Specimens were tested for different stabilizer types, stabilizer dosages, compaction moisture contents, and confining pressures. Three chemical stabilization methods were used: sulfate resistant type V cement, low calcium class F fly ash, and lime mixed with polypropylene fibers. Results in the small-shear strain amplitude range (<0.0001%) were analyzed to assess the influence of compaction moisture content and confining pressure on the linear shear modulus G[sub max] and material damping D[sub min] of stabilized soil. Tests were also conducted at small- to mid-shear strain amplitude levels (0.0001–0.01%) to assess the threshold strain limit γ[sub th] for each treatment method, and to study the effects of torsional shearing on the rate of degradation of normalized modulus G/G[sub max] of treated soil. A 10%-by-weight dosage of sulfate resistant type V cement was found to give the highest modulus and lowest damping when compacted at 95% of maximum dry unit weight γ[sub d-max] on the wet side of Proctor optimum. [ABSTRACT FROM AUTHOR]

Investigates the engineering properties of residuals from water treatment plants (WTP) in Arlington, Texas. Characteristics and properties of residual; Review of literature on the physical and engineering properties of WTP; Size distribution of particles; Specific gravity of WTP.