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原文传递 Performance Evaluation and Numerical Modeling of Embankment over Soft Clayey Soil Improved with Chemico-Pile.

题名：	Performance Evaluation and Numerical Modeling of Embankment over Soft Clayey Soil Improved with Chemico-Pile.
作者：	Hossain-Sahadat; Rao-Krishna-Nag
关键词：	Acids-; Compressive-strength; Cost-effectiveness; Ettringite-; Ground-granulated-blast-furnace-slag; Lime-; Polymers-; Road-construction; Soil-stabilization; Soil-stabilizers; Sulfate-rich-soils; Swel
摘要：	In an effort to construct roads more quickly, high-plasticity index soils stabilized with lime are now routinely compacted the day after mixing. With this practice has come an increasing number of heaves due to soluble sulfates reacting with the lime to form ettringite. Soils with sulfate concentrations below 7,000 to 8,000 parts per million (ppm) can generally be treated with lime. This research was performed to identify stabilizers that can be used with sulfate concentrations above 10,000 ppm. The effectiveness of the stabilizers was determined by the measurement of three-dimensional (3-D) swell reduction and unconfined compressive strength. The researchers evaluated 12 stabilizers, including enzymes, polymers, acids, emulsions, fly ash, and ground granulated blast furnace slag (GGBFS). Three stabilizers significantly reduced volumetric swell. A polymer and an acid reduced swell by about 8%. GGBFS plus lime reduced swell by 10%. GGBFS plus lime was the only stabilizer that reduced swell, increased strength, and was cost-effective enough for the Texas Department of Transportation to consider as an alternative to lime in high-sulfate soils.
总页数：	Transportation Research Record: Journal of the Transportation Research Board. 2006. (1952) pp71-79 (1 Phot., 3 Fig., 4 Tab., 22 Ref.)
报告类型：	科技报告