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RESILIENT PROPERTIES AND MICROSTRUCTURE OF MODIFIED FLY ASH-STABILIZED FINE-GRAINED SOILS.
| 题名： | RESILIENT PROPERTIES AND MICROSTRUCTURE OF MODIFIED FLY ASH-STABILIZED FINE-GRAINED SOILS. |
| 作者： | Chang-DT-T |
| 关键词： | SUBGRADES-; FLY-ASH; STABILIZATION-; TAIWAN-; LIME-; LABORATORY-TESTS; PLASTICITY-INDEX; MODULUS-OF-RESILIENCE; TEST-SECTIONS; FIELD-INVESTIGATIONS; CALIFORNIA-BEARING-RATIO; MICROSTRUCTURES- |
| 摘要： | A comprehensive study on the application of Class F fly ash for stabilizing subgrade soils in Taiwan is presented. Lime (or cement) was used with fly ash to enhance its self-cementing behavior in the study. Laboratory testing included using the plasticity index method to determine the optimum percentages of additive and fly ash. Through a resilient modulus (M sub r) test program, these percentages were confirmed. A section of test road with treated subgrade constructed on the West Coast Highway has been open to traffic for 40 months to date. A field investigation of this section was part of this study. Results from field California bearing ratio tests indicate that treatment of the subgrade soil had improved its properties by a factor of 10 to 15. Specimens obtained from the field were also evaluated through an M sub r test program, and the results were compatible with those for laboratory-made samples. Finally, a microstructure study is presented showing significant cementitious materials in laboratory and field specimens. Confidence about the future application of Class F fly ash for stabilizing subgrade soils in Taiwan and for handling this problematic waste material is provided. |
| 总页数： | Transportation Research Record. 1995. (1486) pp88-96 (6 Fig., 7 Tab., 10 Ref.) |
| 报告类型： | 科技报告 |
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