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ESTIMATING THE DESIGN LIFE OF A PROTOTYPE CEMENT-STABILIZED PHOSPHOGYPSUM PAVEMENT.
| 题名： | ESTIMATING THE DESIGN LIFE OF A PROTOTYPE CEMENT-STABILIZED PHOSPHOGYPSUM PAVEMENT. |
| 作者： | Gerrity-DM; Metcalf-JB; Seals-RK |
| 关键词： | CEMENT-STABILIZED-PHOSPHOGYPSUM; UNCONFINED-COMPRESSIVE-STRENGTH; STABILIZED-BASE-COURSES-MATERIALS; MODULUS-OF-RESILIENCE; DESIGN-LIFE; BEARING-CAPACITY; SUBGRADES-; SECONDARY-ROADS |
| 摘要： | Cement-stabilized phosphogypsum (CSPG) mixtures are demonstrated to have sufficient strength at the modified Proctor compaction level to satisfy the Louisiana Department of Transportation and Development design unconfined compressive strength (UCS) criteria of 1.7 MPa at 7 days for stabilized base material. With 8-12% cement, at 95% of modified Proctor maximum dry unit weight, CSPG had greater resilient modulus and UCS values than the commonly used river silt. Life estimates for a prototype road were highly dependent on the bearing capacity of the subgrade soil. The CSPG base produced acceptable estimated design lives for secondary roads at an attractive cost compared with conventional limestone aggregate. |
| 总页数： | Transportation Research Record. 1994. (1440) pp32-36 (4 Fig., 5 Tab., 9 Ref.) |
| 报告类型： | 科技报告 |
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