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Equivalency of Crushed Rock with Industrial By-Products and Geosynthetic-Reinforced Aggregates Used for Working Platforms During Pavement Construction. Final rept.
| 题名： | Equivalency of Crushed Rock with Industrial By-Products and Geosynthetic-Reinforced Aggregates Used for Working Platforms During Pavement Construction. Final rept. |
| 作者： | BENSON, C. H.; EDIL, T. B.; KIM, W. H.; TANYU, B. F. |
| 关键词： | *Pavement-tests; *Subgrades-.;Thickness-; Reinforcement-; Byproducts-; Deflection-; Geosynthetics-. |
| 摘要： | A study was conducted to define an equivalency criterion for five materials used for working platforms during pavement construction on a poor subgrade: conventional crushed rock (referred to as 'breaker run') and four alternatives (i.e. Grade 2 granular backfill (referred to as 'Grade 2'), foundry slag, bottom ash, and foundry sand). Total deflection data for the equivalency assessment were obtained from a large-scale model experiment (LSME) simulating a prototype-scale pavement structure and in the field using a rolling wheel deflectometer (RWD). Design charts were developed for selecting the equivalent thickness of alternative working platform materials so that the alternative provides equal deflection as a layer of breaker run. Another phase of the study was conducted to determine the equivalency of geosynthetic-reinforced aggregate working platforms in providing support during pavement construction over soft subgrade. Four reinforcing geosynthetics (a geogrid, a woven geotextile, a non-woven geotextile, and drainage geocomposite) incorporated into two granular materials. Grade 2 and breaker run were used in this study. Design charts were developed for selecting the equivalent thickness of an alternative geosynthetic-reinforced working platform material so that the alternative provides equal deflection as a layer of breaker run. |
| 报告类型： | 科技报告 |
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