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COMPARISON OF ROAD MIX AND PLANT MIX CEMENT-TREATED AGGREGATE BASE COURSE.
| 题名： | COMPARISON OF ROAD MIX AND PLANT MIX CEMENT-TREATED AGGREGATE BASE COURSE. |
| 作者： | Corley-Lay-JB |
| 关键词： | CEMENT-TREATED-BASES; PLANT-MIX; ROAD-MIX; COMPARISONS-; MATERIAL-PROPERTIES; UNIFORMITY-; DEFLECTION-; COMPRESSIVE-STRENGTH; MODULUS-OF-ELASTICITY; PAVEMENT-THICKNESS |
| 摘要： | A study was undertaken to determine the advantages of plant mix over road mix cement-treated aggregate base course (CTABC). Ten projects known to have cement-treated base course were selected. Each had been tested with a falling-weight deflectometer and had been cored to determine layer thicknesses and properties either in the past or as part of the current effort. Three possible benefits were considered: improved uniformity of material properties, reduced deflections, and increased strength or stiffness. Neither the coefficient of variation nor a developed uniformity coefficient showed a significant difference between plant mix and road mix. Plant mix resulted in lower average deflections and lower deflections when sites were compared with equal thicknesses of asphalt above the base course. However, road mix sites had higher compressive strengths than did plant mix sites. Backcalculated moduli for CTABC were higher for plant mix than for road mix, but the elastic moduli were similar for plant and road mix when determined by pulse-velocity testing. It was concluded that no clear benefit could be determined from using plant mix based on the sample of 10 projects, although the benefit of an adequate thickness of asphalt above the CTABC was clearly demonstrated. |
| 总页数： | Transportation Research Record. 1997. (1589) pp76-82 (7 Fig., 3 Tab., 3 Ref.) |
| 报告类型： | 科技报告 |
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