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Assessing the Quality of Soils Modified with Lime Kiln Dust: Measuring Electrical Conductivity with Time Domain Reflectometry.
| 题名： | Assessing the Quality of Soils Modified with Lime Kiln Dust: Measuring Electrical Conductivity with Time Domain Reflectometry. |
| 作者： | Daita-Radha-Krishna; Drnevich-Vincent-P; Kim-Daehyeon; Chen-Renpeng |
| 关键词： | Absorption-; Aggregate-mixtures; Fine-aggregates; Specific-gravity; Testing-equipment |
| 摘要： | Concern has been expressed about the repeatability of the current AASHTO T 84 method for determination of fine aggregate specific gravity. Two new methods are available for determining bulk specific gravity and absorption of fine aggregates: the AggPlus system using the CoreLok device and the SSDetect system. In addition, a new automated Langley de-airing device is available for AASHTO T 84. The objectives of this study were (a) to evaluate the reproducibility of SSDetect, CoreLok, AASHTO T 84, and AASHTO T 84 with the Langley de-airing device and (b) to determine if either of the new systems would produce results statistically similar to those produced by the current AASHTO T 84 procedure. The AASHTO procedure, when used with the Langley de-airing device, gave similar results to AASHTO T 84 but with reduced variability. The SSDetect procedure produced the highest bulk specific gravity and lowest percent absorption followed by the CoreLok and AASHTO T 84 procedures. There was no significant difference in apparent specific gravity values. Increasing the cure time for the SSDetect procedure resulted in increased saturated surface dry mass. |
| 总页数： | Transportation Research Record: Journal of the Transportation Research Board. 2006. (1952) pp3-11 (3 Phot., 4 Fig., 9 Tab., 7 Ref.) |
| 报告类型： | 科技报告 |
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