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INFLUENCE OF SOIL SUCTION AND ENVIRONMENTAL FACTORS ON DRYING CHARACTERISTICS OF GRANULAR SUBGRADE SOILS.
| 题名： | INFLUENCE OF SOIL SUCTION AND ENVIRONMENTAL FACTORS ON DRYING CHARACTERISTICS OF GRANULAR SUBGRADE SOILS. |
| 作者： | Ping-WV; Ling-C-C; Ho-RKH |
| 关键词： | Drying-; Drying-rate; Fines-Materials; Florida-; Granular-soils; Humidity-; Moisture-content; Soil-compaction; Soil-suction; Soil-tests; Subgrade-Pavements; Weather-conditions |
| 摘要： | According to contractors in Florida, construction problems have emerged because pavement soils hold excessive water and are difficult to dry and compact. Recent research on the effects of soil suction and environmental conditions on drying rate characteristics of six types of troublesome granular soils is presented. Two types of tests were conducted for the study: soil suction tests using the thermocouple psychrometer method and drying rate tests using an environmental chamber. The experimental results showed that both the soil suction and relative humidity had direct effects on the soil-drying rate. The drying rate decreased with an increase in soil suction for each soil type and also decreased with an increase in the percentage of fines. The influence of relative humidity on the soil-drying rate was much more significant than the effect of the temperature. The rate of water evaporation was extremely low for the soils with a higher percentage of fines when the relative humidity was high. The A-2-4 soils with greater than 20% of fines may have such a low drying rate in an environment with high relative humidity that they are difficult to handle during construction. |
| 总页数： | Transportation Research Record. 2000. (1714) pp98-106 (2 Phot., 9 Fig., 4 Tab., 6 Ref.) |
| 报告类型： | 科技报告 |
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