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Estimation of Particle Size Distribution from Time Domain Reflectometry: Potentials and Limitations
Particle size distribution is one of the most critical pieces of information for soil classification. Conventionally it is measured from mechanical sieve analyses for coarse grained soils and from hydrometer analyses for fine grained soils. For hydrometer analyses, readings are typically taken at prescribed time intervals. This paper introduces a testing method to estimate the particle size distribution from Time Domain Reflectometry (TDR). A theoretical model is developed to interpret TDR signals, from which the soil particle size distributions can be determined. The testing set up can be conducted in a same cylinder as with hydrometer. The hydrometer is replaced with a TDR probe, which automatically takes signals. From measured TDR signal evolutions the particle size can be determined. Promising results were obtained for a few soils tested. Limitations of this technology and aspects that need to be further improved are discussed.
Estimation of Particle Size Distribution from Time Domain Reflectometry: Potentials and Limitations
Particle size distribution is one of the most critical pieces of information for soil classification. Conventionally it is measured from mechanical sieve analyses for coarse grained soils and from hydrometer analyses for fine grained soils. For hydrometer analyses, readings are typically taken at prescribed time intervals. This paper introduces a testing method to estimate the particle size distribution from Time Domain Reflectometry (TDR). A theoretical model is developed to interpret TDR signals, from which the soil particle size distributions can be determined. The testing set up can be conducted in a same cylinder as with hydrometer. The hydrometer is replaced with a TDR probe, which automatically takes signals. From measured TDR signal evolutions the particle size can be determined. Promising results were obtained for a few soils tested. Limitations of this technology and aspects that need to be further improved are discussed.
Estimation of Particle Size Distribution from Time Domain Reflectometry: Potentials and Limitations
Yu, Xiong (author) / Yu, Xinbao (author)
GeoCongress 2008 ; 2008 ; New Orleans, Louisiana, United States
GeoCongress 2008 ; 269-275
2008-03-07
Conference paper
Electronic Resource
English
Estimation of Particle Size Distribution from Time Domain Reflectometry: Potentials and Limitations
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