Evaluation of Measurement Methodologies Used for Establishing Water Retention Characteristic Curve of Fly Ash
Evaluation of Measurement Methodologies Used for Establishing Water Retention Characteristic Curve of Fly Ash
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DOI：
10.1520/jte20130091
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发表时间：
2015-09
影响因子：
1.2
通讯作者：
D. Abhijit;S. Sreedeep
中科院分区：
文献类型：
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作者：
D. Abhijit;S. Sreedeep
粉煤灰在岩土工程和环境地质工程中具有潜在的应用价值，其保水特性曲线在这些工程中具有重要意义。本研究的主要目的是建立固有范围内的测量吸力的脂肪酸使用四种不同的工具：张力计（TM），基质电位传感器，等张力计（EQT），和WP 4露点电位与不同的测量范围。基于实测结果，研究了4个火电厂灰岩水资源承载力方程参数的变异性。此外，不同范围的吸力对水资源承载力方程参数的FA的敏感性进行了研究。研究表明，FA的可测量吸力范围为1 ~ 1000 kPa，可方便地用EQT测量。FA的参数不受WP 4的高吸力测量（>1000 kPa）的影响。使用WP 4获得的吸力数据（>1000 kPa）可以附加一个低吸力范围的仪器，如TM，以更好地代表FA的WRCC。然而，研究表明，WRCC参数化FA的影响更低的吸力范围。
Fly ash (FA) has potential applications in geotechnical and geoenvironmental projects, where its water retention characteristic curve (WRCC) is important. The main objective of this study was to establish the inherent range of measured suction of FAs using four different tools: tensiometer (TM), matric potential sensor, equitensiometer (EQT), and WP4 dew point potentiameter with a varying measurement range. Based on the measured results, the variability of WRCC equation parameters of four FAs collected from different thermal power plants were studied. Further, the sensitivity of a different range of measured suction on WRCC equation parameters of FA was investigated. The study indicated that the possible range of measurable suction for FA is 1 to 1000 kPa, which can be measured conveniently with an EQT. The parameters of FA were not influenced by high suction measurements (>1000 kPa) of WP4. The suction data (>1000 kPa) obtained using the WP4 can be appended with a low-suction-range instrument such as a TM for a better representation of the WRCC of FA. However, the study indicated that WRCC parameterization of FA is influenced more by the low range of suction.