Calibration of filter paper for measuring total soil suction
| Autor: | S. P. Bajad, S. R. Khandeshwar, S. P. Raut, P. B. Pande |
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| Rok vydání: | 2019 |
| Předmět: |
Suction
Filter paper Calibration curve Calibration (statistics) General Chemical Engineering General Engineering General Physics and Astronomy Mechanics Exponential function General Earth and Planetary Sciences General Materials Science Relative humidity Osmotic coefficient General Environmental Science Mathematics |
| Zdroj: | SN Applied Sciences. 1 |
| ISSN: | 2523-3971 2523-3963 |
| DOI: | 10.1007/s42452-019-0820-x |
| Popis: | Calibration curve plays an important role in filter paper method because it affects accuracy in soil suction values. Osmotic coefficient and relative humidity govern the osmotic suction required to develop calibration curve and equation. Most of the researchers used the readily available total (osmotic) suction values from various studies to develop the calibration curve. Very few researchers used the osmotic coefficient in calibration and studied its effect on calibration and measuring suction. In this paper, the effect of the osmotic suction proposed by various researchers on calibration of Whatman 42 Filter paper was studied. Logarithmic and exponential calibration equations were developed and compared. The NaCl solution used in the present study provides limited total suction range of 0–30,000 kPa. The total suction of clayey soil was measured to validate the calibration curves proposed in this study. The feasibility of proposed osmotic coefficients is verified by measuring total suction of soil. The total suction estimated from calibration curve using osmotic coefficients was found to be more accurate. |
| Databáze: | OpenAIRE |
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