Abstract
| Original language | English |
|---|---|
| Title of host publication | PanAm Unsaturated Soils 2017 |
| Subtitle of host publication | Fundamentals |
| Editors | Laureano R. Hoyos, John S. McCartney, Sandra L. Houston, William J. Likos |
| Place of Publication | Reston, Virginia |
| Publisher | American Society of Civil Engineers (ASCE) |
| Pages | 514-522 |
| Number of pages | 9 |
| ISBN (Print) | 9780784481684 |
| DOIs | |
| Publication status | Published - 20 Jun 2018 |
| Event | 2nd Pan-American Conference on Unsaturated Soils: Fundamentals - Dallas, United States Duration: 12 Nov 2017 → 15 Nov 2017 |
Conference
| Conference | 2nd Pan-American Conference on Unsaturated Soils |
|---|---|
| Country | United States |
| City | Dallas |
| Period | 12/11/17 → 15/11/17 |
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Keywords
- high capacity tensiometers
- HCT
- saturation
- resaturation
- air entry value filters
Cite this
}
First saturation and resaturation of high capacity tensiometers with 1.5 MPa high air entry value (HAEV) ceramic filters. / Mendes, J.; Gallipoli, D.; Toll, D.G.; Tarantino, A.
PanAm Unsaturated Soils 2017: Fundamentals. ed. / Laureano R. Hoyos; John S. McCartney; Sandra L. Houston; William J. Likos. Reston, Virginia : American Society of Civil Engineers (ASCE), 2018. p. 514-522.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book
TY - GEN
T1 - First saturation and resaturation of high capacity tensiometers with 1.5 MPa high air entry value (HAEV) ceramic filters
AU - Mendes, J.
AU - Gallipoli, D.
AU - Toll, D.G.
AU - Tarantino, A.
N1 - This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://doi.org/10.1061/9780784481684.052.
PY - 2018/6/20
Y1 - 2018/6/20
N2 - High Capacity Tensiometers, or HCTs, are sensors that can measure negative pore water pressures (soil suctions) between -1.5 and -2 MPa. To achieve such measured values, HCTs first need to be fully saturated by water. For the first saturation of an initially dry HCT, the most common procedure involves application of vacuum followed by forced flooding by pressurised water. Instead, for the resaturation of a HCT that has cavitated (and is therefore still water flooded), only application of water pressure is necessary. Typically, the procedures for the first saturation and resaturation of HCTs can last days or weeks, which hinders adoption of these devices by the geotechnical industry. In this paper, faster procedures are presented for both first saturation and resaturation of HCTs built with 1.5 MPa air entry value filters. The duration of the first saturation can be reduced to less than 24 hours if high vacuum is first applied to the ceramic filter followed by water pressurisation at about twice the air entry value of the filter. Even more, resaturation of a cavitated HCT can be achieved in less than 10 minutes by simple water pressurisation of the ceramic filter. This is however true only if the HCT is not left to dry out to the atmosphere completely and is submerged in water just after cavitation.
AB - High Capacity Tensiometers, or HCTs, are sensors that can measure negative pore water pressures (soil suctions) between -1.5 and -2 MPa. To achieve such measured values, HCTs first need to be fully saturated by water. For the first saturation of an initially dry HCT, the most common procedure involves application of vacuum followed by forced flooding by pressurised water. Instead, for the resaturation of a HCT that has cavitated (and is therefore still water flooded), only application of water pressure is necessary. Typically, the procedures for the first saturation and resaturation of HCTs can last days or weeks, which hinders adoption of these devices by the geotechnical industry. In this paper, faster procedures are presented for both first saturation and resaturation of HCTs built with 1.5 MPa air entry value filters. The duration of the first saturation can be reduced to less than 24 hours if high vacuum is first applied to the ceramic filter followed by water pressurisation at about twice the air entry value of the filter. Even more, resaturation of a cavitated HCT can be achieved in less than 10 minutes by simple water pressurisation of the ceramic filter. This is however true only if the HCT is not left to dry out to the atmosphere completely and is submerged in water just after cavitation.
KW - high capacity tensiometers
KW - HCT
KW - saturation
KW - resaturation
KW - air entry value filters
UR - https://ascelibrary.org/doi/book/10.1061/9780784481684
U2 - 10.1061/9780784481684.052
DO - 10.1061/9780784481684.052
M3 - Conference contribution book
SN - 9780784481684
SP - 514
EP - 522
BT - PanAm Unsaturated Soils 2017
A2 - Hoyos, Laureano R.
A2 - McCartney, John S.
A2 - Houston, Sandra L.
A2 - Likos, William J.
PB - American Society of Civil Engineers (ASCE)
CY - Reston, Virginia
ER -