Swell pressure prediction by suction methods

Date

2007-07-10

Author

Erzin, Yusuf
Erol, Orhan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

184
views

0
downloads

Soil suction is the most relevant soil parameter for characterization of the swell behavior. An attempt was made to predict swell pressures from soil suction measurements. In this study, Na-bentonite was mixed with kaolinite in the ratios of 5, 10, 15, 20 and 25% of dry kaolinite weight to obtain soils in a wide range of plasticity indices (i.e. 30, 50, 68, 84 and 97%). Suction measurements using thermocouple psychrometer technique were made on statically compacted specimens. The dependence of soil suction on water content, dry density and bentonite content was examined. Soil suction was correlated to the soil properties, namely, water content, plasticity index, dry density, cation exchange capacity and specific surface area using multiple regression analyses. The correlations revealed a simple regression equation for a quick prediction of soil suctions from easily determined soil properties. In order to investigate soil suction versus swell pressure behavior, the results of standard constant volume swell tests (ASTM, 1990) performed on statically compacted samples of these clay mixtures were used. A linear relationship was established between the logarithm soil suction and the swell pressure. It was also found that an experimental relationship which would directly relate the initial soil suction to the swell pressure can be established. (c) 2007 Elsevier B.V All rights reserved.

Subject Keywords

Bentonite, Swell pressure, Soil suction, Psychrometer, Expansive soils

URI

https://hdl.handle.net/11511/64502

Journal

ENGINEERING GEOLOGY

DOI

https://doi.org/10.1016/j.enggeo.2007.04.002

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Swell pressure prediction by suction methods Kandemir, A; Erol, O; Erzin, Y (1997-09-12) Soil suction is the most relevant soil parameter for characterization of the swell behaviour. An attempt has been made to predict the swell pressures from soil suction measurements. Bentonite-Kaolinite clay mixtures were prepared to obtain soils in a wide range of plasticity indices. Suction measurements using thermocouple physchrometer technique and constant volume swell tests in oedometers were made on statically compacted specimens. Soil suction is correlated to plasticty index, water content and dry den...
A Preliminary study on construction of a high capacity tensiometer and its use in measurement of matrik suction in unsaturated soils Köksalan, Ali Okan; Toker, Nabi Kartal; Department of Civil Engineering (2013) Soil suction is one of the main state parameters that governs unsaturated soil behaviour. Tensiometers are the only type of probe that can measure soil suction directly, but only up to 90 kPa. In the past two decades, a new type of tensiometer with much greater measurement range (up to 2 MPa) has appeared in the literature. The measurement range (i.e. capacity) of a tensiometer is limited by (i) how well it is saturated, and (ii) the air entry value of its porous interface. In this study, the first high cap...
Comparative study of soil water characteristic curve prediction methods Ahmadiadli, Mohammad; Huvaj Sarıhan, Nejan; Toker, Nabi Kartal; Kürkçü, Mefküre Gamze (2012-06-30) The soil-water characteristic curve (SWCC), which defines the relation between soil suction and water content, plays a key role in geotechnical studies of the unsaturated soils. Some researchers such as Brooks & Corey (1968), Van Genuchten (1982) and Fredlund& Xing (1994) have proposed curve fitting equations for SWCC. Fitting equations to the laboratory test data obtained from direct measurement of water content versus changes in matric suction is the most reliable method, but it is expensive and time cons...
Soil water content estimation from point scale to plot scale Demir, Gökben; Akyürek, Sevda Zuhal; Department of Civil Engineering (2018) Estimating soil moisture is crucial for understanding vadose zone and surface hydrology dynamics. In this study, soil moisture measurement is investigated by using a range of techniques spanning different spatial scales in a test basin in the south of Turkey. A cosmic ray sensor soil moisture probe (CRS) and a water content reflectometer (CS-616) have been installed for retrieving volumetric soil moisture data continuously. Lab analyses have been performed for calibrating the installed instruments and to ob...
Estimation of grain characteristics of soils by using cone penetration test (CPT) data Ozan, Cem; Çetin, Kemal Önder; Department of Civil Engineering (2003) Due to lack of soil sampling during a conventional cone penetration testing (CPT), it is necessary to classify soils based on recorded tip and sleeve friction and pore pressure (if available) values. However, currently available soil classification models are based on deterministic and judgemental determination of soil classification boundaries which do not address the uncertainties intristic to the problem. Moreover, size and quality of databases used in the development of these soil classification models ...

Citation Formats

Y. Erzin and O. Erol, “Swell pressure prediction by suction methods,” ENGINEERING GEOLOGY, pp. 133–145, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64502.