Experimental Study of Soil-Water Characteristic Curves in the Full Suction Range of Organic Matter-Containing Soils and Analysis of Their Water-Holding Properties

DOI

10.2991/978-94-6463-728-1_39How to use a DOI?

Keywords

Soil-water characteristic curves; Organic clay; Water-holding capacity

Abstract

Organics have an important impact on the water-holding capacity of clay, but the law and mechanism of this impact have not been studied systematically. In this paper, samples with different contents of organic matter were prepared by taking bentonite as a matrix and adding peat, and soil-water property tests were carried out using the pressure plate method, the filter paper method and the vapour balance method., fitted to the test results and analyzed by using three kinds of models; and the fitted parameters of the soils containing organic matter were compared with those of other types of soils. Finally, the differences between the fitted parameters of the soils containing organic matter and those of the other soils were analysed. The results of the tests show that the three different tests are capable of accurately reflecting the soil-water characteristics of clays containing organic matter over the whole of the suction range; organic matter can have an effect on water retention in clays, but water retention is also a function of pore structure and the morphology of water in the pores within a particular suction range.; the Lu model is the best model for describing the soil-water characteristic curve of clay containing organic matter, and the changes in its parameters were consistent with the trends in organic matter content. By comparison, it was found that organic matter-containing soils have a higher water retention capacity, and their maximum adsorption water saturation is significantly greater than that of other soil types.

Copyright

© 2025 The Author(s)

Open Access

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TY  - CONF
AU  - Zeyu Song
AU  - Yue Gu
PY  - 2025
DA  - 2025/05/19
TI  - Experimental Study of Soil-Water Characteristic Curves in the Full Suction Range of Organic Matter-Containing Soils and Analysis of Their Water-Holding Properties
BT  - Proceedings of the 3rd International Conference on Green Building, Civil Engineering and Smart City (GBCESC 2024)
PB  - Atlantis Press
SP  - 390
EP  - 401
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-728-1_39
DO  - 10.2991/978-94-6463-728-1_39
ID  - Song2025
ER  -