Basic physical and mechanical properties of water repellent sand-clay miхed soil

被引：0

作者：

Yang S. ^{[1
]}

Huang Y. ^{[2
]}

机构：

[1] College of Civil Engineering and Architecture, Beibu Gulf University, Qinzhou

[2] Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing

来源：

Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2023年 / 45卷

关键词：

absorption; matric suction; repellent soil; shear strength; WDPT;

D O I：

10.11779/CJGE2023S10024

中图分类号：

学科分类号：

摘要：

The water repellent soil has many excellent properties. At present, its use is mainly aimed at the water repellent sand. In order to expand the application scope of the water repellent soil, a series tests are carried out. The results show that the loose soil samples of the mixture of the water repellent clay exhibit obvious non-uniformity of water repellency after adsorption stability under isothermal conditions, while the mixture of the water repellent clay and sand exhibits uniformity of water repellency. Two kinds of soils are uniformly repelled after compaction. The position of soil-water characteristic curve of the hydrophilic soil is higher than that of the water repellent soil, but there is no change of matric suction from attraction" to "exclusion". The cohesion of hydrophilic clay will be reduced after water repellency. Adding hydrophilic sand or water repellent sand does not cause the difference of shear strength. The difference of physical and mechanical properties between the water repellent soil and the hydrophilic soil is mainly due to the adsorption of clay particles and the existence of water repellent clay aggregates. The addition of the water repellent clay and sand greatly expands the application scope of the water repellent soil. The research results may provide the corresponding test basis for the popularization and application of the water repellent soil. © 2023 Chinese Society of Civil Engineering. All rights reserved."

引用

页码：29 / 33

页数：4

共 12 条

[1] DIEHL D., Soil water repellency: dynamics of heterogeneous surfaces, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 432, pp. 8-18, (2013)
[2] LI Yi, SHANG Yanling, LI Zhenhua, Et al., Advance of study on soil water repellency, Transactions of the Chinese Society for Agricultural Machinery, 43, 1, pp. 68-75, (2012)
[3] RYE C F, SMETTEM K R J., The effect of water repellent soil surface layers on preferential flow and bare soil evaporation, Geoderma, 289, pp. 142-149, (2017)
[4] MULLER K, DEURER M., Review of the remediation strategies for soil water repellency, Agriculture, Ecosystems & Environment, 144, 1, pp. 208-221, (2011)
[5] LEELAMANIE D A L, KARUBE J., Water-dependent repellency of model soils as affected by clay, Soil Science and Plant Nutrition, 57, 1, pp. 7-10, (2011)
[6] YANG B J, BLACKWELL P S, NICHOLSON D F., A numerical model of heat and water movement in furrow-sown water repellent sandy soils, Water Resources Research, 32, 10, pp. 3051-3061, (1996)
[7] KIM B S, REN D J, PARK S W, Et al., Establishing selection criteria of water repellent sandy soils for use in impervious layer of engineered slope, Construction and Building Materials, 293, (2021)
[8] GUPTA B, SHAH D O, MISHRA B, Et al., Effect of top soil wettability on water evaporation and plant growth, Journal of Colloid and Interface Science, 449, pp. 506-513, (2015)
[9] YANG Song, HUANG Jianfeng, LUO Maoquan, Et al., Pore water-air configurations in water repellent sandy soil and its effects on transformation of hydrophilicity to hydrophobicity, Transactions of the Chinese Society for Agricultural Machinery, 48, 11, pp. 247-252, (2017)
[10] DEKKER L W, DOERR S H, OOSTINDIE K, Et al., Water repellency and critical soil water content in a dune sand, Soil Science Society of America Journal, 65, 6, pp. 1667-1674, (2001)

← 1 2 →