... characteristics of gas mixtures recommend the implementation of robust equations of state, such as Peng–Robinson. However, the modelling of suction, a key variable in coupled thermo-hydro-mechanical analyses, involves an implicit dependency between gas pressure, vapour concentration, and suction itself, which...

...M. Ge; J. Pineda; D. Sheng This paper explores the relative contributions of wetting (suction reduction) and its associated volume change on the small-strain shear stiffness, G₀, in compacted loess from Xi’an, China. Results from one-dimensional compression tests...

... the measured WRCC of the WAP. The volume ratio of WAP-soil solid is given by laboratory tests suction unsaturated soils water flow Water-absorbing polymers (WAPs) can absorb and retain a large quantity of water (∼100–300 times their weight). The application of WAPs is gaining popularity...

...S. Bulolo; E. C. Leong; H. Abuel-Naga The filter paper method is an economical, easily accessible, and simple-to-use method to measure total or matric suction over a wide suction range. Difficulty in handling the filter paper can result in inaccurate water content determination of the filter paper...

... in the suction range of 0−400 kPa. Furthermore, their pore-size distributions (PSDs) were measured through mercury intrusion porosimeter (MIP) for explaining the measured WRCs. The results show that the air-entry value of reconstituted loess is 505% and 169% larger than that of intact and compacted loess...

...W. Lieske; S. Tripathy; W. Baille; T. Schanz Determination of suction of polyethylene glycol (PEG) is vital for unsaturated laboratory testing that uses the osmotic technique to study the hydromechanical behaviour of fine-grained soils. To date, suctions of PEG solutions have been either...

...S. Roy; S. Rajesh The coupled effect of net mean stress and suction on the air permeability of compacted soils has been investigated in this study. The air permeability of compacted soils was conducted at various pre-equilibrated gravimetric water contents and at different net mean stresses using...

... tomography (CT) and image treatment to investigate the soil collapse of volcanic sands of southern Italy at both macro- and micro-scale. The specimens were tested under self-weight and the matric suction was gradually reduced until collapse. Standard techniques and image analysis were used to measure...

... considered in clay–sand mixtures. Soil suction, water content and gas pressure were measured continuously using a new in-house developed apparatus. Test results show that the presence of BC increased soil water content and the increased amount was almost the same over a wide range of suction values (up to 3...

... be written as 5 χ = [ S r ( s , e 0 ) ] k where S_r(s,e_{0) can be determined by equation (3) . Substituting equation (5) into equation (4) gives ICE Publishing: all rights reserved 2018 shear strength stress analysis suction}...

... (E_tr), grass density (GD), shoot length (SL) and soil parameters (i.e. suction (ψ), volumetric moisture content (θ), crack intensity factor (CIF), evaporation (E_r)) were monitored for all series. SGWH decreases the CIF potential of soil by 55·5 and 25% for BS...

... population, the diameter corresponding to the main air entry value (AEV) is defined as the boundary between macro- and micro-pores. For the materials with two pore populations, there are two AEVs. If the pore size of unsaturated soil deduced from the soil suction is larger than the one corresponding...

...J. J. Ni; X. W. Chen; C. W. W. Ng; H. W. Guo Biochar is the pyrolysed biomass which has been used as a soil amendment to improve plant performance. This study aims to investigate the effects of biochar–plant interaction on soil water retention and matric suction in silty sand (SM). In total, four...

... suction and consequent CIF for a native mixed grass species. The vegetation undergoes eight drying cycles in compacted soil under natural environmental conditions and controlled irrigation scheduling. It is seen that the grass species helped reducing the maximum CIF of bare soil by 20%. A VD growth of 40...

...-nutrient-supplied conditions. However, the effects of NPK (nitrogen, phosphorous, potassium) water-soluble fertilisers on plant roots and shoot growth in bioengineered soil slopes and their influence on soil suction and water-retention ability are still unclear. This paper quantifies the growth of a tree...

... and constant load conditions) by using equipments able to cover matric suction values ranging from 2 to 800 kPa along drying paths. The measured data are fitted with bimodal parametric functions useful to retrieve air-entry values and percentages of the total porosities pertaining to two porosity systems...

... of hydrogels between soil particles and free water by way of hydrogen bonds (Chen et al., 2013). At 7 days, these hydrogels (predominantly being in rubbery state) may contribute to matric suction and hence the stabiliser content contributes to the measured suction (Fig. 5). Thereby, the combination...

... range from 0·07 to 2 W/(m.K), depending on the particle composition, soil texture and also moisture content. In this study, intact loess was sampled at shallow depth (1 m) in Northern France. Suction, volumetric moisture content and thermal conductivity of soil were measured simultaneously during...

...J. A. Cordero; G. Useche; P. C. Prat; A. Ledesma; J. C. Santamarina Recent macro- and particle-scale advances in unsaturated soil behaviour have led to an enhanced understanding of the effects of moisture changes on soil response. This research examines desiccation cracks as a suction–contraction...

...J. M. Espitia; B. Caicedo; L. Vallejo Poisson's ratio is an important parameter for the study of the behaviour of rocks in various contexts of rock engineering. Some studies have indicated that suction has an effect on Poisson's ratio of argillaceous rocks and that there is a non-linear response...