The influence of uniaxial tensile strain on the pore size and filtration characteristics of geotextiles

Prediction of pore size characteristics of woven slit-film geotextiles subjected to tensile strains

“…However, a wet sieving test was carried out by Wu et al (2008) to test the filtration opening size (FOS) under different levels of strains on two woven slit-film polypropylene geotextiles. Thus, the results of Wu et al (2008) were used to prove the practicability of the analytical solution. The two geotextiles tested by Wu et al were designated as W1 and W2, and their properties are provided in Table 4.…”

“…(2). The unstrained FOSs tested by Wu et al (2008) were taken as the values of b in Eq. (2) to calculate the slitfilm thicknesses of W1 and W2, which were obtained as 0.093 mm and 0.203 mm, respectively.…”

“…The experimental results were compared with the analytical predictions. Furthermore, the data of strained FOS tested by Wu et al (2008) were used to evaluate the analytical solutions. The experimental values obtained via image analysis and the values obtained by Wu et al correspond with the analytical predictions.…”

“…Fourie and Addis (1999) tested two woven slitfilm geotextiles of different thicknesses and found that the pore size of the thicker woven slit-film geotextile decreased with the increasing biaxial tensile loads, whereas the opposite result was found for the thinner specimen. Wu et al (2008) experimental results illustrated that the pore size and mean flow rate through woven slit-film geotextiles increase with increasing tensile strain. However, discrepancies still exist in the studies, and thus, further studies are still necessary.…”

“…The hydrodynamic sieving test and permeability test were adopted to determine pore size distribution (PSD), FOS and flow rate through woven slit-film geotextiles, respectively (Fourie and Kuchena, 1995;Addis, 1997, 1999). Wu et al (2008) used the wet sieving test and gradient ratio test to obtain the PSDs, FOS and GR values of strained woven slit-film geotextiles, respectively. However, there is still no analytical solution to predict the influence of tensile strain on the pore sizes in woven slit-film geotextiles.…”