Evaluation of soil-nonwoven geotextile system behaviour using gradient ratio test
2006
Wojtasik, D. | Krzywosz, Z.,Szkola Glowna Gospodarstwa Wiejskiego, Warszawa (Poland). Katedra Geoinzynierii
The paper presents the scheme of modifed apparatus to test the local hydraulic gradient in soil-geotextile system according to ASTM D 5101. Based on the test results, gradient ratio in soil-nonwoven geotextile and gradient ratio in soil for internal unstable slightly clayey sands and nonwoven geotextile K-500 during fltration process under total hydraulic gradients i = 1-10 was carried out. The test results were analyzed for evaluation of using the nonwoven geotextile as a fltration layer according to clogging criteria, presented by Haliburton and Wood (1982).The analysis of tests' results showed, that nonwoven geotextile could be flter for protected internal unstable soils with no more than 27 percent fnes contents
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