Compaction behavior of nonwoven geotextile-reinforced clay
Journal
Geosynthetics International
Journal Volume
27
Journal Issue
1
Pages
16-33
Date Issued
2020
Author(s)
Abstract
This paper presents a series of compaction tests for investigating the compaction behavior of nonwoven geotextile-reinforced clay and the effects of permeable geotextiles on improvements in the density of reinforced clay. Specimens were compacted by varying the compaction energy, number of geotextile layers and compaction lift thickness. The compaction test results were analyzed from the pure soil between the reinforcement layers without including the thickness of embedded reinforcement layers. The test results indicate that the density of reinforced clay increased with the number of geotextile layers without significant changes in the optimum moisture content (OMC). Due to the reinforcing effect, up to 50% standard compaction energy could be saved when compacting the reinforced clay to achieve the same density as that of unreinforced clay. When the degree of saturation of soil was over 90%, water absorption in the reinforcement layers increased sharply, improving the effects of permeable geotextile on dissipation of the pore water pressure in the soil of the reinforced specimens. When the water content of reinforced soil was 6.7% higher than the OMC, the water absorption of the reinforcement layers reduced the void ratio of reinforced specimens under standard compaction energy by 4.5–5.5%.
SDGs
Type
journal article