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Hydraulic conductivity of bentonite-HDTMA modified Loess by vs. HDTMA ratio (RB=10%)

Hydraulic conductivity of bentonite-HDTMA modified Loess by vs. HDTMA ratio (RB=10%)

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Fig. 1. HDTMA chemical structure
Fig. 2. Schematic diagram of flexible wall permeameter
Fig. 5. Hydraulic conductivity of bentonite-HDTMA modified Loess vs....
Fig. 6. Hydraulic conductivity of bentonite-HDTMA modified Loess by vs....
Fig. 7. Hydraulic conductivity of bentonite-HDTMA modified Loess vs....
Experimental Study on Impermeability of Loess Liner Mixed with Bentonite-HDTMA
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  • Oct 2022
Permeability tests are performed by using the flexible wall permeameter to study the influence of bentonite-HDTMA on the permeability performance of loess as a lining material in landfills. Results show, the impermeability of compacted Malan loess in the middle and lower reaches of the Yellow River in China does not meet the code requirement as a l...
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Context 1
... permeability test in this study is performed by using the flexible wall permeameter(show in Fig. 86 2). The permeation test was carried out at room temperature of 20 °C, with distilled water as the permeation 87 liquid, according to the China code. Compared with traditional rigid wall permeameter, the flexible wall 88 permeameter in this test can effectively avoid sidewall leakage by applying back pressure, shorten the test 89 time, ...
Context 2
... and the HDTMA ratio. As shown in Fig. 6, the hydraulic conductivity of modified Loess increased 200 from 9.52 × 10 -8 to 1.32 × 10 -6 cm·s -1 with the HDTMA ratio increasing from 0% to 4%. Overall, the 201 hydraulic conductivity of the modified Loess is increased after mixed with HDTMA, and the 202 impermeability performance is weakened. This is because the HDTMA can ...
Context 3
... particles easily disperse into the water phase until the colloidal state appears in the saturated state 205 (Sevim et al., 2005). The inherent aggregate structure of the soil is destroyed, and the soil particle is 206 dispersed. This can be reflected from the relationship between the plasticity index of modified Loess and 207 13 the HDTMA ratio (Fig. 6): the plasticity index of modified Loess increases with the HDTMA ratio 208 increasing. In addition, the strong interaction forces (mainly including hydrophobic forces and van der 209 Waals forces) are generated between HDTMA and soil particles ( Shanmugharaj et al., 2006), which can 210 further change the pore structure characteristics ...