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Test Study on the Air Permeability of Remolded Q3 Malan Loess
https://orcid.org/https://orcid.org/0000-0002-2392-6629
https://orcid.org/https://orcid.org/0000-0001-8875-0348
https://orcid.org/https://orcid.org/0000-0002-1924-0368
https://orcid.org/https://orcid.org/0000-0003-3325-1570
https://orcid.org/https://orcid.org/0000-0003-3009-6448
https://orcid.org/https://orcid.org/0000-0003-0547-1250
Gas permeability is an important parameter in the determination of the pore structure characteristics of loess, especially in engineering fields such as earthwork and landfill cover treatment. With an improved ZC-2015 air permeameter, the air permeability (ka) testing under different water contents (w), dry densities (ρd) and wetting paths was conducted on remolded Q3 Malan loess from the Chanhe River area in Xi’an, Shaanxi, China. The results indicate that the ka of the remolded loess decreased rapidly as ρd increased and exhibited a relatively complex pattern as w increased. When w was less than the plastic limit (wp) and ρd was relatively low (1.35 g·cm−3, 1.45 g·cm−3), ka decreased as we increased. When ρd reached a certain value (1.50 g·cm−3, 1.65 g·cm−3), the ka-we curve exhibited a notable turning point. When ρd continued to increase 1.70 g·cm−3, ka decreased as we increased. The results of microscopic analysis, suggested that under the action of different water content and compaction, levels of aggregates and pore structures were formed. A Poulsen model was used to predict the ka and the test results were in relatively coincident with the calculation results, demonstrating that the Poulsen model is applicable.
Test Study on the Air Permeability of Remolded Q3 Malan Loess
https://orcid.org/https://orcid.org/0000-0002-2392-6629
https://orcid.org/https://orcid.org/0000-0001-8875-0348
https://orcid.org/https://orcid.org/0000-0002-1924-0368
https://orcid.org/https://orcid.org/0000-0003-3325-1570
https://orcid.org/https://orcid.org/0000-0003-3009-6448
https://orcid.org/https://orcid.org/0000-0003-0547-1250
Gas permeability is an important parameter in the determination of the pore structure characteristics of loess, especially in engineering fields such as earthwork and landfill cover treatment. With an improved ZC-2015 air permeameter, the air permeability (ka) testing under different water contents (w), dry densities (ρd) and wetting paths was conducted on remolded Q3 Malan loess from the Chanhe River area in Xi’an, Shaanxi, China. The results indicate that the ka of the remolded loess decreased rapidly as ρd increased and exhibited a relatively complex pattern as w increased. When w was less than the plastic limit (wp) and ρd was relatively low (1.35 g·cm−3, 1.45 g·cm−3), ka decreased as we increased. When ρd reached a certain value (1.50 g·cm−3, 1.65 g·cm−3), the ka-we curve exhibited a notable turning point. When ρd continued to increase 1.70 g·cm−3, ka decreased as we increased. The results of microscopic analysis, suggested that under the action of different water content and compaction, levels of aggregates and pore structures were formed. A Poulsen model was used to predict the ka and the test results were in relatively coincident with the calculation results, demonstrating that the Poulsen model is applicable.
Test Study on the Air Permeability of Remolded Q3 Malan Loess
https://orcid.org/https://orcid.org/0000-0002-2392-6629
https://orcid.org/https://orcid.org/0000-0001-8875-0348
https://orcid.org/https://orcid.org/0000-0002-1924-0368
https://orcid.org/https://orcid.org/0000-0003-3325-1570
https://orcid.org/https://orcid.org/0000-0003-3009-6448
https://orcid.org/https://orcid.org/0000-0003-0547-1250
Gas permeability is an important parameter in the determination of the pore structure characteristics of loess, especially in engineering fields such as earthwork and landfill cover treatment. With an improved ZC-2015 air permeameter, the air permeability (ka) testing under different water contents (w), dry densities (ρd) and wetting paths was conducted on remolded Q3 Malan loess from the Chanhe River area in Xi’an, Shaanxi, China. The results indicate that the ka of the remolded loess decreased rapidly as ρd increased and exhibited a relatively complex pattern as w increased. When w was less than the plastic limit (wp) and ρd was relatively low (1.35 g·cm−3, 1.45 g·cm−3), ka decreased as we increased. When ρd reached a certain value (1.50 g·cm−3, 1.65 g·cm−3), the ka-we curve exhibited a notable turning point. When ρd continued to increase 1.70 g·cm−3, ka decreased as we increased. The results of microscopic analysis, suggested that under the action of different water content and compaction, levels of aggregates and pore structures were formed. A Poulsen model was used to predict the ka and the test results were in relatively coincident with the calculation results, demonstrating that the Poulsen model is applicable.
Test Study on the Air Permeability of Remolded Q3 Malan Loess
KSCE J Civ Eng
KSCE Journal of Civil Engineering ; 25 ; 2824-2835
2021-08-01
12 pages
Article (Journal)
Electronic Resource
English
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