Soil slaking under the effect of dispersants: characteristics and mechanism
The adhesion of clay to the cutterhead and cutters presents a significant challenge during earth pressure balance (EPB) shield excavation in clay strata. Dispersants are widely used to remove clay that adheres to metal surfaces, but their conditioning characteristics and working mechanisms have not...
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| Veröffentlicht in: | Environmental earth sciences 2024-07, Vol.83 (13), p.397-397, Article 397 |
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| creator | Wang, Shuying Zhu, Hanbiao Liu, Pengfei Qu, Tongming |
| description | The adhesion of clay to the cutterhead and cutters presents a significant challenge during earth pressure balance (EPB) shield excavation in clay strata. Dispersants are widely used to remove clay that adheres to metal surfaces, but their conditioning characteristics and working mechanisms have not yet been thoroughly investigated. This study investigated the effects of organic and inorganic dispersants on clay plasticity and slaking characteristics through Atterberg limit and slaking tests, complemented by Zeta potential and swelling tests to explore the underlying mechanisms. The results demonstrate that increasing the content of inorganic and organic dispersants reduces soil plasticity and enhances the slaking rate during the rapid development period in pure water. Dispersion slaking occurs in pure water for soil blocks treated with inorganic dispersant, while soil blocks treated with organic dispersant undergo primarily surface slaking. A higher organic dispersant concentration significantly intensified the slaking rate. In contrast, inorganic dispersant solutions inhibit soil slaking. Inorganic dispersant solutions impede soil expansion and slaking due to reduced electrostatic repulsion and increasing difficulty in water infiltration. Conversely, organic dispersant solutions accelerate soil slaking by promoting soil expansion and solution infiltration, reducing surface tension, and increasing pore air pressure. |
| doi_str_mv | 10.1007/s12665-024-11708-w |
| format | Article |
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Dispersants are widely used to remove clay that adheres to metal surfaces, but their conditioning characteristics and working mechanisms have not yet been thoroughly investigated. This study investigated the effects of organic and inorganic dispersants on clay plasticity and slaking characteristics through Atterberg limit and slaking tests, complemented by Zeta potential and swelling tests to explore the underlying mechanisms. The results demonstrate that increasing the content of inorganic and organic dispersants reduces soil plasticity and enhances the slaking rate during the rapid development period in pure water. Dispersion slaking occurs in pure water for soil blocks treated with inorganic dispersant, while soil blocks treated with organic dispersant undergo primarily surface slaking. A higher organic dispersant concentration significantly intensified the slaking rate. In contrast, inorganic dispersant solutions inhibit soil slaking. Inorganic dispersant solutions impede soil expansion and slaking due to reduced electrostatic repulsion and increasing difficulty in water infiltration. Conversely, organic dispersant solutions accelerate soil slaking by promoting soil expansion and solution infiltration, reducing surface tension, and increasing pore air pressure.</description><identifier>ISSN: 1866-6280</identifier><identifier>EISSN: 1866-6299</identifier><identifier>DOI: 10.1007/s12665-024-11708-w</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>adhesion ; atmospheric pressure ; Atterberg limits ; Biogeosciences ; Civil engineering ; Clay ; Dispersants ; Dredging ; Earth and Environmental Science ; Earth pressure ; Earth science ; Earth Sciences ; electrostatic interactions ; Environmental Science and Engineering ; Excavation ; Geochemistry ; Geology ; Hydrology/Water Resources ; Infiltration ; Metal surfaces ; Organic soils ; Original Article ; Plastic properties ; Plasticity ; Slaking ; Sodium ; Soil ; Soil dispersion ; Soil water ; Soils ; Surface tension ; Terrestrial Pollution ; Water infiltration ; Zeta potential</subject><ispartof>Environmental earth sciences, 2024-07, Vol.83 (13), p.397-397, Article 397</ispartof><rights>The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c347t-807f7034601f89938f1396b302be91276ffae4a2b3c30d0bd5f658a191e76d2d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s12665-024-11708-w$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s12665-024-11708-w$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27915,27916,41479,42548,51310</link.rule.ids></links><search><creatorcontrib>Wang, Shuying</creatorcontrib><creatorcontrib>Zhu, Hanbiao</creatorcontrib><creatorcontrib>Liu, Pengfei</creatorcontrib><creatorcontrib>Qu, Tongming</creatorcontrib><title>Soil slaking under the effect of dispersants: characteristics and mechanism</title><title>Environmental earth sciences</title><addtitle>Environ Earth Sci</addtitle><description>The adhesion of clay to the cutterhead and cutters presents a significant challenge during earth pressure balance (EPB) shield excavation in clay strata. Dispersants are widely used to remove clay that adheres to metal surfaces, but their conditioning characteristics and working mechanisms have not yet been thoroughly investigated. This study investigated the effects of organic and inorganic dispersants on clay plasticity and slaking characteristics through Atterberg limit and slaking tests, complemented by Zeta potential and swelling tests to explore the underlying mechanisms. The results demonstrate that increasing the content of inorganic and organic dispersants reduces soil plasticity and enhances the slaking rate during the rapid development period in pure water. Dispersion slaking occurs in pure water for soil blocks treated with inorganic dispersant, while soil blocks treated with organic dispersant undergo primarily surface slaking. A higher organic dispersant concentration significantly intensified the slaking rate. In contrast, inorganic dispersant solutions inhibit soil slaking. Inorganic dispersant solutions impede soil expansion and slaking due to reduced electrostatic repulsion and increasing difficulty in water infiltration. Conversely, organic dispersant solutions accelerate soil slaking by promoting soil expansion and solution infiltration, reducing surface tension, and increasing pore air pressure.</description><subject>adhesion</subject><subject>atmospheric pressure</subject><subject>Atterberg limits</subject><subject>Biogeosciences</subject><subject>Civil engineering</subject><subject>Clay</subject><subject>Dispersants</subject><subject>Dredging</subject><subject>Earth and Environmental Science</subject><subject>Earth pressure</subject><subject>Earth science</subject><subject>Earth Sciences</subject><subject>electrostatic interactions</subject><subject>Environmental Science and Engineering</subject><subject>Excavation</subject><subject>Geochemistry</subject><subject>Geology</subject><subject>Hydrology/Water Resources</subject><subject>Infiltration</subject><subject>Metal surfaces</subject><subject>Organic soils</subject><subject>Original Article</subject><subject>Plastic properties</subject><subject>Plasticity</subject><subject>Slaking</subject><subject>Sodium</subject><subject>Soil</subject><subject>Soil dispersion</subject><subject>Soil water</subject><subject>Soils</subject><subject>Surface tension</subject><subject>Terrestrial Pollution</subject><subject>Water infiltration</subject><subject>Zeta potential</subject><issn>1866-6280</issn><issn>1866-6299</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNp9kM1LxDAQxYMouOj-A54CXrxUJ02bJt5k8QsXPKjnkLbJbtZ-rJmWxf_eaEXBg3OZYfi9x-MRcsLgnAEUF8hSIfIE0ixhrACZ7PbIjEkhEpEqtf9zSzgkc8QNxOGMKxAz8vDU-4ZiY159t6JjV9tAh7Wl1jlbDbR3tPa4tQFNN-AlrdYmmGqwwePgK6Smq2lr47fz2B6TA2catPPvfURebq6fF3fJ8vH2fnG1TCqeFUMioXAF8EwAc1IpLl3MIkoOaWkVSwvhnLGZSUtecaihrHMncmmYYrYQdVrzI3I2-W5D_zZaHHTrsbJNYzrbj6g5y7nIQYkioqd_0E0_hi6m0xyEVBnPFEQqnagq9IjBOr0NvjXhXTPQnxXrqWIdK9ZfFetdFPFJhBHuVjb8Wv-j-gAU4X3r</recordid><startdate>20240701</startdate><enddate>20240701</enddate><creator>Wang, Shuying</creator><creator>Zhu, Hanbiao</creator><creator>Liu, Pengfei</creator><creator>Qu, Tongming</creator><general>Springer Berlin Heidelberg</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7TG</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope><scope>SOI</scope><scope>7S9</scope><scope>L.6</scope></search><sort><creationdate>20240701</creationdate><title>Soil slaking under the effect of dispersants: characteristics and mechanism</title><author>Wang, Shuying ; 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Dispersants are widely used to remove clay that adheres to metal surfaces, but their conditioning characteristics and working mechanisms have not yet been thoroughly investigated. This study investigated the effects of organic and inorganic dispersants on clay plasticity and slaking characteristics through Atterberg limit and slaking tests, complemented by Zeta potential and swelling tests to explore the underlying mechanisms. The results demonstrate that increasing the content of inorganic and organic dispersants reduces soil plasticity and enhances the slaking rate during the rapid development period in pure water. Dispersion slaking occurs in pure water for soil blocks treated with inorganic dispersant, while soil blocks treated with organic dispersant undergo primarily surface slaking. A higher organic dispersant concentration significantly intensified the slaking rate. In contrast, inorganic dispersant solutions inhibit soil slaking. Inorganic dispersant solutions impede soil expansion and slaking due to reduced electrostatic repulsion and increasing difficulty in water infiltration. Conversely, organic dispersant solutions accelerate soil slaking by promoting soil expansion and solution infiltration, reducing surface tension, and increasing pore air pressure.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s12665-024-11708-w</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | adhesion atmospheric pressure Atterberg limits Biogeosciences Civil engineering Clay Dispersants Dredging Earth and Environmental Science Earth pressure Earth science Earth Sciences electrostatic interactions Environmental Science and Engineering Excavation Geochemistry Geology Hydrology/Water Resources Infiltration Metal surfaces Organic soils Original Article Plastic properties Plasticity Slaking Sodium Soil Soil dispersion Soil water Soils Surface tension Terrestrial Pollution Water infiltration Zeta potential |
| title | Soil slaking under the effect of dispersants: characteristics and mechanism |
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