Hydraulic Conductivity of Unsaturated Specimens of Lateritic Soil-Bentonite Mixtures
Accurate evaluation of unsaturated hydraulic conductivity (K unsat ) is critical in ensuring the reliability of the waste disposal structure. In this study, hydraulic conductivity of unsaturated specimens of compacted lateritic soil blended with bentonite at 0, 2.5, 5, 7.5 and 10% concentrations was...
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| Veröffentlicht in: | Geotechnical and geological engineering 2023-11, Vol.41 (8), p.4431-4444 |
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| creator | Amadi, A. A. Osinubi, K. J. Okoro, J. I. |
| description | Accurate evaluation of unsaturated hydraulic conductivity (K
unsat
) is critical in ensuring the reliability of the waste disposal structure. In this study, hydraulic conductivity of unsaturated specimens of compacted lateritic soil blended with bentonite at 0, 2.5, 5, 7.5 and 10% concentrations was determined by the Brooks & Corey-Burdine (BCB) and van Genuchten–Mualem (vGM) relative hydraulic conductivity expressions. The soil–water characteristic curve (SWCC) fitting parameters were obtained by the pressure plate procedure for all the formulated mixtures. Soil mixtures for the experiments were prepared at − 2, 0 and + 2% of optimum moisture content (OMC) using British Standard heavy, (BSH) compaction effort. Predicted K
unsat
of soil mixtures decreased nonlinearly with matric suction (ψ) from 6.44 × 10
–9
to 5.9 × 10
–15
m/s while the K
unsat
at the three moisture conditions decreased with higher compaction water content. As with K
sat
, the effect of the bentonite treatment was significant, with K
unsat
of treated specimens recording orders of magnitude lower than those of the natural soil. The disparity between predicted K
unsat
by the two models was almost negligible and agreed reasonably well with measured results in documented studies indicating that the models used could provide reasonable estimates or patterns of K
unsat
of the mixtures. |
| doi_str_mv | 10.1007/s10706-023-02524-3 |
| format | Article |
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unsat
) is critical in ensuring the reliability of the waste disposal structure. In this study, hydraulic conductivity of unsaturated specimens of compacted lateritic soil blended with bentonite at 0, 2.5, 5, 7.5 and 10% concentrations was determined by the Brooks & Corey-Burdine (BCB) and van Genuchten–Mualem (vGM) relative hydraulic conductivity expressions. The soil–water characteristic curve (SWCC) fitting parameters were obtained by the pressure plate procedure for all the formulated mixtures. Soil mixtures for the experiments were prepared at − 2, 0 and + 2% of optimum moisture content (OMC) using British Standard heavy, (BSH) compaction effort. Predicted K
unsat
of soil mixtures decreased nonlinearly with matric suction (ψ) from 6.44 × 10
–9
to 5.9 × 10
–15
m/s while the K
unsat
at the three moisture conditions decreased with higher compaction water content. As with K
sat
, the effect of the bentonite treatment was significant, with K
unsat
of treated specimens recording orders of magnitude lower than those of the natural soil. The disparity between predicted K
unsat
by the two models was almost negligible and agreed reasonably well with measured results in documented studies indicating that the models used could provide reasonable estimates or patterns of K
unsat
of the mixtures.</description><identifier>ISSN: 0960-3182</identifier><identifier>EISSN: 1573-1529</identifier><identifier>DOI: 10.1007/s10706-023-02524-3</identifier><language>eng</language><publisher>Cham: Springer International Publishing</publisher><subject>Bentonite ; Civil Engineering ; Compacted soils ; Compaction ; Curve fitting ; Earth and Environmental Science ; Earth Sciences ; Geotechnical Engineering & Applied Earth Sciences ; Hydraulic conductivity ; Hydraulics ; Hydrogeology ; Matric suction ; Mixtures ; Moisture content ; Moisture effects ; Original Paper ; Soil ; Soil compaction ; Soil mixtures ; Soil moisture ; Soil water ; Soils ; Terrestrial Pollution ; Waste disposal ; Waste Management/Waste Technology ; Water content</subject><ispartof>Geotechnical and geological engineering, 2023-11, Vol.41 (8), p.4431-4444</ispartof><rights>The Author(s), under exclusive licence to Springer Nature Switzerland AG 2023. 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><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c319t-2d391a83247e6a1de00b8ced4618be66dbf88b4ffa54d169b8ab6357438de6343</citedby><cites>FETCH-LOGICAL-c319t-2d391a83247e6a1de00b8ced4618be66dbf88b4ffa54d169b8ab6357438de6343</cites><orcidid>0000-0003-1220-3326</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10706-023-02524-3$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10706-023-02524-3$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Amadi, A. A.</creatorcontrib><creatorcontrib>Osinubi, K. J.</creatorcontrib><creatorcontrib>Okoro, J. I.</creatorcontrib><title>Hydraulic Conductivity of Unsaturated Specimens of Lateritic Soil-Bentonite Mixtures</title><title>Geotechnical and geological engineering</title><addtitle>Geotech Geol Eng</addtitle><description>Accurate evaluation of unsaturated hydraulic conductivity (K
unsat
) is critical in ensuring the reliability of the waste disposal structure. In this study, hydraulic conductivity of unsaturated specimens of compacted lateritic soil blended with bentonite at 0, 2.5, 5, 7.5 and 10% concentrations was determined by the Brooks & Corey-Burdine (BCB) and van Genuchten–Mualem (vGM) relative hydraulic conductivity expressions. The soil–water characteristic curve (SWCC) fitting parameters were obtained by the pressure plate procedure for all the formulated mixtures. Soil mixtures for the experiments were prepared at − 2, 0 and + 2% of optimum moisture content (OMC) using British Standard heavy, (BSH) compaction effort. Predicted K
unsat
of soil mixtures decreased nonlinearly with matric suction (ψ) from 6.44 × 10
–9
to 5.9 × 10
–15
m/s while the K
unsat
at the three moisture conditions decreased with higher compaction water content. As with K
sat
, the effect of the bentonite treatment was significant, with K
unsat
of treated specimens recording orders of magnitude lower than those of the natural soil. The disparity between predicted K
unsat
by the two models was almost negligible and agreed reasonably well with measured results in documented studies indicating that the models used could provide reasonable estimates or patterns of K
unsat
of the mixtures.</description><subject>Bentonite</subject><subject>Civil Engineering</subject><subject>Compacted soils</subject><subject>Compaction</subject><subject>Curve fitting</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Geotechnical Engineering & Applied Earth Sciences</subject><subject>Hydraulic conductivity</subject><subject>Hydraulics</subject><subject>Hydrogeology</subject><subject>Matric suction</subject><subject>Mixtures</subject><subject>Moisture content</subject><subject>Moisture effects</subject><subject>Original Paper</subject><subject>Soil</subject><subject>Soil compaction</subject><subject>Soil mixtures</subject><subject>Soil moisture</subject><subject>Soil water</subject><subject>Soils</subject><subject>Terrestrial Pollution</subject><subject>Waste disposal</subject><subject>Waste Management/Waste Technology</subject><subject>Water content</subject><issn>0960-3182</issn><issn>1573-1529</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp9kMFKAzEQhoMoWKsv4GnBc3SS7GazRy1qhYqHtueQ3cxKSrtbk6zYtzd1BW8ehoGZ_5uBj5BrBrcMoLwLDEqQFLhIVfCcihMyYUUpKCt4dUomUEmggil-Ti5C2AAAl8AmZDU_WG-GrWuyWd_ZoYnu08VD1rfZugsmDt5EtNlyj43bYReOi0UaeRcTsuzdlj5gF_vORcxe3VcCMFySs9ZsA1799ilZPz2uZnO6eHt-md0vaCNYFSm3omJGCZ6XKA2zCFCrBm0umapRSlu3StV525oit0xWtTK1FEWZC2VRilxMyc14d-_7jwFD1Jt-8F16qbmSUopKVmVK8THV-D4Ej63ee7cz_qAZ6KM9PdrTyZ7-sadFgsQIhRTu3tH_nf6H-gbapHMT</recordid><startdate>20231101</startdate><enddate>20231101</enddate><creator>Amadi, A. A.</creator><creator>Osinubi, K. J.</creator><creator>Okoro, J. I.</creator><general>Springer International Publishing</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TN</scope><scope>7UA</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>H96</scope><scope>HCIFZ</scope><scope>L.G</scope><scope>L6V</scope><scope>M7S</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><orcidid>https://orcid.org/0000-0003-1220-3326</orcidid></search><sort><creationdate>20231101</creationdate><title>Hydraulic Conductivity of Unsaturated Specimens of Lateritic Soil-Bentonite Mixtures</title><author>Amadi, A. A. ; Osinubi, K. J. ; Okoro, J. I.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c319t-2d391a83247e6a1de00b8ced4618be66dbf88b4ffa54d169b8ab6357438de6343</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Bentonite</topic><topic>Civil Engineering</topic><topic>Compacted soils</topic><topic>Compaction</topic><topic>Curve fitting</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>Geotechnical Engineering & Applied Earth Sciences</topic><topic>Hydraulic conductivity</topic><topic>Hydraulics</topic><topic>Hydrogeology</topic><topic>Matric suction</topic><topic>Mixtures</topic><topic>Moisture content</topic><topic>Moisture effects</topic><topic>Original Paper</topic><topic>Soil</topic><topic>Soil compaction</topic><topic>Soil mixtures</topic><topic>Soil moisture</topic><topic>Soil water</topic><topic>Soils</topic><topic>Terrestrial Pollution</topic><topic>Waste disposal</topic><topic>Waste Management/Waste Technology</topic><topic>Water content</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Amadi, A. A.</creatorcontrib><creatorcontrib>Osinubi, K. J.</creatorcontrib><creatorcontrib>Okoro, J. I.</creatorcontrib><collection>CrossRef</collection><collection>Oceanic Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><jtitle>Geotechnical and geological engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Amadi, A. A.</au><au>Osinubi, K. J.</au><au>Okoro, J. I.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hydraulic Conductivity of Unsaturated Specimens of Lateritic Soil-Bentonite Mixtures</atitle><jtitle>Geotechnical and geological engineering</jtitle><stitle>Geotech Geol Eng</stitle><date>2023-11-01</date><risdate>2023</risdate><volume>41</volume><issue>8</issue><spage>4431</spage><epage>4444</epage><pages>4431-4444</pages><issn>0960-3182</issn><eissn>1573-1529</eissn><abstract>Accurate evaluation of unsaturated hydraulic conductivity (K
unsat
) is critical in ensuring the reliability of the waste disposal structure. In this study, hydraulic conductivity of unsaturated specimens of compacted lateritic soil blended with bentonite at 0, 2.5, 5, 7.5 and 10% concentrations was determined by the Brooks & Corey-Burdine (BCB) and van Genuchten–Mualem (vGM) relative hydraulic conductivity expressions. The soil–water characteristic curve (SWCC) fitting parameters were obtained by the pressure plate procedure for all the formulated mixtures. Soil mixtures for the experiments were prepared at − 2, 0 and + 2% of optimum moisture content (OMC) using British Standard heavy, (BSH) compaction effort. Predicted K
unsat
of soil mixtures decreased nonlinearly with matric suction (ψ) from 6.44 × 10
–9
to 5.9 × 10
–15
m/s while the K
unsat
at the three moisture conditions decreased with higher compaction water content. As with K
sat
, the effect of the bentonite treatment was significant, with K
unsat
of treated specimens recording orders of magnitude lower than those of the natural soil. The disparity between predicted K
unsat
by the two models was almost negligible and agreed reasonably well with measured results in documented studies indicating that the models used could provide reasonable estimates or patterns of K
unsat
of the mixtures.</abstract><cop>Cham</cop><pub>Springer International Publishing</pub><doi>10.1007/s10706-023-02524-3</doi><tpages>14</tpages><orcidid>https://orcid.org/0000-0003-1220-3326</orcidid></addata></record> |
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| subjects | Bentonite Civil Engineering Compacted soils Compaction Curve fitting Earth and Environmental Science Earth Sciences Geotechnical Engineering & Applied Earth Sciences Hydraulic conductivity Hydraulics Hydrogeology Matric suction Mixtures Moisture content Moisture effects Original Paper Soil Soil compaction Soil mixtures Soil moisture Soil water Soils Terrestrial Pollution Waste disposal Waste Management/Waste Technology Water content |
| title | Hydraulic Conductivity of Unsaturated Specimens of Lateritic Soil-Bentonite Mixtures |
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