Effect of Soil Type on the Enzymatic Calcium Carbonate Precipitation Process Used for Soil Improvement
AbstractThis work analyzes the effect of soil type on the process of enzymatic calcium carbonate (CaCO3) precipitation. This methodology is tested for the stabilization of five soil types (poorly graded sand, two silty sands, a silty soil, and an organic soil) in order to examine the impact on stren...
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| Veröffentlicht in: | Journal of materials in civil engineering 2017-04, Vol.29 (4) |
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| creator | Oliveira, Paulo J. Venda Freitas, Luís D Carmona, João P. S. F |
| description | AbstractThis work analyzes the effect of soil type on the process of enzymatic calcium carbonate (CaCO3) precipitation. This methodology is tested for the stabilization of five soil types (poorly graded sand, two silty sands, a silty soil, and an organic soil) in order to examine the impact on strength and stiffness, based on the results of unconfined compression strength (UCS) and scanning electron microscopy (SEM) tests. The results of the UCS tests show that, in the case of the sandy and silty soils, the process of enzymatic calcium carbonate (CaCO3) precipitation potentiates the strengthening of the soils while, in the organic soil, a detrimental biostabilization impact is obtained. The SEM tests show the existence of vestiges of calcium in all the soils, which is a sign that the precipitation of CaCO3 does in fact occur but with a different impact on the strengthening for each soil type. The results suggest that the low pH value of the organic soil, combined with its organic coating of the soil particles, are the key factors that explain the inefficiency of the biostabilization process concerning this type of soil. |
| doi_str_mv | 10.1061/(ASCE)MT.1943-5533.0001804 |
| format | Article |
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Venda ; Freitas, Luís D ; Carmona, João P. S. F</creator><creatorcontrib>Oliveira, Paulo J. Venda ; Freitas, Luís D ; Carmona, João P. S. F</creatorcontrib><description>AbstractThis work analyzes the effect of soil type on the process of enzymatic calcium carbonate (CaCO3) precipitation. This methodology is tested for the stabilization of five soil types (poorly graded sand, two silty sands, a silty soil, and an organic soil) in order to examine the impact on strength and stiffness, based on the results of unconfined compression strength (UCS) and scanning electron microscopy (SEM) tests. The results of the UCS tests show that, in the case of the sandy and silty soils, the process of enzymatic calcium carbonate (CaCO3) precipitation potentiates the strengthening of the soils while, in the organic soil, a detrimental biostabilization impact is obtained. The SEM tests show the existence of vestiges of calcium in all the soils, which is a sign that the precipitation of CaCO3 does in fact occur but with a different impact on the strengthening for each soil type. The results suggest that the low pH value of the organic soil, combined with its organic coating of the soil particles, are the key factors that explain the inefficiency of the biostabilization process concerning this type of soil.</description><identifier>ISSN: 0899-1561</identifier><identifier>EISSN: 1943-5533</identifier><identifier>DOI: 10.1061/(ASCE)MT.1943-5533.0001804</identifier><language>eng</language><publisher>American Society of Civil Engineers</publisher><subject>Calcium carbonate ; Sand ; Scanning electron microscopy ; Silty soils ; Soil (material) ; Soil improvement ; Soil stabilization ; Soil strength ; Strengthening ; Technical Papers</subject><ispartof>Journal of materials in civil engineering, 2017-04, Vol.29 (4)</ispartof><rights>2016 American Society of Civil Engineers</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a513t-a792201694ebd99d001e821d84ac41506d2361e1ec10f22618bbe55c7564793d3</citedby><cites>FETCH-LOGICAL-a513t-a792201694ebd99d001e821d84ac41506d2361e1ec10f22618bbe55c7564793d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttp://ascelibrary.org/doi/pdf/10.1061/(ASCE)MT.1943-5533.0001804$$EPDF$$P50$$Gasce$$H</linktopdf><linktohtml>$$Uhttp://ascelibrary.org/doi/abs/10.1061/(ASCE)MT.1943-5533.0001804$$EHTML$$P50$$Gasce$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,76193,76201</link.rule.ids></links><search><creatorcontrib>Oliveira, Paulo J. Venda</creatorcontrib><creatorcontrib>Freitas, Luís D</creatorcontrib><creatorcontrib>Carmona, João P. S. F</creatorcontrib><title>Effect of Soil Type on the Enzymatic Calcium Carbonate Precipitation Process Used for Soil Improvement</title><title>Journal of materials in civil engineering</title><description>AbstractThis work analyzes the effect of soil type on the process of enzymatic calcium carbonate (CaCO3) precipitation. This methodology is tested for the stabilization of five soil types (poorly graded sand, two silty sands, a silty soil, and an organic soil) in order to examine the impact on strength and stiffness, based on the results of unconfined compression strength (UCS) and scanning electron microscopy (SEM) tests. The results of the UCS tests show that, in the case of the sandy and silty soils, the process of enzymatic calcium carbonate (CaCO3) precipitation potentiates the strengthening of the soils while, in the organic soil, a detrimental biostabilization impact is obtained. The SEM tests show the existence of vestiges of calcium in all the soils, which is a sign that the precipitation of CaCO3 does in fact occur but with a different impact on the strengthening for each soil type. The results suggest that the low pH value of the organic soil, combined with its organic coating of the soil particles, are the key factors that explain the inefficiency of the biostabilization process concerning this type of soil.</description><subject>Calcium carbonate</subject><subject>Sand</subject><subject>Scanning electron microscopy</subject><subject>Silty soils</subject><subject>Soil (material)</subject><subject>Soil improvement</subject><subject>Soil stabilization</subject><subject>Soil strength</subject><subject>Strengthening</subject><subject>Technical Papers</subject><issn>0899-1561</issn><issn>1943-5533</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqNkctKAzEUhoMoWC_vEFzVxdScyaUTd6XUC1QstK5DmjmDU2YmNZkK9elNqbgTXB1Ivv8PJx8hN8BGwBTcDSfL6ez2ZTUCLXgmJecjxhgUTJyQwe_ZKRmwQusMpIJzchHjJkGcCTYg1ayq0PXUV3Tp64au9lukvqP9O9JZ97VvbV87OrWNq3dtmmHtO9sjXQR09bbu03WiF8E7jJG-RSxp5cOx67ndBv-JLXb9FTmrbBPx-mdekreH2Wr6lM1fH5-nk3lmJfA-s2Od5wyUFrgutS7TKljkUBbCOgGSqTLnChDQAavyXEGxXqOUbiyVGGte8ksyPPamlz92GHvT1tFh09gO_S4aKDTXwJUs_oEqIYVQDP6BCsW1Vlon9P6IuuBjDFiZbahbG_YGmDkoM-agzLyszEGPOegxP8pSWB3DNrWbjd-FLn3Wb_Lv4DfQrZlB</recordid><startdate>20170401</startdate><enddate>20170401</enddate><creator>Oliveira, Paulo J. Venda</creator><creator>Freitas, Luís D</creator><creator>Carmona, João P. S. F</creator><general>American Society of Civil Engineers</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>20170401</creationdate><title>Effect of Soil Type on the Enzymatic Calcium Carbonate Precipitation Process Used for Soil Improvement</title><author>Oliveira, Paulo J. Venda ; Freitas, Luís D ; Carmona, João P. S. F</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a513t-a792201694ebd99d001e821d84ac41506d2361e1ec10f22618bbe55c7564793d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Calcium carbonate</topic><topic>Sand</topic><topic>Scanning electron microscopy</topic><topic>Silty soils</topic><topic>Soil (material)</topic><topic>Soil improvement</topic><topic>Soil stabilization</topic><topic>Soil strength</topic><topic>Strengthening</topic><topic>Technical Papers</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Oliveira, Paulo J. Venda</creatorcontrib><creatorcontrib>Freitas, Luís D</creatorcontrib><creatorcontrib>Carmona, João P. S. F</creatorcontrib><collection>CrossRef</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Journal of materials in civil engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Oliveira, Paulo J. Venda</au><au>Freitas, Luís D</au><au>Carmona, João P. S. F</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Soil Type on the Enzymatic Calcium Carbonate Precipitation Process Used for Soil Improvement</atitle><jtitle>Journal of materials in civil engineering</jtitle><date>2017-04-01</date><risdate>2017</risdate><volume>29</volume><issue>4</issue><issn>0899-1561</issn><eissn>1943-5533</eissn><abstract>AbstractThis work analyzes the effect of soil type on the process of enzymatic calcium carbonate (CaCO3) precipitation. This methodology is tested for the stabilization of five soil types (poorly graded sand, two silty sands, a silty soil, and an organic soil) in order to examine the impact on strength and stiffness, based on the results of unconfined compression strength (UCS) and scanning electron microscopy (SEM) tests. The results of the UCS tests show that, in the case of the sandy and silty soils, the process of enzymatic calcium carbonate (CaCO3) precipitation potentiates the strengthening of the soils while, in the organic soil, a detrimental biostabilization impact is obtained. The SEM tests show the existence of vestiges of calcium in all the soils, which is a sign that the precipitation of CaCO3 does in fact occur but with a different impact on the strengthening for each soil type. The results suggest that the low pH value of the organic soil, combined with its organic coating of the soil particles, are the key factors that explain the inefficiency of the biostabilization process concerning this type of soil.</abstract><pub>American Society of Civil Engineers</pub><doi>10.1061/(ASCE)MT.1943-5533.0001804</doi></addata></record> |
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| language | eng |
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| source | American Society of Civil Engineers:NESLI2:Journals:2014 |
| subjects | Calcium carbonate Sand Scanning electron microscopy Silty soils Soil (material) Soil improvement Soil stabilization Soil strength Strengthening Technical Papers |
| title | Effect of Soil Type on the Enzymatic Calcium Carbonate Precipitation Process Used for Soil Improvement |
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