Modification of Mechanical Properties of Expansive Soil from North China by Using Rice Husk Ash
The construction of buildings on expansive soils poses considerable risk of damage or collapse due to soil shrinkage or swelling made likely by the remarkable degree compressibility and weak shear resistance of such soils. In this research, rice husk ash (RHA) was added to expansive soil samples in...
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| Veröffentlicht in: | Materials 2021-05, Vol.14 (11), p.2789 |
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| description | The construction of buildings on expansive soils poses considerable risk of damage or collapse due to soil shrinkage or swelling made likely by the remarkable degree compressibility and weak shear resistance of such soils. In this research, rice husk ash (RHA) was added to expansive soil samples in different quantities of 0%, 4%, 8%, 12%, and 16% by weight of soil to determine their effects on the plasticity index, compaction parameters, consolidation performance, and California bearing ratio (CBR)of clay soil. The results show that the use of RHA increases the effective stress and decreases the void ratio and coefficient of consolidation. Adding 16% RHA resulted in the greatest reduction in the hydraulic conductivity, void ratio, and coefficient of consolidation. The void ratio decreased from 0.96 to 0.93, consolidation coefficient decreased from 2.52 to 2.33 cm2/s, and hydraulic conductivity decreased from 1.12 to 0.80 cm/s. The addition of RHA improved the soil properties and coefficient of consolidation due to the high density and cohesiveness of RHA. The results of this study can be used to provide a suitable basis for the treatment of expansive soil to provide improved conditions for infrastructure construction. |
| doi_str_mv | 10.3390/ma14112789 |
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M. ; Feng, Cheng-Pei ; Ahmed, Sara H. S.</creator><creatorcontrib>Taha, Mazahir M. M. ; Feng, Cheng-Pei ; Ahmed, Sara H. S.</creatorcontrib><description>The construction of buildings on expansive soils poses considerable risk of damage or collapse due to soil shrinkage or swelling made likely by the remarkable degree compressibility and weak shear resistance of such soils. In this research, rice husk ash (RHA) was added to expansive soil samples in different quantities of 0%, 4%, 8%, 12%, and 16% by weight of soil to determine their effects on the plasticity index, compaction parameters, consolidation performance, and California bearing ratio (CBR)of clay soil. The results show that the use of RHA increases the effective stress and decreases the void ratio and coefficient of consolidation. Adding 16% RHA resulted in the greatest reduction in the hydraulic conductivity, void ratio, and coefficient of consolidation. The void ratio decreased from 0.96 to 0.93, consolidation coefficient decreased from 2.52 to 2.33 cm2/s, and hydraulic conductivity decreased from 1.12 to 0.80 cm/s. The addition of RHA improved the soil properties and coefficient of consolidation due to the high density and cohesiveness of RHA. The results of this study can be used to provide a suitable basis for the treatment of expansive soil to provide improved conditions for infrastructure construction.</description><identifier>ISSN: 1996-1944</identifier><identifier>EISSN: 1996-1944</identifier><identifier>DOI: 10.3390/ma14112789</identifier><identifier>PMID: 34073888</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Ashes ; California bearing ratio ; Clay soils ; Coefficients ; Consolidation ; Construction ; Expansive soils ; Investigations ; Mechanical properties ; Moisture content ; Penetration tests ; Scanning electron microscopy ; Shear strength ; Soil compaction ; Soil compressibility ; Soil conditions ; Soil improvement ; Soil mechanics ; Soil properties ; Soil shrinkage ; Soil swelling ; Soils ; Void ratio</subject><ispartof>Materials, 2021-05, Vol.14 (11), p.2789</ispartof><rights>2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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M.</creatorcontrib><creatorcontrib>Feng, Cheng-Pei</creatorcontrib><creatorcontrib>Ahmed, Sara H. S.</creatorcontrib><title>Modification of Mechanical Properties of Expansive Soil from North China by Using Rice Husk Ash</title><title>Materials</title><description>The construction of buildings on expansive soils poses considerable risk of damage or collapse due to soil shrinkage or swelling made likely by the remarkable degree compressibility and weak shear resistance of such soils. In this research, rice husk ash (RHA) was added to expansive soil samples in different quantities of 0%, 4%, 8%, 12%, and 16% by weight of soil to determine their effects on the plasticity index, compaction parameters, consolidation performance, and California bearing ratio (CBR)of clay soil. The results show that the use of RHA increases the effective stress and decreases the void ratio and coefficient of consolidation. Adding 16% RHA resulted in the greatest reduction in the hydraulic conductivity, void ratio, and coefficient of consolidation. The void ratio decreased from 0.96 to 0.93, consolidation coefficient decreased from 2.52 to 2.33 cm2/s, and hydraulic conductivity decreased from 1.12 to 0.80 cm/s. The addition of RHA improved the soil properties and coefficient of consolidation due to the high density and cohesiveness of RHA. The results of this study can be used to provide a suitable basis for the treatment of expansive soil to provide improved conditions for infrastructure construction.</description><subject>Ashes</subject><subject>California bearing ratio</subject><subject>Clay soils</subject><subject>Coefficients</subject><subject>Consolidation</subject><subject>Construction</subject><subject>Expansive soils</subject><subject>Investigations</subject><subject>Mechanical properties</subject><subject>Moisture content</subject><subject>Penetration tests</subject><subject>Scanning electron microscopy</subject><subject>Shear strength</subject><subject>Soil compaction</subject><subject>Soil compressibility</subject><subject>Soil conditions</subject><subject>Soil improvement</subject><subject>Soil mechanics</subject><subject>Soil properties</subject><subject>Soil shrinkage</subject><subject>Soil swelling</subject><subject>Soils</subject><subject>Void ratio</subject><issn>1996-1944</issn><issn>1996-1944</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdUdtKxDAQDaK4svriFwR8EWE1l6ZNXgRZ1gt4Q93nkHSTbbRN1qQV_XtbXLzNywxzDoczcwDYx-iYUoFOGoUzjEnBxQbYwULkEyyybPPXPAJ7KT2jvijFnIhtMKIZKijnfAfIm7Bw1pWqdcHDYOGNKSvl-0UN72NYmdg6kwZg9r5SPrk3Ax-Dq6GNoYG3IbYVnFbOK6g_4Dw5v4QPrjTwsksv8CxVu2DLqjqZvXUfg_n57Gl6Obm-u7ianl1PSsppO-EF0YgURGDDLNK9t9xqpJnCmlmBte7NE1oaShmzjOUqN1ygBWFW2zwrDB2D0y_dVacbsyiNb6Oq5Sq6RsUPGZSTfxHvKrkMb5JjUfSv6gUO1wIxvHYmtbJxqTR1rbwJXZKE0TwT2WBjDA7-UZ9DF31_3sDqtTjhA-voi1XGkFI09tsMRnKITv5ERz8Bp9OJUQ</recordid><startdate>20210524</startdate><enddate>20210524</enddate><creator>Taha, Mazahir M. 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The results show that the use of RHA increases the effective stress and decreases the void ratio and coefficient of consolidation. Adding 16% RHA resulted in the greatest reduction in the hydraulic conductivity, void ratio, and coefficient of consolidation. The void ratio decreased from 0.96 to 0.93, consolidation coefficient decreased from 2.52 to 2.33 cm2/s, and hydraulic conductivity decreased from 1.12 to 0.80 cm/s. The addition of RHA improved the soil properties and coefficient of consolidation due to the high density and cohesiveness of RHA. The results of this study can be used to provide a suitable basis for the treatment of expansive soil to provide improved conditions for infrastructure construction.</abstract><cop>Basel</cop><pub>MDPI AG</pub><pmid>34073888</pmid><doi>10.3390/ma14112789</doi><orcidid>https://orcid.org/0000-0002-2543-4898</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Ashes California bearing ratio Clay soils Coefficients Consolidation Construction Expansive soils Investigations Mechanical properties Moisture content Penetration tests Scanning electron microscopy Shear strength Soil compaction Soil compressibility Soil conditions Soil improvement Soil mechanics Soil properties Soil shrinkage Soil swelling Soils Void ratio |
| title | Modification of Mechanical Properties of Expansive Soil from North China by Using Rice Husk Ash |
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