A Resistivity Plate Loading Device for Assessing the Factors Affecting the Stiffness of a Cement-Stabilized Subgrade
The extent of mixing in the stabilization process and the control of the cement content (<i>C</i>) and water content (<i>w</i>) in the mixture are key to the outcome of the engineering performance of a cement-stabilized subgrade. Intelligent Compaction (IC) quality control ha...
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MDPI AG
2022-05-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/10/3453 |
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| author | Huaiping Feng Ackah Frank Siaw Hailiang Wang |
| author_facet | Huaiping Feng Ackah Frank Siaw Hailiang Wang |
| author_sort | Huaiping Feng |
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| description | The extent of mixing in the stabilization process and the control of the cement content (<i>C</i>) and water content (<i>w</i>) in the mixture are key to the outcome of the engineering performance of a cement-stabilized subgrade. Intelligent Compaction (IC) quality control has improved quality control and management practices during construction. Intelligent Compaction Measurement Values (ICMVs) selected to evaluate the stiffness properties of cement-stabilized soils do not directly relate to the stiffness properties of the cement-stabilized subgrade and do not consider <i>w</i> and <i>C</i>. Additional tests need to be conducted for calibration of ICMVs. In this study, our solution is the development of a resistivity plate loading test. The resistivity plate loading test features the flexibility in determining the soil stiffness, <i>w</i>, <i>C,</i> and other important factors, such as the time of test effect (hydration) (<i>T</i>) and dry density (<i>ρ</i><sub>d</sub>). To verify the accuracy of the testing method, laboratory experimental studies were conducted on cemented soils considering <i>ρ</i><sub>d</sub>, <i>w</i>, <i>C,</i> and <i>T</i> at different factor levels. Multiple response studies based on grey rational analysis (GRA) were conducted. Analysis of the input factors was performed, and their effects on the measured responses were quantified. According to the study, the <i>ρ</i> measured by the device was a powerful indicator of stiffness, <i>ρ</i><sub>d</sub>, <i>w</i>, <i>C,</i> and <i>T</i><i>,</i> which showed that the device can be useful equipment for quality control and an advancement in the in situ testing technologies and test equipment. A statistical regression model based on the linear and linear plus interaction terms among the factors is proposed to predict the average responses. |
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| language | English |
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| publishDate | 2022-05-01 |
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| series | Materials |
| spelling | doaj.art-2345b3439efb4c22a6367c078de410db2023-11-23T11:55:34ZengMDPI AGMaterials1996-19442022-05-011510345310.3390/ma15103453A Resistivity Plate Loading Device for Assessing the Factors Affecting the Stiffness of a Cement-Stabilized SubgradeHuaiping Feng0Ackah Frank Siaw1Hailiang Wang2State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, ChinaKey Laboratory of Mechanical Behavior Evolution and Control of Traffic Engineering Structures in Hebei, Shijiazhuang Tiedao University, Shijiazhuang 050043, ChinaState Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, ChinaThe extent of mixing in the stabilization process and the control of the cement content (<i>C</i>) and water content (<i>w</i>) in the mixture are key to the outcome of the engineering performance of a cement-stabilized subgrade. Intelligent Compaction (IC) quality control has improved quality control and management practices during construction. Intelligent Compaction Measurement Values (ICMVs) selected to evaluate the stiffness properties of cement-stabilized soils do not directly relate to the stiffness properties of the cement-stabilized subgrade and do not consider <i>w</i> and <i>C</i>. Additional tests need to be conducted for calibration of ICMVs. In this study, our solution is the development of a resistivity plate loading test. The resistivity plate loading test features the flexibility in determining the soil stiffness, <i>w</i>, <i>C,</i> and other important factors, such as the time of test effect (hydration) (<i>T</i>) and dry density (<i>ρ</i><sub>d</sub>). To verify the accuracy of the testing method, laboratory experimental studies were conducted on cemented soils considering <i>ρ</i><sub>d</sub>, <i>w</i>, <i>C,</i> and <i>T</i> at different factor levels. Multiple response studies based on grey rational analysis (GRA) were conducted. Analysis of the input factors was performed, and their effects on the measured responses were quantified. According to the study, the <i>ρ</i> measured by the device was a powerful indicator of stiffness, <i>ρ</i><sub>d</sub>, <i>w</i>, <i>C,</i> and <i>T</i><i>,</i> which showed that the device can be useful equipment for quality control and an advancement in the in situ testing technologies and test equipment. A statistical regression model based on the linear and linear plus interaction terms among the factors is proposed to predict the average responses.https://www.mdpi.com/1996-1944/15/10/3453resistivity plate loading testwater contentcement hydrationsubgrade reaction modulus |
| spellingShingle | Huaiping Feng Ackah Frank Siaw Hailiang Wang A Resistivity Plate Loading Device for Assessing the Factors Affecting the Stiffness of a Cement-Stabilized Subgrade Materials resistivity plate loading test water content cement hydration subgrade reaction modulus |
| title | A Resistivity Plate Loading Device for Assessing the Factors Affecting the Stiffness of a Cement-Stabilized Subgrade |
| title_full | A Resistivity Plate Loading Device for Assessing the Factors Affecting the Stiffness of a Cement-Stabilized Subgrade |
| title_fullStr | A Resistivity Plate Loading Device for Assessing the Factors Affecting the Stiffness of a Cement-Stabilized Subgrade |
| title_full_unstemmed | A Resistivity Plate Loading Device for Assessing the Factors Affecting the Stiffness of a Cement-Stabilized Subgrade |
| title_short | A Resistivity Plate Loading Device for Assessing the Factors Affecting the Stiffness of a Cement-Stabilized Subgrade |
| title_sort | resistivity plate loading device for assessing the factors affecting the stiffness of a cement stabilized subgrade |
| topic | resistivity plate loading test water content cement hydration subgrade reaction modulus |
| url | https://www.mdpi.com/1996-1944/15/10/3453 |
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