Study on the dielectric properties and dielectric constant model of laterite

The soil dielectric constant model reflects the relationship between the volumetric water content and the dielectric constant. The ground penetrating radar (GPR) could quickly, precisely and non-destructively obtain the water state of the soil layers. A reasonable and reliable dielectric constant mo...

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Κύριοι συγγραφείς: Xingqian Xu, Haijun Wang, Xin Qu, Cheng Li, Bo Cai, Guangcan Peng
Μορφή: Άρθρο
Γλώσσα:English
Έκδοση: Frontiers Media S.A. 2022-11-01
Σειρά:Frontiers in Earth Science
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Διαθέσιμο Online:https://www.frontiersin.org/articles/10.3389/feart.2022.1035692/full
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author Xingqian Xu
Haijun Wang
Xin Qu
Cheng Li
Bo Cai
Guangcan Peng
author_facet Xingqian Xu
Haijun Wang
Xin Qu
Cheng Li
Bo Cai
Guangcan Peng
author_sort Xingqian Xu
collection DOAJ
description The soil dielectric constant model reflects the relationship between the volumetric water content and the dielectric constant. The ground penetrating radar (GPR) could quickly, precisely and non-destructively obtain the water state of the soil layers. A reasonable and reliable dielectric constant model is of great significance for predicting, monitoring and exploring water migration in soils. Taking Yunnan laterite as an example, this study comprehensively considered the key physical factors (dry density, water content, temperature) of the in situ laterite dielectric properties. The dielectric properties and the influencing factors of laterite has been discussed with the laboratory tests by reshaping laterite, and the dielectric constant model was finally proposed to evaluate the natural water state of the laterite. The results show that the relative dielectric constant of laterite increases gradually with the increasing volumetric water content, dry density and temperature respectively. The water content is the most important influencing factor, secondly followed by temperature and dry density. The dielectric constant model of laterite was built based on the influence of dry density and temperature on the relationship between the relative dielectric constant and volumetric water content. The proposed multivariate model has a good prediction effect on the water content of laterite, and the prediction effects compared with other existing models are as follows: Multivariate model, Zhao model, Malicki model, Zhou model, Topp model, Liao mode and Herkelrath model. This model could be applied to evaluate the plastic limit index and the liquid limit index using the relative dielectric constant, and then finally estimate the soft and hard state grades of laterite. This study could provide a reference for the construction of laterite dielectric constant models in different regions, and a convenient way for the estimation of the laterite water content state and engineering categories.
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spelling doaj.art-a9ba553cb15b44fc8d8e6c559d531f9d2022-12-22T03:58:28ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-11-011010.3389/feart.2022.10356921035692Study on the dielectric properties and dielectric constant model of lateriteXingqian Xu0Haijun Wang1Xin Qu2Cheng Li3Bo Cai4Guangcan Peng5College of Water Conservancy, Yunnan Agricultural University, Kunming, ChinaCollege of Water Conservancy, Yunnan Agricultural University, Kunming, ChinaSchool of Civil and Construction Engineering, Anyang Institute of Technology, Anyang, ChinaSchool of Architectural Engineering, Kaili University, Kaili, Guizhou, ChinaCollege of Water Conservancy, Yunnan Agricultural University, Kunming, ChinaCollege of Water Conservancy, Yunnan Agricultural University, Kunming, ChinaThe soil dielectric constant model reflects the relationship between the volumetric water content and the dielectric constant. The ground penetrating radar (GPR) could quickly, precisely and non-destructively obtain the water state of the soil layers. A reasonable and reliable dielectric constant model is of great significance for predicting, monitoring and exploring water migration in soils. Taking Yunnan laterite as an example, this study comprehensively considered the key physical factors (dry density, water content, temperature) of the in situ laterite dielectric properties. The dielectric properties and the influencing factors of laterite has been discussed with the laboratory tests by reshaping laterite, and the dielectric constant model was finally proposed to evaluate the natural water state of the laterite. The results show that the relative dielectric constant of laterite increases gradually with the increasing volumetric water content, dry density and temperature respectively. The water content is the most important influencing factor, secondly followed by temperature and dry density. The dielectric constant model of laterite was built based on the influence of dry density and temperature on the relationship between the relative dielectric constant and volumetric water content. The proposed multivariate model has a good prediction effect on the water content of laterite, and the prediction effects compared with other existing models are as follows: Multivariate model, Zhao model, Malicki model, Zhou model, Topp model, Liao mode and Herkelrath model. This model could be applied to evaluate the plastic limit index and the liquid limit index using the relative dielectric constant, and then finally estimate the soft and hard state grades of laterite. This study could provide a reference for the construction of laterite dielectric constant models in different regions, and a convenient way for the estimation of the laterite water content state and engineering categories.https://www.frontiersin.org/articles/10.3389/feart.2022.1035692/fulllateriterelative dielectric constantdielectric propertiesvolumetric water contentmodel
spellingShingle Xingqian Xu
Haijun Wang
Xin Qu
Cheng Li
Bo Cai
Guangcan Peng
Study on the dielectric properties and dielectric constant model of laterite
Frontiers in Earth Science
laterite
relative dielectric constant
dielectric properties
volumetric water content
model
title Study on the dielectric properties and dielectric constant model of laterite
title_full Study on the dielectric properties and dielectric constant model of laterite
title_fullStr Study on the dielectric properties and dielectric constant model of laterite
title_full_unstemmed Study on the dielectric properties and dielectric constant model of laterite
title_short Study on the dielectric properties and dielectric constant model of laterite
title_sort study on the dielectric properties and dielectric constant model of laterite
topic laterite
relative dielectric constant
dielectric properties
volumetric water content
model
url https://www.frontiersin.org/articles/10.3389/feart.2022.1035692/full
work_keys_str_mv AT xingqianxu studyonthedielectricpropertiesanddielectricconstantmodeloflaterite
AT haijunwang studyonthedielectricpropertiesanddielectricconstantmodeloflaterite
AT xinqu studyonthedielectricpropertiesanddielectricconstantmodeloflaterite
AT chengli studyonthedielectricpropertiesanddielectricconstantmodeloflaterite
AT bocai studyonthedielectricpropertiesanddielectricconstantmodeloflaterite
AT guangcanpeng studyonthedielectricpropertiesanddielectricconstantmodeloflaterite