Seasonal Variations of a Subgrade Soil Resilient Modulus in Southern Brazil

Ceratti, Jorge Augusto Pereira; Gehling, Wai Ying Yuk; Núñez, Washington Peres

doi:10.3141/1874-18

Cited by 37 publications

(14 citation statements)

References 9 publications

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“…Based on the Meridian limestone aggregate stabilized with cement kiln dust, it is found out that the resilient modulus showed significant decrease as the number of wetting/drying cycles increased to 8, beyond which the resilient modulus decreased only slightly [47]. In addition, it reveals that the resilient modulus of the soil compacted at OMC may decrease up to four times by wetting and drying cycles [48].…”

Section: Cyclicmentioning

confidence: 96%

A Review on the Resilient Response of Unsaturated Subgrade Soils

Chu

2020

Advances in Civil Engineering

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Considering the great contribution of subgrade modulus to the overall performance of roads or railways, it is crucial to provide the best prediction of resilient modulus for their foundations. Incorporating the seasonal variation of moisture content, the resilient modulus variation of unsaturated soils will be accurately predicted. This paper aims to introduce and discuss the knowledge about resilient response of unsaturated soils and emphasize the effects of humidity. A literature review on resilient response of unsaturated soils is presented based on the previous studies. The affecting factors (i.e., wetting and drying, moisture content, and matric suction) were discussed. The prediction model development of the resilient response of unsaturated soils was presented. The limitations and advantages of the model were analyzed and compared. It reveals that the current models were limited regarding stress conditions, moisture content, matric suction, and soil types, and further studies are still needed to achieve a better understanding of resilient response of unsaturated soils.

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Section: Cyclicmentioning

confidence: 96%

A Review on the Resilient Response of Unsaturated Subgrade Soils

Chu

2020

Advances in Civil Engineering

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“…Edil and Motan (1979) suggested using suction as a fundamental parameter to rationally interpret the mechanical behavior of pavement materials. Several investigators interpreted the resilient behavior of pavement materials taking account the influence of suction and found the M R values increase non-linearly with respect to suction (e.g., Ceratti et al 2004, Gupta et al 2007, Khoury et al 2009, Ashtiani et al 2010. Comprehensive summary of the various models that were proposed during the last decade for predicting or estimating the M R taking account of the suction were summarized in Han and Vanapalli (2013a, b).…”

Section: Introductionmentioning

confidence: 97%

Predicting the Variation of Resilient Modulus with Respect to Suction Using the Soil-Water Characteristic Curve as a Tool

Han

Vanapalli

2014

Geo-Congress 2014 Technical Papers

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The resilient modulus (M R ), which is a key parameter in the design of pavements, is significantly influenced by the seasonal moisture variations and the resultant suction fluctuations. Several relationships or models are available in the literature for predicting or estimating the M R taking account the influence of moisture content or suction. In this paper, two models from the literature are used for providing comparisons between the measured and predicted M R values of a fine-grained soil compacted at three different initial water contents. The strengths and limitations of the two selected models are discussed. In addition, a semi-empirical model is proposed for predicting the variation of the M R with respect to suction using the soil-water characteristic curve (SWCC) as a tool. The proposed model is promising and can be used in the reliable prediction of the variation of the M R with respect to suction.

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“…Subgrade soils are usually compacted soils that typically stay in an unsaturated condition during their entire service life. The soil suction (), which contributes to the stiffness and strength of the soil body, is significantly influenced by moisture regime changes associated with the environmental factors (Quintus and Killingsworth 1998;Uzan 1998;Ceratti et al 2004). Sauer and Monismith (1968), Edris and Lytton (1976), Fredlund et al (1977), and Edil and Motan (1979) are pioneers who extended the mechanics of unsaturated soils for the interpretation and prediction of the variation of the M R with respect to the .…”

Section: Introductionmentioning

confidence: 99%

“…Measured and predicted (A) SWCC and (B) variation of M R with respect to for weathered shale from Brazil (data fromCeratti et al 2004).…”

mentioning

confidence: 99%

Model for predicting resilient modulus of unsaturated subgrade soil using soil-water characteristic curve

Han

Vanapalli

2015

Can. Geotech. J.

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Soil suction () is one of the key factors that influence the resilient modulus (M R ) of pavement subgrade soils. There are several models available in the literature for predicting the M R -correlations. However, the various model parameters required in the existing models are generally determined by performing regression analysis on extensive experimental data of the M Rrelationships, which are cumbersome, expensive, and time-consuming to obtain. In this paper, a model is proposed to predict the variation of the M R with respect to the for compacted fine-grained subgrade soils. The information of (i) the M R values at optimum moisture content condition (M ROPT ) and saturation condition (M RSAT ), which are typically determined for use in pavement design practice; (ii) the values at optimum moisture content condition ( OPT ); and (iii) the soil-water characteristic curve (SWCC) is required for using this model. The proposed model is validated by providing comparisons between the measured and predicted M R -relationships for 11 different compacted fine-grained subgrade soils that were tested following various protocols (a total of 16 sets of data, including 210 testing results). The proposed model was found to be suitable for predicting the variation of the M R with respect to the for all the subgrade soils using a single-valued model parameter , which was found to be equal to 2.0. The proposed model is promising for use in practice, as it only requires conventional soil properties and alleviates the need for experimental determination of the M R -relationships.Résumé : La succion des sols () est l'un des facteurs clés qui influence le module réversible (M R ) du sol de fondation des chaussées. Il existe plusieurs modèles dans la littérature pour prédire la corrélation entre M R et . Cependant, les différents paramètres nécessaires pour les modèles existants sont généralement évalués par des analyses de régression sur des ensembles substantiels de données expérimentales reliant le M R à ce qui est encombrant, coûteux et fastidieux à obtenir. Dans cet article, un modèle est proposé pour prédire la variation du M R en fonction de la pour des sols de fondation à grain fin compactés. Les informations dérivant de (i) les valeurs de M R à la teneur en eau optimale (M ROPT ) et à l'état de saturation (M RSAT ) qui sont généralement déterminées dans la pratique de la conception des chaussées conventionnelles, (ii) les valeurs de à la teneur en eau à optimale ( OPT ), et (iii) la courbe de rétention d'eau (CRE) sont nécessaires pour utiliser ce modèle. Le modèle proposé est validé à l'aide de comparaisons entre les valeurs mesurées et prévues de la relation M R -pour 11 différents sols de fondation à grains fins compactés qui ont été testés suivant divers protocoles (un total de 16 ensembles de données incluant 210 résultats). Le modèle proposé s'est révélé être approprié pour prédire la variation du M R en fonction de pour tous les sols de fondation au moyen d'un seul paramètre , qui s'est avéré être égal a 2.0. Le modè...

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Seasonal Variations of a Subgrade Soil Resilient Modulus in Southern Brazil

Cited by 37 publications

References 9 publications

A Review on the Resilient Response of Unsaturated Subgrade Soils

A Review on the Resilient Response of Unsaturated Subgrade Soils

Predicting the Variation of Resilient Modulus with Respect to Suction Using the Soil-Water Characteristic Curve as a Tool

Model for predicting resilient modulus of unsaturated subgrade soil using soil-water characteristic curve

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