Study of the permanent deformation of three soils employed in highway subgrades in the municipality of Santa Maria-RS, Brazil

Zago, João Paulo; Pinheiro, Rinaldo José Barbosa; Baroni, Magnos; Specht, Luciano Pivoto; Delongui, Lucas; Sagrilo, Amanda Vielmo

doi:10.1007/s42947-020-0129-6

Cited by 8 publications

(5 citation statements)

References 10 publications

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“…To determine the resilient parameters, two consolidated models, presented in Table 3, were used [43,[52][53][54][55][56][57][58], which correlate the applied stresses with experimentally determined constants. Non-linear multiple regressions were performed using the Statistica 10.0 software to verify the model that best represents the behavior of each condition.…”

Section: Mechanical Testsmentioning

confidence: 99%

Use of Phosphoric Acid and Rice Hulk Ash as Lateritic Soil Stabilizers for Paving Applications

et al. 2023

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Phosphoric acid (H3PO4) is a product that can be used as a stabilizing additive for tropical soils in an exploratory manner by the construction industry. For the drying process of this grain, its husks are used as fuel for ovens, generating rice husk ash (RHA), which is considered an environmental liability if not reused. In this sense, this paper aimed to evaluate the resilient behavior and the simple compressive strength, at different curing ages, of the use of rice husk ash and phosphoric acid in a simple and combined mixture for the stabilization of lateritic soil. The lateritic soil was mixed with different contents of RHA, H3PO4, and water and compacted in intermediate and modified Proctor energies. Fractured soil samples in the mechanical compressive strength tests were analysed by scanning electron microscopy and X-ray diffraction. The results show the potential for stabilization of the lateritic soil in question in terms of resilience and simple compressive strength through the addition of RHA and H3PO4 at different curing ages. The insertion of only H3PO4 produced the most satisfying resilient behavior. By adding RHA, the strength properties were improved, and good mixtures were obtained for use in paving.

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Section: Mechanical Testsmentioning

confidence: 99%

Use of Phosphoric Acid and Rice Hulk Ash as Lateritic Soil Stabilizers for Paving Applications

et al. 2023

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“…The subgrade layer constituent material is a lateritic clayey soil, according to MCT methodology, evaluated by Santos et al (2019) and Zago et al (2021). This material was classified as a low and medium plasticity inorganic clay, with low colloidal activity and clay predominance in its composition, according to Unified Soil Classification System (USCS), and characterized as a material with high volume change, framed in the group A-7-6, according to the classification of Transportation Research Board (TRB) (Santos et al 2019).…”

Section: Structures Constituent Materialsmentioning

confidence: 99%

“…To make use of this tool it was necessary to introduce parameters related to the resilient behavior and permanent deformation. Zago et al (2021) evaluated this behavior based on the repeats load triaxial tests performance used to obtain the resilient modulus (RM) and permanent deformation (PD), which are shown in Table 1.…”

Section: Structures Constituent Materialsmentioning

confidence: 99%

BR 287 Duplication Designed through the Methods of DNIT and MeDiNa (2020): Structural and Financial Analysis

Pascoal

Chiarello

Baroni

et al. 2022

Anu. Inst. Geociênc.

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The paving field has experienced extensive changes due to the growth of traffic. In order to attend this evolution, it became necessary the implementation of a new methodoly for pavement designing that uses a mechanistic-empirical approach. This paper aims to compare, structurally and financially, three structures, one designed using the DNIT’s method and two through “Método de Dimensionamento Nacional – MeDiNa”. The three structures were analyzed concerning the behavior in relation to permanent deformation, fatigue life and regarding the necessary investment to pave one-kilometer duplication of an existent highway. Even though the two structures designed through MeDiNa were find to be more expensive than the one designed using DNITs precepts, when considering the cost related to the number of load requests supported by the pavement, structures designed through MeDiNa proved to be more reliable in face of layers damage and presented a good cost per supported requests.

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“…Para aferir os parâmetros resilientes do solo, a normativa do DNIT 134 -ME -Solos -Determinação do Módulo de Resiliência regulamenta a utilização de amostras deformadas ou indeformadas. As amostras deformadas devem ser preparadas previamente e compactadas no molde tripartido para posterior realização do ensaio, conforme procedimento já abordado por Delongui et al (2018), Lima et al (2019), Guimarães et al (2018), Freitas et al (2020) e Zago et al (2020). Já as amostras indeformadas são obtidas através de exemplares escavados do subleito ou de camadas do pavimento, e devem apresentar dimensões próximas a de um corpo de prova compactado em laboratório (DNIT, 2018).…”

Section: Introductionunclassified

Extração de Amostras Indeformadas do Subleito da RS 342 e Avaliação do Comportamento Resiliente do Solo Laterítico Argiloso

Pascoal¹,

Sagrilo²,

Chiarello³

et al. 2022

Congresso Brasileiro De Mecânica Dos Solos E Engenharia Geotécnica

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Este estudo relata os procedimentos utilizados para a extração de amostras de solo indeformadas oriundas do subleito rodoviário da RS 342, localizada no município de Cruz Alta, com intuito de avaliar o comportamento resiliente do subleito. Amostras deformadas de solo foram coletadas e submetidas à classificação física (granulometria, peso específico, limites de Atterberg e classificação de solos SUCS, AASHTO e MCT), bem como ensaios de compactação na energia Proctor normal. O procedimento de esculpimento das amostras indeformadas foi explicitado no estudo. O ensaio de módulo de resiliência foi conduzido de acordo com a norma DNIT 134/2018 e o ajuste estatístico foi realizado pelos modelos de Svenson, Composto e Universal, demonstrando excelentes coeficientes de determinação para todos os casos. O valor de módulo de resiliência foi considerado baixo, devido ao material ter sido compactado em umidade muito superior a umidade ótima, contudo, considerado suficiente para aplicação no subleito.

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Study of the permanent deformation of three soils employed in highway subgrades in the municipality of Santa Maria-RS, Brazil

Cited by 8 publications

References 10 publications

Use of Phosphoric Acid and Rice Hulk Ash as Lateritic Soil Stabilizers for Paving Applications

Use of Phosphoric Acid and Rice Hulk Ash as Lateritic Soil Stabilizers for Paving Applications

BR 287 Duplication Designed through the Methods of DNIT and MeDiNa (2020): Structural and Financial Analysis

Extração de Amostras Indeformadas do Subleito da RS 342 e Avaliação do Comportamento Resiliente do Solo Laterítico Argiloso

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