Title

LABORATORY EVALUATION OF THE MECHANICAL BEHAVIOR OF SOIL STABILIZED WITH KR SLAG AND PERFORMANCE PREDICTION USING MEDINA

LABORATORY EVALUATION OF THE MECHANICAL BEHAVIOR OF SOIL STABILIZED WITH KR SLAG AND PERFORMANCE PREDICTION USING MEDINA

Authorship

Magalhaes, Diego Correa; Bastos, Flávia Casagrande; Pires, Patrício José Moreira; Teixeira, Jamilla Emi Sudo Lutif

Magalhaes, Diego Correa

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Bastos, Flávia Casagrande

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Pires, Patrício José Moreira

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Teixeira, Jamilla Emi Sudo Lutif

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DOI

10.5151/5463-5463-35069

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Abstract

Road transport is the most used modal in Brazil, being essential to adequate sizing of pavement structure and control of its deformations. It is expected that this control starts in the project stage with characterization of stiffness and resistance to permanent deformation of materials used for correct design using performance prediction models. Since materials found in Espírito Santo have low strength, stabilization techniques are often used to improve mechanical characteristics of these materials. Steel by-products have been increasingly used as alternative materials for soil stabilization. Considering the above, the mechanical behavior of a clayey soil with addition of Kambara Reactor (KR) slag will be analyzed in this work. Laboratory tests of resilient modulus and permanent deformation were used in samples of pure soil and with the addition of KR for various curing times (7/14/28 days). Later, field performance predictions were made using the new national mechanistic-empirical method (MeDiNa). The use of KR slag in clayey soil resulted in an increase in resilient modulus, while longer curing times did not result in higher resilient modulus values. The incorporation of KR increased resistance to permanent deformation and longer curing time resulted in a greater reduction in such deformations. In MeDiNa, it was possible to verify that despite the solution not meeting the wheel track rutting design criteria, it is a viable option for use in pavements if properly designed.

Road transport is the most used modal in Brazil, being essential to adequate sizing of pavement structure and control of its deformations. It is expected that this control starts in the project stage with characterization of stiffness and resistance to permanent deformation of materials used for correct design using performance prediction models. Since materials found in Espírito Santo have low strength, stabilization techniques are often used to improve mechanical characteristics of these materials. Steel by-products have been increasingly used as alternative materials for soil stabilization. Considering the above, the mechanical behavior of a clayey soil with addition of Kambara Reactor (KR) slag will be analyzed in this work. Laboratory tests of resilient modulus and permanent deformation were used in samples of pure soil and with the addition of KR for various curing times (7/14/28 days). Later, field performance predictions were made using the new national mechanistic-empirical method (MeDiNa). The use of KR slag in clayey soil resulted in an increase in resilient modulus, while longer curing times did not result in higher resilient modulus values. The incorporation of KR increased resistance to permanent deformation and longer curing time resulted in a greater reduction in such deformations. In MeDiNa, it was possible to verify that despite the solution not meeting the wheel track rutting design criteria, it is a viable option for use in pavements if properly designed.

Keywords

Paving; Soil stabilization; Sizing; MeDiNa

Paving; Soil stabilization; Sizing; MeDiNa