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Variation of Resilient Modulus, Strength, and Modulus of Elasticity of Stabilized Soils with Postcompaction Moisture Contents

Khoury, Naji / Brooks, Robert / Boeni, Santhoshini Yadav / Yada, Damodar

This study evaluated the effect of postcompaction moisture variations on the resilient modulus ( $M_{R}$ ), unconfined compressive strength (UCS), and modulus of elasticity ( $E$ ) of cementitiously stabilized subgrade soils. Class C fly ash (CFA) and hydrated lime were used as the stabilizing agents. Specimens were compacted at optimum moisture content ( $w_{opt}$ ) with different percentages of stabilizers (i.e., 10% CFA and 6% lime) and then either dried or wetted to different moisture contents prior to testing for $M_{R}$ , UCS, and $E$ . Results showed that $M_{R}$ , UCS, and $E$ values increased due to drying and decreased due to wetting. $M_{R}$ -moisture, UCS-moisture, and E-moisture models were developed and proved to be useful in predicting the variations of $M_{R}$ , UCS, and $E$ values of stabilized subgrade soils with moisture changes. These models can be used, in the new mechanistic-empirical pavement design approach (M-E PDG), to predict $M_{R}$ , UCS, and $E$ values of stabilized subgrade soils with moisture variations.

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Variation of Resilient Modulus, Strength, and Modulus of Elasticity of Stabilized Soils with Postcompaction Moisture Contents

Khoury, Naji / Brooks, Robert / Boeni, Santhoshini Yadav / Yada, Damodar

This study evaluated the effect of postcompaction moisture variations on the resilient modulus ( $M_{R}$ ), unconfined compressive strength (UCS), and modulus of elasticity ( $E$ ) of cementitiously stabilized subgrade soils. Class C fly ash (CFA) and hydrated lime were used as the stabilizing agents. Specimens were compacted at optimum moisture content ( $w_{opt}$ ) with different percentages of stabilizers (i.e., 10% CFA and 6% lime) and then either dried or wetted to different moisture contents prior to testing for $M_{R}$ , UCS, and $E$ . Results showed that $M_{R}$ , UCS, and $E$ values increased due to drying and decreased due to wetting. $M_{R}$ -moisture, UCS-moisture, and E-moisture models were developed and proved to be useful in predicting the variations of $M_{R}$ , UCS, and $E$ values of stabilized subgrade soils with moisture changes. These models can be used, in the new mechanistic-empirical pavement design approach (M-E PDG), to predict $M_{R}$ , UCS, and $E$ values of stabilized subgrade soils with moisture variations.

Variation of Resilient Modulus, Strength, and Modulus of Elasticity of Stabilized Soils with Postcompaction Moisture Contents

Khoury, Naji / Brooks, Robert / Boeni, Santhoshini Yadav / Yada, Damodar

This study evaluated the effect of postcompaction moisture variations on the resilient modulus ( $M_{R}$ ), unconfined compressive strength (UCS), and modulus of elasticity ( $E$ ) of cementitiously stabilized subgrade soils. Class C fly ash (CFA) and hydrated lime were used as the stabilizing agents. Specimens were compacted at optimum moisture content ( $w_{opt}$ ) with different percentages of stabilizers (i.e., 10% CFA and 6% lime) and then either dried or wetted to different moisture contents prior to testing for $M_{R}$ , UCS, and $E$ . Results showed that $M_{R}$ , UCS, and $E$ values increased due to drying and decreased due to wetting. $M_{R}$ -moisture, UCS-moisture, and E-moisture models were developed and proved to be useful in predicting the variations of $M_{R}$ , UCS, and $E$ values of stabilized subgrade soils with moisture changes. These models can be used, in the new mechanistic-empirical pavement design approach (M-E PDG), to predict $M_{R}$ , UCS, and $E$ values of stabilized subgrade soils with moisture variations.

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Title:

Variation of Resilient Modulus, Strength, and Modulus of Elasticity of Stabilized Soils with Postcompaction Moisture Contents

Contributors:

Khoury, Naji (author) / Brooks, Robert (author) / Boeni, Santhoshini Yadav (author) / Yada, Damodar (author)

Published in:

Journal of Materials in Civil Engineering ; 25 ; 160-166

Publication date:

2012-05-02

Size:

72013-01-01 pages

ISSN:

0899-1561 , 1943-5533

DOI:

https://doi.org/10.1061/(ASCE)MT.1943-5533.0000574

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

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