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<p>The properties of chemically stabilized soil can be defined through mechanical characterization, particularly unconfined compressive strength (UCS), California bearing ratio (CBR), and modulus (E), which can be assessed using destructive and semi-destructive testing methods. There is a&#xa0;significant uncertainty about the consistency of UCS&#xa0;dependent correlations for determining modulus values in evaluating strength parameters through conventional methods. To assess soil strength parameters, several semi- and non-destructive techniques include the dynamic cone penetrometer (DCP), digital static cone penetrometer (DSCP), and lightweight deflectometer (LWD)&#xa0;testing devices are recognized for their precision and efficiency. This study aims to examine the behaviour of strength parameters before and after stabilization of soil with lime and cement in terms of (a) dynamic penetration index (DPI), (b) dynamic resistance (DR), (c) cone index (q<sub>c</sub>), and (d) dynamic deformation modulus (E<sub>LWD</sub>) obtained from DCPT, DSCPT, and LWD tests, respectively. In addition, a set of conventional tests was performed to determine the necessary quantity of additives for a mix design, such as UCS and CBR tests on soil samples containing 2–10% lime and cement with an increment of 2% for the prescribed curing periods. The results show that the addition of 6% lime and 8% cement enhanced the strength parameter (DR) from 11.54&#xa0;MPa to 27.96 &amp; 37.37&#xa0;MPa, and E<sub>LWD</sub> from 32.85 to 38.57 &amp; 38.7&#xa0;MPa for lime and cement stabilization, respectively, and the CBR values exhibited a similar trend. Their corresponding strength improvement factors (SIF) are in the range of 1.17–2.42 with respect to parameters such as E<sub>LWD</sub> and DR for the stabilized soils.</p>

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Characterization of Lime and Cement Stabilized Soil using DCPT, DSCPT, and LWD Devices

  • 期刊论文

  • 发表日期：

    2025年6月2日

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  • Prabodh Kumar Mahopatra,
  • Sidhu Ramulu Duddu,
  • Hariprasad Chennarapu

摘要

The properties of chemically stabilized soil can be defined through mechanical characterization, particularly unconfined compressive strength (UCS), California bearing ratio (CBR), and modulus (E), which can be assessed using destructive and semi-destructive testing methods. There is a significant uncertainty about the consistency of UCS dependent correlations for determining modulus values in evaluating strength parameters through conventional methods. To assess soil strength parameters, several semi- and non-destructive techniques include the dynamic cone penetrometer (DCP), digital static cone penetrometer (DSCP), and lightweight deflectometer (LWD) testing devices are recognized for their precision and efficiency. This study aims to examine the behaviour of strength parameters before and after stabilization of soil with lime and cement in terms of (a) dynamic penetration index (DPI), (b) dynamic resistance (DR), (c) cone index (qc), and (d) dynamic deformation modulus (ELWD) obtained from DCPT, DSCPT, and LWD tests, respectively. In addition, a set of conventional tests was performed to determine the necessary quantity of additives for a mix design, such as UCS and CBR tests on soil samples containing 2–10% lime and cement with an increment of 2% for the prescribed curing periods. The results show that the addition of 6% lime and 8% cement enhanced the strength parameter (DR) from 11.54 MPa to 27.96 & 37.37 MPa, and ELWD from 32.85 to 38.57 & 38.7 MPa for lime and cement stabilization, respectively, and the CBR values exhibited a similar trend. Their corresponding strength improvement factors (SIF) are in the range of 1.17–2.42 with respect to parameters such as ELWD and DR for the stabilized soils.