Best-fit models for predicting the geotechnical properties of FA–stabilised problematic soils used as materials for earth structures

Ahmed, Billal Sari; Gadouri, Hamid; Ghrici, Mohamed; Harichane, Khelifa

doi:10.1080/10298436.2018.1517874

Cited by 14 publications

(4 citation statements)

References 67 publications

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“…The UCS of ES is one of the key designing variables employed for the design of roadway subgrade, particularly for highway embankment construction. Actually, it may be employed to endorse the efficacy of the soil improvement, to decide the maximum stabilizer dosage and to examine the significance of decisive factors on the strength of stabilized soil [48].…”

Section: Unconfined Compressive Strengthmentioning

confidence: 99%

“…The regression values of the LL, PI, MDD, OMC, UCS soaked/unsoaked, CBR soaked and unsoaked and FSI models are 0.99, 0.99, 0.99, 1.00, 0.91/0.95, 0.95/0.98, and 0.99 respectively. Sari Ahmed, et al [48] proposed mathematical models for LL, PI, UCS, FSI, MDD and OMC with determination coefficients of 0.92, 0.83, 0.84, 0.97, 0.87 and 0.86, respectively for the high plasticity clayey soils stabilized with fly ash. Thus, the models developed in this study give more accurate values.…”

Section: Plate Load Testmentioning

confidence: 99%

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Mechanism of improvement and best-fit models for the prediction of geotechnical properties of lime stabilized expansive soil used in pavement subgrade

Naveed,

Ahmed,

Ullah

et al. 2024

Mehran Univ. res. j. eng. technol.

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The performance of a pavement mainly depends on the quality of the subgrade layer. Expansive soils (ES) are extensively found worldwide including Pakistan. The inadequate strength and swelling behaviour of these soils are the main problems in any road construction project. Several researchers in the last decades have attempted to improve expansive soil utilizing various materials such as lime, brick kiln dust and fly ash. The purpose of this research was to evaluate the effect of lime on the engineering properties of the ES of a highway subgrade in the Sialkot region of Pakistan. The influence of different lime dosages (0%, 2%, 4% and 6%) at curing ages (1, 7, 14 and 28 days) has been examined by pH tests, plasticity tests, compaction tests, unconfined compressive strength (UCS), free swell index, and California Bearing Ratios (CBR). A field CBR and plate load test (PLT) on the natural soil and optimum lime-treated soil with various curing periods have been carried out for applicability as subgrade material. The test findings demonstrated that higher lime dosages increased the strength and ultimate bearing capacity (𝑞𝑢𝑙𝑡) of improved ES and at the same time decreased the free swelling index (FSI), optimum moisture content (OMC), maximum dry density (MDD) and permanent deformation of the subgrade soil. The UCS values of soil treated with 2%, 4% and 6% lime increased almost by 324%, 523%, and 249% for unsoaked samples and 285%, 351% and 231% for soaked samples respectively as compared to the plain soil at 28 days curing period. The laboratory CBR values significantly increased 2.35-8.50 times and field CBR improved 5.6 times as compared to the plain soil. The 𝑞𝑢𝑙𝑡 of lime-treated soil increased by 162% as compared to the plain soil and permanent deformation reduced from 33 mm to 2 mm after 28 days. Furthermore, equations were developed to estimate the best fit for the prediction of various geotechnical parameters and coefficient of determination (R2 ) values for all equations were found higher than 0.90. From the results, it has been concluded that adding the optimum lime content of 4% by weight satisfies the requirement for the subgrade construction of highways and the developed expressions can provide a scientific basis for estimating the geotechnical parameters.

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Section: Unconfined Compressive Strengthmentioning

confidence: 99%

Section: Plate Load Testmentioning

confidence: 99%

Mechanism of improvement and best-fit models for the prediction of geotechnical properties of lime stabilized expansive soil used in pavement subgrade

Naveed,

Ahmed,

Ullah

et al. 2024

Mehran Univ. res. j. eng. technol.

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“…For this reason, the consumption rate remains low, and storage is used as a solution. When previous studies were investigated, it was observed that construction demolition waste and fly ash were studied separately for soil stabilization [15][16][17][18][19][20][21]. It has been observed in the literature that Afşin-Elbistan fly ash, which is out of standard, is limited in use for soil stabilization.…”

Section: Introductionmentioning

confidence: 99%

“…Sari et al [19] and Hakan [20] added FA to cohesive soils at ratios of 0 to 25%. In the study, FA added to cohesive soil increased plasticity.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Earthquake Demolition Wastes and Afşin–Elbistan Fly Ash for Soil Improvement after the Kahramanmaraş Earthquake (6 February 2023)

Cinar

2024

Sustainability

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Türkiye is surrounded by active faults that have the potential to produce big earthquakes. Recently, one of these faults has become active. Two earthquakes of magnitude 7.7 and 7.6 occurred 9 h apart on 6 February 2023 in Kahramanmaraş. It is reported that 150 million tons of earthquake demolition waste (EDW) is estimated to be produced as a result of those natural hazards. This waste poses a serious risk to both the environment and human health. Its use in geotechnical applications will provide serious environmental benefits. In this study, Afşin–Elbistan fly ash (AEFA) and EDW were used to stabilize weak clayey soils in different proportions. Samples were prepared by separately adding 5, 10, 15, and 20% AEFA and EDW to high-plasticity clay. The AEFA used in this study was used because the production of AEFA is too high, and it is not used in concrete production because it does not comply with the standards and causes serious environmental problems for the region. The Atterberg limit, standard compaction, unconfined compression strength (UCS), triaxial, and California bearing ratio (CBR) tests were performed on soil samples, and samples were prepared from soil mixtures with various proportions of AEFA and EDW added. In addition, clay mixtures were prepared with EDW by keeping the AEFA ratio constant at 15% and their effects were also investigated. According to Atterberg test results, the natural soil class was determined as high-plasticity clay, the soil class of the mixtures created by adding EDW and AEFA was determined as low-plasticity clay, and all ternary mixtures were determined as low-plasticity silt. In addition, the maximum dry density increased for all mixtures, while the optimum water content decreased. A significant increase was observed in UCS test results, especially in ternary mixtures. While cohesion increased in AEFA mixtures, it decreased in ternary mixtures as the EDW ratio increased. It was observed that the internal friction angle increased in all mixtures. According to CBR test results, it was determined that the binary AEFA mixture ratio was 20%, the binary EDW mixture ratio was 10% and above, and all ratios of the ternary AEFA + EDW mixtures could be used as road sub-base material. After the major earthquake disaster, the use of EDW is of great importance for the environment. As a result, AEFA and EDW were found to enhance the geotechnical properties of clay.

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Assessment of Unconfined Compressive Strength of Stabilized Soil Using Artificial Intelligence Tools: A Scientometrics Review

Sari-Ahmed,

Ghrici,

Benzaamia

et al. 2024

Studies in Systems, Decision and Control

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Best-fit models for predicting the geotechnical properties of FA–stabilised problematic soils used as materials for earth structures

Cited by 14 publications

References 67 publications

Mechanism of improvement and best-fit models for the prediction of geotechnical properties of lime stabilized expansive soil used in pavement subgrade

Mechanism of improvement and best-fit models for the prediction of geotechnical properties of lime stabilized expansive soil used in pavement subgrade

Utilization of Earthquake Demolition Wastes and Afşin–Elbistan Fly Ash for Soil Improvement after the Kahramanmaraş Earthquake (6 February 2023)

Assessment of Unconfined Compressive Strength of Stabilized Soil Using Artificial Intelligence Tools: A Scientometrics Review

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