Multivariate Assessment of California Bearing Ratio with Contrasted Geotechnical Properties of Soils in Ilorin-Lokoja Highway

Fakeye, A.M.; Ige, Olusegun Omoniyi; Ogunsanwo, Olufemi

doi:10.5772/intechopen.93523

Cited by 4 publications

(6 citation statements)

References 8 publications

(7 reference statements)

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“…Therefore, the following gained equation represents the successful outcome of the conducted analysis: CBR = 4.32 -0.13662 PI -0.01607 PL + 0.26614 LL -0.13504 OMC + 8.563 MDD ……………. (6) The coefficient of correlation (R 2 ) and RMSE for the above equation are 0.82 and 1.47 respectively. Hence, the equation effectively correlates the CBR value with other soil properties.…”

Section: Multiple Regression Analysismentioning

confidence: 98%

Prediction of California Bearing Ratio from Consistency and Compaction Characteristics of Fine-grained Soils

Rashed

Salih²,

Abdalla

2021

NJES

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Soil’s characteristics are essential for the successful design of projects such as airports runway and flexible pavement. CBR (California Bering Ratio) is one of the significant soil characteristics for highways and airports projects. Thus, the CBR property can be used to determine the subgrade reaction of soil through correlations. Many of the soil geotechnical parameters such as compaction characteristics (Maximum Dry Density, MDD; Optimum Moisture Content, OMC), and consistency parameters (Liquid Limit, LL; Plastic Limit, PL; Plasticity Index, PI) can be in charge of changes that happen in soil CBR value. Soaked and/or non-soaked conditions of soils also affect CBR value. Hence, testing soils in a laboratory for CBR calculation is time-consuming that needs notable effort. Therefore, this study aims to generate some useful correlations for soil’s CBR with compaction and consistency parameters for 85 samples of fine-grained soils. The study trials were applied on natural soil samples of various places in Sulaimani Governorate, Northern Iraq. Statistical analysis has been carried out by using SPSS software (Version 28). Soaked CBR is counted, which is important for conditions such as rural roads that remain prone to water for few days. Based on the statistical analysis, there is a significant correlation between LL, PL, PI, MDD, and OMC with CBR as the dependent variable as a single variable equation with R2 of 0.7673, 0.5423, 0.5192, 0.6489, and 0.51, respectively. In addition, the highest value of R2 correlation was obtained between CBR value with consistency and compaction properties as a multiple regression equation with R2 of 0.82. The obtained equations for correlation purposes are successfully achieved and can be used, notably, to estimate CBR value.

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Section: Multiple Regression Analysismentioning

confidence: 98%

Prediction of California Bearing Ratio from Consistency and Compaction Characteristics of Fine-grained Soils

Rashed

Salih²,

Abdalla

2021

NJES

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“…The CBR value (< 30%) suggests that the soil may not withstand ground vibrations when vehicular load is applied and could be susceptible to erosion [47], hence requiring stabilisation. The Nigerian ministry of works and housing [48] specified a soaked CBR of greater than 30% for soil to be used as sub-base material and greater than 80% for road base material.…”

Section: Some Geotechnical Properties Of Unstabilized Lateritementioning

confidence: 99%

Strength Properties of Alkaline Activated Phosphoric Acid Stabilized Laterite

Ayodele

Akinniyi²,

Gbolade³

et al. 2022

ced

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This study investigated the effect of alkaline activation on the properties of Phosphoric Acid (PA) stabilized laterite. Maximum Dry Density (MDD), Optimum Moisture Content (OMC), California Bearing Ratio (CBR) and Unconfined Compressive Strength (UCS) of the laterite were determined to ascertain its suitability as a construction material. Laterite samples were stabilized with 1M and 2M PA at 5, 10 and 15%, respectively, by weight of dry soil. Some PA stabilized laterite were further mixed with an alkaline activator. All the stabilized laterites were moist cured for up to 14 days. The results show that the laterite was unsuitable as a road construction material in its natural state. The CBR of PA stabilized laterite improved with about 25%, while that with alkaline activation showed more improvement of up to 145%. The UCS of PA stabilized soil and that with alkaline activation increased with about 250% improvement. In conclusion, alkaline activation of phosphoric acid stabilized laterite soil for road construction has a great promise.

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“…Bayamack et al 10 and Fakeye et al 11 evaluated the determination of California Bearing Ratio in laterites with contrasting geotechnical properties using PCA. Xue-lei et al 12 used PCA in a study evaluating the impact of temperature and pressure on frozen soil strength.…”

Section: Introductionmentioning

confidence: 99%

Identification of geotechnical units in soil exploration through principal component analysis and clustering

San Roman Iturbide,

Botero Jaramillo

2024

Num Anal Meth Geomechanics

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Obtaining accurate information on soil characteristics is essential for large‐scale construction projects. Geotechnical exploration methods are commonly used to obtain information on soil characteristics. However, integrating the characteristics obtained through different exploration methods can be challenging. To address this problem, this study proposes the use of Principal Component Analysis (PCA) to combine geotechnical variables obtained from cone penetration tests (CPT), standard penetration tests (SPT) with soil sampling, and Suspension PS Logging tests. PCA and clustering analysis were applied to the data collected from a study area, and the results were highly effective in identifying the stratigraphy and soil type, leading to the definition of geotechnical units. This approach provides valuable information for geotechnical engineering projects, enhancing the accuracy of stratigraphic investigations and improving our understanding of soil characteristics and their influence on construction projects. Moreover, the proposed technique can be applied in other areas and different types of soils, making it a valuable tool for evaluating soil characteristics.

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Multivariate Assessment of California Bearing Ratio with Contrasted Geotechnical Properties of Soils in Ilorin-Lokoja Highway

Cited by 4 publications

References 8 publications

Prediction of California Bearing Ratio from Consistency and Compaction Characteristics of Fine-grained Soils

Prediction of California Bearing Ratio from Consistency and Compaction Characteristics of Fine-grained Soils

Strength Properties of Alkaline Activated Phosphoric Acid Stabilized Laterite

Identification of geotechnical units in soil exploration through principal component analysis and clustering

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