Evaluation of index and compaction properties of lateritic soils treated with quarry dust based geopolymer cement for subgrade purpose

Onyelowe, Kennedy C.; Van, Duc Bui; Dao-Phuc, Lam; Onyelowe, Favour Deborah Adaugo; Ikpa, Chidozie; Ezugwu, Charles; Salahudeen, A. Bunyamin; Maduabuchi, Michael; Wogu, Jesuborn Obimba; Ibe, Kizito; Ihenna, Light

doi:10.14382/epitoanyag-jsbcm.2020.2

“…However, there are locations in which the limiting conditions were not met. Therefore, mechanical predensification and/or special treatments (mixing with coarse grain materials) [26][27][28][29] of the soils is recommended at these locations using soil compaction machines to reduce the compressibility of the soil before placing the concrete channel's foundation. This settlement problem is an issue of major concern at Chainages 1+000 -1+600 and 2+200 -3+000 as obvious from Table 3.…”

Section: Settlementmentioning

confidence: 99%

Settlement, slope stability and seepage analyses By Numerical Modelling Method and their applications in practice

Salahudeen,

Yisa

2023

Nig. J. Tech.

0

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The encountered situations during the design process of a gully erosion control site in Kano State are discussed in this article. The project was to design a rectangular concrete lined drainage channel with short side walls to efficiently convey flood water and prevent embankment erosion. Because of the embankment depth and soil type on the site which are mostly silty/clayey sand, settlement of the huge concrete channel, seepage and the unprotected embankment slope were issues of major concern. Settlement, slope stability and seepage analyses and designs were some of the several activities undertaken for the project. The anticipated total settlement prediction was performed by numerical simulation from which the differential settlement was then calculated. The prediction of the safety factor to determine the stability of the slope was performed by numerical simulation using SLOPE/W. The hydraulic velocity and rate of seepage prediction was performed by numerical modelling using SEEP/W. The use of numerical technique was specifically recommended by the consultants of the funder of the project, the World Bank. It was observed that numerical modelling technique provided accurate results of settlement, factor of safety, hydraulic velocity and rate of seepage and was therefore recommended for both research and practical applications.

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“…Ibrahim and Fourmont, Diambra et al [30][31] reported that cement-stabilized soil reinforced with fibers has a significantly higher potential to expand when compared to cement-stabilized soil. Onyelowe et al [32] stated that high plasticity is an undesirable property in construction materials.…”

Section: Plastic Limit Plmentioning

confidence: 99%

A Comparative Study on the Effect of Sisal Fibre and Waste Plastic Strips in Structural Strength Improvement of Tropical Black Clay

PAUL¹,

ABDULRAHMAN²,

KAZEEM³

et al. 2022

JESR

3

0

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A study on the effect of sisal fibre and waste plastic strips on tropical black clay (also called Black cotton soil, BCS) was carried out. Tests piloted on the natural and treated soil consist of California bearing ratio (CBR), Atterberg limits and compaction for different percentages inclusion of sisal fibre (0, 0.5, 1, 1.5 and 2%) and waste plastic strips (0, 0.5, 1, 1.5 and 2%) by dry weight of soil. Results obtained showed that the liquid limit of BCS initially fluctuated between 43.4% and 55.9% at 1% sisal fibre content, then dropped to 49.4% at 2% sisal fibre content. In the case soil treated with waste plastic strips, liquid values increased from 43.4% for the natural soil to a highest value of 58% at 1% waste plastic strips and thereafter decreased to 49.15% at 2% waste plastic strips content. Plastic limit for both BCS-sisal fibre/ waste plastic strips initially decreased from its natural value of 25.78 to 15.55 and 14.77% when treated with sisal fibre and waste plastic strips respectively at 0.5% admixtures content. In the case of plasticity index, values initially increase from its natural value of 17.66% to peak values of 35.39 and 43.23% for sisal fibre and waste plastic strips treated soil respectively, and thereafter decreased. Maximum dry density (MDD) initially increased from 1.55 mg/m3 at 0%, to 1.60 mg/m3 at 0.5% and thereafter decreased to 1.53 mg/m3 at 2% of fibre content. In the case of samples treated with waste plastic strips. The MDD progressively increased as the amount of waste plastic strips increased. OMC show an overall trend of increase for BCS treated with sisal fibre, and a general trend of decrease for soil treated with waste plastic strips. The CBR values initially lessened from their natural value of 13.59% to 4.76% at 1% sisal fibre and subsequently increased to 10.57% at 2% sisal fibre. Similar behaviour was observed for soil modified with waste plastic strips. Based on the results, BCS/waste plastic strips improved the soil more than BCS/sisal fibre treated soil and is recommended at optimal 2% waste plastic strips for geotechnical engineering application such as road payment.

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“…Using the expression trees given from Figures 6-9 for evaluating the CBR, UCS 28, and R Value of soils, respectively, decoding was done to derive the three simple mathematical expressions (equations ( 5)-( 7)) as follows: (7) e comparisons between the predicted and the observed expansive soil parameters are shown in Figure 10. e indicators indicate high accuracy can be observed for CBR, UCS 28, and R Value , with higher R 2 values for GEP formulated models.…”

Section: California Bearingmentioning

confidence: 99%

“…e design, construction, and monitoring of earthwork infrastructure have been of utmost importance due to the everyday failure civil engineering facilities experience [1][2][3][4]. For this reason, composite materials with special properties have been evolved to replace ordinary cement [5][6][7][8]. One such technique in the utilization of special binders is the introduction of activators to ash materials to form activated ash with the ability to resist unfavorable conditions and factors that have proven to be averse to constructed infrastructure [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Application of Gene Expression Programming to Evaluate Strength Characteristics of Hydrated-Lime-Activated Rice Husk Ash-Treated Expansive Soil

Onyelowe

¹

,

Jalal

²

,

Onyia

³

et al. 2021

Applied Computational Intelligence and Soft Computing

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Gene expression programming has been applied in this work to predict the California bearing ratio (CBR), unconfined compressive strength (UCS), and resistance value (R value or Rvalue) of expansive soil treated with an improved composites of rice husk ash. Pavement foundations suffer failures due to poor design and construction, poor materials handling and utilization, and management lapses. The evolution of sustainable green materials and optimization and soft computing techniques have been deployed to improve on the deficiencies being suffered in the abovementioned areas of design and construction engineering. In this work, expansive soil classified as A-7-6 group soil was treated with hydrated-lime activated rice husk ash (HARHA) in an incremental proportion to produce 121 datasets, which were used to predict the behavior of the soil’s strength parameters utilizing the mutative and evolutionary algorithms of GEP. The input parameters were HARHA, liquid limit ( w L ), (plastic limit w P , plasticity index I P , optimum moisture content ( w OMC ), clay activity (AC), and (maximum dry density (δmax) while CBR, UCS, and R value were the output parameters. A multiple linear regression (MLR) was also conducted on the datasets in addition to GEP to serve as a check mechanism. At the end of the computing and iterations, MLR and GEP optimization methods proposed three equations corresponding to the output parameters of the work. The responses validation on the predicted models shows a good correlation above 0.9 and a great performance index. The predicted models’ performance has shown that GEP soft computing has predicted models that can be used in the design of CBR, UCS, and R value for soils being used as foundation materials and being treated with admixtures as a binding component.

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Evaluation of index and compaction properties of lateritic soils treated with quarry dust based geopolymer cement for subgrade purpose

Cited by 10 publications

References 0 publications

Settlement, slope stability and seepage analyses By Numerical Modelling Method and their applications in practice

Settlement, slope stability and seepage analyses By Numerical Modelling Method and their applications in practice

A Comparative Study on the Effect of Sisal Fibre and Waste Plastic Strips in Structural Strength Improvement of Tropical Black Clay

Application of Gene Expression Programming to Evaluate Strength Characteristics of Hydrated-Lime-Activated Rice Husk Ash-Treated Expansive Soil

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