Strength of pozzolan soil blend in chemically improved lateritic soil for pavement base material purpose

Onyelowe, Kennedy C.; Amhadi, Talal; Ezugwu, Charles; Ugwuanyi, Henry; Iro, Uzoma Ibe; Jideofor, Ifeoma; Amanamba, Ezenwa Chinenye; Van, Duc Bui; Salahudeen, A. Bunyamin; Sosa, Felix; Aririguzo, Julian C.; Igboayaka, Clifford; Orji, Francis; Ubachukwu, Obiekwe A.; Ikpa, Chidozie; Ugorji, Benjamin

doi:10.1093/ijlct/ctz035

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…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].…”

Section: Introductionmentioning

confidence: 99%

“…e working procedure of GP comprises various steps [24]: (1) create an initial population in accordance with the function and terminal settings; (2) use two key criteria, fitness function and maximum number of generations, to assess the performance of the generated population; if the performance of this population is according to the requirement or approaches the maximum number of the generation, terminate the program, otherwise, continuously generate a new population using three genetic operations of reproduction, crossover, and mutation for an amount of duration until the threshold criteria are not met. e experimental database was separated into training, validation, and testing set for the GEP analysis.…”

Section: Introductionmentioning

confidence: 99%

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

Onyelowe

Jalal

Onyia

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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Onyelowe

Jalal

Onyia

et al. 2021

Applied Computational Intelligence and Soft Computing

Self Cite

View full text Add to dashboard Cite

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“…The use of ordinary Portland cement (OPC) is associated with some environmental concerns [15] because cement production plays an important role in global warming, increased environmental damages and a significant increase in CO 2 emission [16,17] and increased generation of thermal energies. One of the primary solutions to the design and production of building materials is to use economically-feasible industrial byproducts and primary resources with the same properties of sustainable materials.…”

Section: Introductionmentioning

confidence: 99%

Investigating the properties of bentonite and kaolin modified concrete as a partial substitute to cement

2020

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Using pozzolanic materials in concrete manufacturing is intended as an optimal solution to lower the rate of greenhouse gas emission, and diminish energy resources and cement consumption. This study investigates the effect of using Semnan bentonite and kaolin as partial replacement for cement in low-strength concretes. A total of 18 mix designs along with a control specimen are prepared and compared. The main parameter is considered to be the changes in the ratio of bentonite, kaolin, and natural materials (furnace slag and gum vine-resin) to the cement weight. For better evaluation the water to cementitious materials ratio (W/C) and the fine aggregate percentage considered constant. To study properties of hardened concrete, compressive strength and splitting tensile strength tests were performed. According to the results of compressive strength test, using bentonite, kaolin, and other substances (furnace slag and natural resin) at 2/7% ratio by weight of cement, for a 400 kg/m 3 cement content, could improve the compressive strength by nearly 6%. However, at a lower cement content, the additives reduced the compressive strength and, consequently, the tensile strength. According to the results in mixtures containing bentonite, kaolin and natural materials (furnace slag and gum vine-resin) if the amount of bentonite, kaolin and natural materials is more than 2/7% by weight of cement, the tensile strength is reduced by 75% compared to CM. Accordingly, without cement, both compressive and tensile strength decreased drastically. It was decided that pozzolanic materials cannot be used alone, and their role must be limited to that of a partial substitute. Specimens with 400 kg/m 3 cement offered an acceptable compressive strength for low-rise structures.

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A state of review: challenges and techniques of laterite soil stabilisation using chemical, economical, and eco-friendly materials

Ezreig

Ismail

Ehwailat

2022

Innov. Infrastruct. Solut.

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Strength of pozzolan soil blend in chemically improved lateritic soil for pavement base material purpose

Cited by 7 publications

References 14 publications

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

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

Investigating the properties of bentonite and kaolin modified concrete as a partial substitute to cement

A state of review: challenges and techniques of laterite soil stabilisation using chemical, economical, and eco-friendly materials

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