Adrian Eberemu | Ahmadu Bello University, Nigeria (original) (raw)

Papers by Adrian Eberemu

Proceedings of the 8th International Congress on Environmental Geotechnics Volume 3

MATEC Web of Conferences

A comparative study of soil-water characteristic curves (SWCCs) for compacted lateritic soil ̶ Ba... more A comparative study of soil-water characteristic curves (SWCCs) for compacted lateritic soil ̶ Bacillus coagulans (B. coagulans) mixtures for municipal solid waste (MSW) application was studied. Soil treatment was performed at approximately about one-third pore volume of the microbes (i.e., B. coagulans) for suspension densities of 0, 1.5×108, 6.0×108, 1.2×109, 1.8×109 and 2.4×109cells/ml, correspondingly. Soil specimens were prepared at optimum moisture content (OMC) of British Standard light (BSL) compaction energy. Cementation reagent was applied on the compacted soil and permitted to penetrate until partial saturation was achieved. A set-up of pressure plate extractor was employed to measure the volumetric water content, θ (VWC) in the laboratory for varying matric suctions with a minimum of 10 kPa up to a maximum of 1,500 kPa. The unsaturated hydraulic conductivity (UHC) and VWC were assessed using Brooks - Corey (BC) and Fredlund - Xing (FX) models. Largely, BC and FX models o...

Epitoanyag - Journal of Silicate Based and Composite Materials

Materials Science for Energy Technologies

The valorization of biomass-based solid wastes for both geotechnical engineering purposes and ene... more The valorization of biomass-based solid wastes for both geotechnical engineering purposes and energy needs has been reviewed to achieve eco-friendly, eco-efficient and sustainable engineering and reengi-neering of civil engineering materials and structures. The objective of this work was to review the procedure developed by SWI-NaOH-OCE Model for the valorization of biomass through controlled direct combustion and the sequestration of hydrogen gas for energy needs. The incineration model gave a lead to the sequestration of emissions released during the direct combustion of biomass and the subsequent entrapment of oxides of carbon and the eventual release of abundant hydrogen gas in the entrapment jar. The generation of geomaterials ash for the purpose of soil stabilization, concrete and asphalt modification has encouraged greenhouse emissions but eventually the technology that has been put in place has made it possible to manage and extract these emissions for energy needs. The contribution from researchers has shown that hydrogen sequestration from other sources requires high amount of energy because of the lower energy states of the compounds undergoing thermal decomposition. But this work has presented a more efficient approach to release hydrogen gas, which can easily be extracted and stored to meet the energy needs of the future as fuel cell batteries to power vehicles, mobile devices, robotic systems , etc. More so, the development of MXene as an exfoliated two-dimensional nanosheets with perme-ability and filtration selectivity properties, which are connected to its chemical composition and structure used in hydrogen gas extraction and separation from its molecular combination, has presented an efficient procedure for the production and management of hydrogen gas for energy purposes.

IOP Conference Series: Materials Science and Engineering

UMUDIKE JOURNAL OF ENGINEERING AND TECHNOLOGY

Strength characteristics of foundation soils in the six geo-political zones of Nigeria were evalu... more Strength characteristics of foundation soils in the six geo-political zones of Nigeria were evaluated based on standard penetration test (SPT) results using some conventional empirical/analytical models and the bearing capacity was predicted by numerical analysis using Plaxis 3D, a finite element application package. The SPT N-values were first corrected to the standard average energy of 60% (N60) before they were used to correlate soil properties. Evaluation of the soil properties were done at foundation embedment depths of 0.6, 2.1, 3.6, 5.1, 6.6, 8.1, 9.6, 11.1 and 12.6 m. The results of overconsolidation ratio, rigidity index, relative density, angle of internal resistance, undrained shear strength and unconfined compressive strength show that the strength characteristics of Nigerian soils is lowest on the average in the South South (SS) geo-political zone, followed by South West (SW), South East (SE), North East (NE), North West (NW) and the North Central (NC) geo-political zon...

Journal of Materials Research and Technology

The failure of pavement foundation materials as hydraulically bound materials is a worri-some con... more The failure of pavement foundation materials as hydraulically bound materials is a worri-some condition facing pavement infrastructures in the developing world. Capillary actionleads to swelling and shrinkage, compressive strength and durability problems, which resultfrom sorptivity as a function of hydraulic exposure conditions. Pavement infrastructures aconstantly interfaced with rise and fall of ground water level and capillary action hence astudy on the sorptivity behaviour of quarry dust (QD) treated soft clay soils was carriedout. Preliminary tests were conducted on the test materials for the purpose of charac-terization. The basic test results show that the test soils S1, S2 and S3 were classified asA-2-7, A-2-6 and A-7 soil groups respectively according to AASHTO classification system.Also, they were classified as poorly graded soils but test soils S1 and S2 were observed tobe of high clay content (CH) according to USCS. The test soils were equally observed tobe of highly plasticity and contains high free swell index properties, hence are expansive.

International Journal of Low-Carbon Technologies

Ecofriendly, ecoefficient and sustainable civil engineering work has been research with emphasis ... more Ecofriendly, ecoefficient and sustainable civil engineering work has been research with emphasis on adapting the byproducts of solid waste recycling and reuse to achieving infrastructural activities with low or zero carbon emission. The direction combustion model, the solid waste incinerator caustic soda oxides of carbon entrapment model (SWI-NaOH-OCEM) developed by this research has achieved a zero carbon release. This research adopted the literature search method to put together research results of previous works relevant to the aim of this present work. It has been shown that CO and CO2 emissions can be contained during the derivation of alternative or supplementary cementing materials used in the replacement of ordinary Portland cement in civil engineering works. In the overall assessment of the present review work has left the environment free of the hazards of CO and CO2 emissions. It was shown that these supplementary cementing materials derived from solid wastes improve the ...

Geotechnical and Geological Engineering

Geotechnical and Geological Engineering

Environmental Geotechnics

Geotechnical and Geological Engineering

Abstract A FORTRAN based first-order reliability program (FORM) was used to assess the suitabilit... more Abstract A FORTRAN based first-order reliability program (FORM) was used to assess the suitability of tropical black clay (known as black cotton soil) treated with locust bean waste ash (LBWA) mixtures as road pavement sub-base material. Soil was treated with up to 10% LBWA and compacted with British Standard light, BSL; West African Standard (WAS) and British Standard Heavy (BSH), energy. Laboratory results were used to generate a regression model for the reliability analysis using optimum moisture content of compaction (OMC) as dependent variable and the relevant soil parameters; LBWA; gravel content (GR); specific gravity (Gs); plasticity index (PI); sand content (Sa) and percentage fine (PF) as independent variables to compute reliability/safety indices. The results indicate that for the laboratory-based model, reliability index is sensitive to variability in all the soil parameters with the exception of PF which have constant safety index values. Results showed that locust bean waste ash, LBWA; GR; Gs, PI and Sa are greatly influenced by the coefficient of variation and therefore must be strictly controlled in LBWA treated black cotton soil for use as sub-base material in road pavement. Safety indices of -1.29 to -0.58, -0.041 to -0.415 and 1.33 to -0.224 were recorded for the effect of OMC on the reliability indices of BSL, WAS and BSH compaction energy respectively. Stochastically, results obtained did not produce acceptable safety index value of 1.0 as recommended by the Nordic Committee on Building Regulations. Therefore, more potent additives such as cement or lime are recommended to model optimum moisture content of compaction for black cotton soil–LBWA mixtures for use as sub-base material for road pavement.

This study was aimed at the development of a method that will assist in the calibration of load a... more This study was aimed at the development of a method that will assist in the calibration of load and resistance factors for service limit state with focus on the soils of the South-South geo-political zone of Nigeria (Akwa-Ibom, Bayelsa, Cross-River,Edo, Delta and Rivers states)based on standard penetration test (SPT) data. Reliability analysis expressed in the form of reliability index (β) and probability of failure (P f) was performed for foundation settlement using First Order Reliability Method (FORM) in MATLAB. The footings were designed for a 25 mm allowable settlement value as recommended in Eurocode 7 for the conventional serviceability limit state (SLS) design. Reliability indices were calculated based on the Burland and Burbidge foundation settlement prediction method. Results of the reliability analysis shows that, as the variability of geotechnical properties at a site increases, larger values of settlement were obtained with a higher probability of occurrence. Sensitivit...

International Journal of Engineering Research in Africa, Nov 30, 2011

Proceedings of the 8th International Congress on Environmental Geotechnics Volume 3

MATEC Web of Conferences

A comparative study of soil-water characteristic curves (SWCCs) for compacted lateritic soil ̶ Ba... more A comparative study of soil-water characteristic curves (SWCCs) for compacted lateritic soil ̶ Bacillus coagulans (B. coagulans) mixtures for municipal solid waste (MSW) application was studied. Soil treatment was performed at approximately about one-third pore volume of the microbes (i.e., B. coagulans) for suspension densities of 0, 1.5×108, 6.0×108, 1.2×109, 1.8×109 and 2.4×109cells/ml, correspondingly. Soil specimens were prepared at optimum moisture content (OMC) of British Standard light (BSL) compaction energy. Cementation reagent was applied on the compacted soil and permitted to penetrate until partial saturation was achieved. A set-up of pressure plate extractor was employed to measure the volumetric water content, θ (VWC) in the laboratory for varying matric suctions with a minimum of 10 kPa up to a maximum of 1,500 kPa. The unsaturated hydraulic conductivity (UHC) and VWC were assessed using Brooks - Corey (BC) and Fredlund - Xing (FX) models. Largely, BC and FX models o...

Epitoanyag - Journal of Silicate Based and Composite Materials

Materials Science for Energy Technologies

The valorization of biomass-based solid wastes for both geotechnical engineering purposes and ene... more The valorization of biomass-based solid wastes for both geotechnical engineering purposes and energy needs has been reviewed to achieve eco-friendly, eco-efficient and sustainable engineering and reengi-neering of civil engineering materials and structures. The objective of this work was to review the procedure developed by SWI-NaOH-OCE Model for the valorization of biomass through controlled direct combustion and the sequestration of hydrogen gas for energy needs. The incineration model gave a lead to the sequestration of emissions released during the direct combustion of biomass and the subsequent entrapment of oxides of carbon and the eventual release of abundant hydrogen gas in the entrapment jar. The generation of geomaterials ash for the purpose of soil stabilization, concrete and asphalt modification has encouraged greenhouse emissions but eventually the technology that has been put in place has made it possible to manage and extract these emissions for energy needs. The contribution from researchers has shown that hydrogen sequestration from other sources requires high amount of energy because of the lower energy states of the compounds undergoing thermal decomposition. But this work has presented a more efficient approach to release hydrogen gas, which can easily be extracted and stored to meet the energy needs of the future as fuel cell batteries to power vehicles, mobile devices, robotic systems , etc. More so, the development of MXene as an exfoliated two-dimensional nanosheets with perme-ability and filtration selectivity properties, which are connected to its chemical composition and structure used in hydrogen gas extraction and separation from its molecular combination, has presented an efficient procedure for the production and management of hydrogen gas for energy purposes.

IOP Conference Series: Materials Science and Engineering

UMUDIKE JOURNAL OF ENGINEERING AND TECHNOLOGY

Strength characteristics of foundation soils in the six geo-political zones of Nigeria were evalu... more Strength characteristics of foundation soils in the six geo-political zones of Nigeria were evaluated based on standard penetration test (SPT) results using some conventional empirical/analytical models and the bearing capacity was predicted by numerical analysis using Plaxis 3D, a finite element application package. The SPT N-values were first corrected to the standard average energy of 60% (N60) before they were used to correlate soil properties. Evaluation of the soil properties were done at foundation embedment depths of 0.6, 2.1, 3.6, 5.1, 6.6, 8.1, 9.6, 11.1 and 12.6 m. The results of overconsolidation ratio, rigidity index, relative density, angle of internal resistance, undrained shear strength and unconfined compressive strength show that the strength characteristics of Nigerian soils is lowest on the average in the South South (SS) geo-political zone, followed by South West (SW), South East (SE), North East (NE), North West (NW) and the North Central (NC) geo-political zon...

Journal of Materials Research and Technology

The failure of pavement foundation materials as hydraulically bound materials is a worri-some con... more The failure of pavement foundation materials as hydraulically bound materials is a worri-some condition facing pavement infrastructures in the developing world. Capillary actionleads to swelling and shrinkage, compressive strength and durability problems, which resultfrom sorptivity as a function of hydraulic exposure conditions. Pavement infrastructures aconstantly interfaced with rise and fall of ground water level and capillary action hence astudy on the sorptivity behaviour of quarry dust (QD) treated soft clay soils was carriedout. Preliminary tests were conducted on the test materials for the purpose of charac-terization. The basic test results show that the test soils S1, S2 and S3 were classified asA-2-7, A-2-6 and A-7 soil groups respectively according to AASHTO classification system.Also, they were classified as poorly graded soils but test soils S1 and S2 were observed tobe of high clay content (CH) according to USCS. The test soils were equally observed tobe of highly plasticity and contains high free swell index properties, hence are expansive.

International Journal of Low-Carbon Technologies

Ecofriendly, ecoefficient and sustainable civil engineering work has been research with emphasis ... more Ecofriendly, ecoefficient and sustainable civil engineering work has been research with emphasis on adapting the byproducts of solid waste recycling and reuse to achieving infrastructural activities with low or zero carbon emission. The direction combustion model, the solid waste incinerator caustic soda oxides of carbon entrapment model (SWI-NaOH-OCEM) developed by this research has achieved a zero carbon release. This research adopted the literature search method to put together research results of previous works relevant to the aim of this present work. It has been shown that CO and CO2 emissions can be contained during the derivation of alternative or supplementary cementing materials used in the replacement of ordinary Portland cement in civil engineering works. In the overall assessment of the present review work has left the environment free of the hazards of CO and CO2 emissions. It was shown that these supplementary cementing materials derived from solid wastes improve the ...

Geotechnical and Geological Engineering

Geotechnical and Geological Engineering

Environmental Geotechnics

Geotechnical and Geological Engineering

Abstract A FORTRAN based first-order reliability program (FORM) was used to assess the suitabilit... more Abstract A FORTRAN based first-order reliability program (FORM) was used to assess the suitability of tropical black clay (known as black cotton soil) treated with locust bean waste ash (LBWA) mixtures as road pavement sub-base material. Soil was treated with up to 10% LBWA and compacted with British Standard light, BSL; West African Standard (WAS) and British Standard Heavy (BSH), energy. Laboratory results were used to generate a regression model for the reliability analysis using optimum moisture content of compaction (OMC) as dependent variable and the relevant soil parameters; LBWA; gravel content (GR); specific gravity (Gs); plasticity index (PI); sand content (Sa) and percentage fine (PF) as independent variables to compute reliability/safety indices. The results indicate that for the laboratory-based model, reliability index is sensitive to variability in all the soil parameters with the exception of PF which have constant safety index values. Results showed that locust bean waste ash, LBWA; GR; Gs, PI and Sa are greatly influenced by the coefficient of variation and therefore must be strictly controlled in LBWA treated black cotton soil for use as sub-base material in road pavement. Safety indices of -1.29 to -0.58, -0.041 to -0.415 and 1.33 to -0.224 were recorded for the effect of OMC on the reliability indices of BSL, WAS and BSH compaction energy respectively. Stochastically, results obtained did not produce acceptable safety index value of 1.0 as recommended by the Nordic Committee on Building Regulations. Therefore, more potent additives such as cement or lime are recommended to model optimum moisture content of compaction for black cotton soil–LBWA mixtures for use as sub-base material for road pavement.

This study was aimed at the development of a method that will assist in the calibration of load a... more This study was aimed at the development of a method that will assist in the calibration of load and resistance factors for service limit state with focus on the soils of the South-South geo-political zone of Nigeria (Akwa-Ibom, Bayelsa, Cross-River,Edo, Delta and Rivers states)based on standard penetration test (SPT) data. Reliability analysis expressed in the form of reliability index (β) and probability of failure (P f) was performed for foundation settlement using First Order Reliability Method (FORM) in MATLAB. The footings were designed for a 25 mm allowable settlement value as recommended in Eurocode 7 for the conventional serviceability limit state (SLS) design. Reliability indices were calculated based on the Burland and Burbidge foundation settlement prediction method. Results of the reliability analysis shows that, as the variability of geotechnical properties at a site increases, larger values of settlement were obtained with a higher probability of occurrence. Sensitivit...

International Journal of Engineering Research in Africa, Nov 30, 2011