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Incorporation of a nanotechnology-based product in cementitious binders for sustainable mitigation of sulphate-induced heaving of stabilised soils (2020)
Journal Article
Eyo, E. U., Abbey, S. J., Ngambi, S., Ganjian, E., & Coakley, E. (in press). Incorporation of a nanotechnology-based product in cementitious binders for sustainable mitigation of sulphate-induced heaving of stabilised soils. International Journal of Engineering Science and Technology, https://doi.org/10.1016/j.jestch.2020.09.002

Sulphate-induced heaving in soils is a common problem caused mostly by the use of calcium-based binders in the stabilisation of sulphate-bearing soils. Sulphate-induced heaving is attributed to precipitation and growth of ettringite minerals in a hig... Read More about Incorporation of a nanotechnology-based product in cementitious binders for sustainable mitigation of sulphate-induced heaving of stabilised soils.

An overview of soil–water characteristic curves of stabilised soils and their influential factors (2020)
Journal Article
Eyo, E. U., Ng'ambi, S., & Abbey, S. J. (in press). An overview of soil–water characteristic curves of stabilised soils and their influential factors. Journal of King Saud University (Engineering Science), https://doi.org/10.1016/j.jksues.2020.07.013

Since unsaturated soil conditions are normally experienced above the groundwater table, most treated or stabilised soils for roadworks, earth dams’ embankments, landfill sites, hydraulic barriers etc. could be regarded as existing in this region. The... Read More about An overview of soil–water characteristic curves of stabilised soils and their influential factors.

Incorporation of a nanotechnology-based additive in cementitious products for clay stabilisation (2020)
Journal Article
Eyo, E. U., Ng'ambi, S., & Abbey, S. J. (2020). Incorporation of a nanotechnology-based additive in cementitious products for clay stabilisation. Journal of Rock Mechanics and Geotechnical Engineering, 12(5), 1056-1069. https://doi.org/10.1016/j.jrmge.2019.12.018

The mechanical performances and water retention characteristics of clays, stabilised by partial substitution of cement with by-products and inclusion of a nanotechnology-based additive called RoadCem (RC), are studied in this research. The unconfined... Read More about Incorporation of a nanotechnology-based additive in cementitious products for clay stabilisation.

Mechanical properties and microstructure of fibre-reinforced clay blended with by-product cementitious materials (2020)
Journal Article
Abbey, S. J., Eyo, E. U., Oti, J., Amakye, S. Y., & Ngambi, S. (2020). Mechanical properties and microstructure of fibre-reinforced clay blended with by-product cementitious materials. Geosciences, 10(6), 241. https://doi.org/10.3390/geosciences10060241

Clayey soils endure adverse changes in strength and volume due to seasonal changes in moisture content and temperature. It has been well recognised that high cement content has been successfully employed in improving the mechanical properties of clay... Read More about Mechanical properties and microstructure of fibre-reinforced clay blended with by-product cementitious materials.

Performance of clay stabilized by cementitious materials and inclusion of zeolite/alkaline metals-based additive (2020)
Journal Article
Eyo, E. U., Ng'ambi, S., & Abbey, S. J. (2020). Performance of clay stabilized by cementitious materials and inclusion of zeolite/alkaline metals-based additive. Transportation Geotechnics, 23, https://doi.org/10.1016/j.trgeo.2020.100330

RoadCem (RC) is a by-product additive produced based on nanotechnology and comprises of synthetic zeolites and alkali earth metals as some of its components. The geotechnical properties of a soil stabilized by adding RC to partly replaced cementitiou... Read More about Performance of clay stabilized by cementitious materials and inclusion of zeolite/alkaline metals-based additive.

Swell and microstructural characteristics of high-plasticity clay blended with cement (2019)
Journal Article
Abbey, S. J., Eyo, E. U., & Ngambi, S. (2020). Swell and microstructural characteristics of high-plasticity clay blended with cement. Bulletin of Engineering Geology and the Environment, 79, 2119-2130. https://doi.org/10.1007/s10064-019-01621-z

This study presents the effect of high plasticity on swell potential, swelling pressure and micro structural characteristics of kaolinite-bentonite mixed clays. Five different combining ratios of kaolinite bentonite mixture of 100:0, 90:10, 75:25, 50... Read More about Swell and microstructural characteristics of high-plasticity clay blended with cement.

Effect of organic matter on swell and undrained shear strength of treated soils (2019)
Journal Article
Abbey, S. J., Omotayo Olubanwo, A., Ngambi, S., Umo Eyo, E., & Adeleke, B. O. (2019). Effect of organic matter on swell and undrained shear strength of treated soils. Journal of Civil, Construction and Environmental Engineering, 4(2), 48-58. https://doi.org/10.11648/j.jccee.20190402.12

This paper presents a laboratory and statistical study on swell and undrained shear strength of cemented organic clays blended with eco-friendly (by-product) cementitious materials such as ground granulated blast slag (GGBS) and cement kiln dust (CKD... Read More about Effect of organic matter on swell and undrained shear strength of treated soils.

Numerical investigation of tension reinforcement lap length of eurocode 2 using a four-point beam loading system (2019)
Journal Article
Adeleke, B. O., Abbey, S. J., & Olubanwo, A. O. (2019). Numerical investigation of tension reinforcement lap length of eurocode 2 using a four-point beam loading system. Latin American Journal of Solids and Structures, 16(5), https://doi.org/10.1590/1679-78255532

© 2019 Latin American Journal of Solids and Structures. All rights reserved. This report presents a computational research on Eurocode 2 (EC2) tension lap lengths (lo) design in a normally reinforced concrete beam, using ANSYS Workbench simulation so... Read More about Numerical investigation of tension reinforcement lap length of eurocode 2 using a four-point beam loading system.

Dynamic analysis of Footbridge to Eurocode (case study on Leventis Footbridge, Aba Road, Port Harcourt) (2019)
Journal Article
Ngekpe, B. E., Gualo, C., & Abbey, S. J. (2019). Dynamic analysis of Footbridge to Eurocode (case study on Leventis Footbridge, Aba Road, Port Harcourt). Jordan Journal of Civil Engineering, 13(1),

This research project presents a dynamic structural analysis of footbridges as per Eurocode (case study on Leventis Footbridge, Aba Road, Port Harcourt). The footbridge was simulated using a commercial finite element software; Midas FEA. The crowd-fo... Read More about Dynamic analysis of Footbridge to Eurocode (case study on Leventis Footbridge, Aba Road, Port Harcourt).

Development of improved models for estimation of bursting stresses in elements under high-concentrated load (2018)
Journal Article
Boye, B. A., Abbey, S. J., Ngambi, S., & Fonte, J. (2019). Development of improved models for estimation of bursting stresses in elements under high-concentrated load. Latin American Journal of Solids and Structures, 16(1), 1-15. https://doi.org/10.1590/1679-78255031

© 2019, Brazilian Association of Computational Mechanics. All rights reserved. In precast concrete segmental tunnels, radial and circumferential joints are often the most highly stressed parts and it is therefore important to use appropriate equation... Read More about Development of improved models for estimation of bursting stresses in elements under high-concentrated load.

Effect of intrinsic microscopic properties and suction on swell characteristics of compacted expansive clays (2018)
Journal Article
Eyo, E. U., Ng'ambi, S., & Abbey, S. J. (2019). Effect of intrinsic microscopic properties and suction on swell characteristics of compacted expansive clays. https://doi.org/10.1016/j.trgeo.2018.11.007

© 2018 Elsevier Ltd The complex swelling mechanism in expansive clays during moisture ingress can be succinctly explained by an examination of their core mineralogy, microfabric, grain size and suction response. This note has attempted to investigate... Read More about Effect of intrinsic microscopic properties and suction on swell characteristics of compacted expansive clays.

Structural performance of a modified shear-head assembly for edge steel column embedded in reinforced concrete slab (2018)
Journal Article
Ngekpe, B. E., Abbey, S. J., & Olubanwo, A. O. (2019). Structural performance of a modified shear-head assembly for edge steel column embedded in reinforced concrete slab. https://doi.org/10.5267/j.esm.2018.11.001

© 2018 by the authors; licensee Growing Science, Canada. This paper presents a study on the structural performance of a modified shear-head assembly for edge steel column embedded in reinforced concrete slab. The structural performance was investigat... Read More about Structural performance of a modified shear-head assembly for edge steel column embedded in reinforced concrete slab.

Strength and Hydraulic Conductivity of Cement and By -Product Cementitious Materials Improved Soil (2018)
Journal Article
Abbey, S. J., Ngambi, S., Olubanwo, A. O., & Tetteh, F. K. (2018). Strength and Hydraulic Conductivity of Cement and By -Product Cementitious Materials Improved Soil. International Journal of Applied Engineering Research, 13(10), 8684-8694

This paper presents an experimental investigation on strength and hydraulic conductivity of a fine grained soil mixed with cement, Pulverised Fly Ash and Ground Granulated Blast Slag. Strength and permeability are important properties that defines th... Read More about Strength and Hydraulic Conductivity of Cement and By -Product Cementitious Materials Improved Soil.

Non-Linear Analysis of Precast Concrete Segment Joints under High Compressive Loads (2018)
Journal Article
Boye, B. A., Abbey, S. J., Olubanwo, A. O., & Fonte, J. (2018). Non-Linear Analysis of Precast Concrete Segment Joints under High Compressive Loads. International Journal of Applied Engineering Research, 13(9), 6979-6988

When a precast concrete tunnel lining is loaded, the joints rotate as the lining deforms leading to varying contact lengths. This paper presents a numerical study on a precast concrete segment joint subjected to a high compressive loading, using nonl... Read More about Non-Linear Analysis of Precast Concrete Segment Joints under High Compressive Loads.

Investigative Study of Behaviour of Treated Expansive Soil Using Empirical Correlations (2018)
Journal Article
Ng'Ambi, S., Eyo, E., & Abbey, S. (2018). Investigative Study of Behaviour of Treated Expansive Soil Using Empirical Correlations. Geotechnical Special Publications, 2018-March(GSP 296), 373-384. https://doi.org/10.1061/9780784481592.037

© 2018 American Society of Civil Engineers (ASCE).All Rights Reserved. In this study, the effect of the soil mixing method on the swelling behaviour of expansive soils is investigated. Recent studies have demonstrated the modification effect of cemen... Read More about Investigative Study of Behaviour of Treated Expansive Soil Using Empirical Correlations.

Investigation of intrinsic de-bonding in bonded concrete overlays: Material characterisation and numerical study (2018)
Journal Article
Olubanwo, A. O., Karadelis, J. N., Saidani, M., Khorami, M., & Abbey, S. J. (2018). Investigation of intrinsic de-bonding in bonded concrete overlays: Material characterisation and numerical study. https://doi.org/10.5267/j.esm.2018.1.003

© 2018 Growing Science Ltd. All rights reserved. This study investigates the evolution of intrinsic interfacial de-bonding of Roller Compacted Steel Fibre Reinforced Polymer Modified Concrete (RC-SFR-PMC) bonded on substrate Ordinary Portland Cement... Read More about Investigation of intrinsic de-bonding in bonded concrete overlays: Material characterisation and numerical study.

Development of strength models for prediction of unconfined compressive strength of cement/byproduct material improved soils (2017)
Journal Article
Abbey, S. J., Ngambi, S., & Ganjian, E. (2017). Development of strength models for prediction of unconfined compressive strength of cement/byproduct material improved soils. Geotechnical Testing Journal, 40(6), 928-935. https://doi.org/10.1520/GTJ20160138

© 2017 ASTM International. All rights reserved. This paper presents the possible inclusion of pulverized fuel ash (PFA) and ground granulated blast slag (GGBS) in cement deep soil mixing for enhancement of unconfined compressive strength (UCS) of wea... Read More about Development of strength models for prediction of unconfined compressive strength of cement/byproduct material improved soils.

Investigative Modelling of Behaviour of Expansive Soils Improved using Soil Mixing Technique (2017)
Journal Article
Eyo, E. U., Ng'ambi, S., & Abbey, S. J. (2017). Investigative Modelling of Behaviour of Expansive Soils Improved using Soil Mixing Technique. International Journal of Applied Engineering Research, 12(13), 3828-3836

This paper presents an investigative modelling of the behaviour of expansive soils improved using the soil mixing technique. In this study, the effect of cement and the inclusion of cementitious by-product materials such as Pulverised Fuel Ash (PFA)... Read More about Investigative Modelling of Behaviour of Expansive Soils Improved using Soil Mixing Technique.

Mechanism of hydraulic fracturing in cohesive zone of embankment dam cores - A review (2017)
Journal Article
Poudel, S., Abbey, S. J., & Ngambi, S. (2017). Mechanism of hydraulic fracturing in cohesive zone of embankment dam cores - A review. International Journal of Civil Engineering and Technology, 8(7), 1202-1213

Estimation of critica fracturing in fill dam experimental studies fracturing, model tests, numerical simulations and field tests methodologies. Since hydraulic fracturing is m been given much consideration can be trusted and is fixed cohesive zone of... Read More about Mechanism of hydraulic fracturing in cohesive zone of embankment dam cores - A review.

Evaluation of equivalent delamination driving coefficient in bonded concrete overlays (2017)
Journal Article
Olubanwo, A. O., Karadelis, J., Abbey, S. J., & Olubanwo, A. O. (2017). Evaluation of equivalent delamination driving coefficient in bonded concrete overlays. International Journal of Civil Engineering and Technology, 8(5), 1436-1444

This study investigates failure due to interfacial delamination in a bonded concrete overlay system comprising Polymer Modifies Roller Compacted Concrete (PMRCC) overlay and substrate Ordinary Portland Concrete (OPC). Optimum overlay mix was designed... Read More about Evaluation of equivalent delamination driving coefficient in bonded concrete overlays.