Skip to main content

Research Repository

Advanced Search

Enhancing the engineering properties of subgrade materials using processed waste: A review (2021)
Journal Article
Amakye, S. Y., Abbey, S. J., Booth, C. A., & Mahamadu, A. (2021). Enhancing the engineering properties of subgrade materials using processed waste: A review. Geotechnics, 1(2), 307-329. https://doi.org/10.3390/geotechnics1020015

Subgrade materials refer to the original ground underneath a road pavement, when these materials are made up of expansive soil it is referred to as expansive subgrade. Sometimes, these materials do not have sufficient capacity to support the weight o... Read More about Enhancing the engineering properties of subgrade materials using processed waste: A review.

Improved prediction of clay soil expansion using machine learning algorithms and meta-heuristic dichotomous ensemble classifiers (2021)
Journal Article
Eyo, E. U., Abbey, S. J., Lawrence, T. T., & Tetteh, F. K. (2022). Improved prediction of clay soil expansion using machine learning algorithms and meta-heuristic dichotomous ensemble classifiers. Geoscience Frontiers, 13(1), https://doi.org/10.1016/j.gsf.2021.101296

Soil swelling-related disaster is considered as one of the most devastating geo-hazards in modern history. Hence, proper determination of a soil's ability to expand is very vital for achieving a secure and safe ground for infrastructures. Accordingly... Read More about Improved prediction of clay soil expansion using machine learning algorithms and meta-heuristic dichotomous ensemble classifiers.

Multiclass stand-alone and ensemble machine learning algorithms utilised to classify 1 soils based on their physicochemical characteristics (2021)
Journal Article
Abbey, S., & Eyo, E. (in press). Multiclass stand-alone and ensemble machine learning algorithms utilised to classify 1 soils based on their physicochemical characteristics. Journal of Rock Mechanics and Geotechnical Engineering, 14(2),

10 This study has provided an approach to soil classification by using the concept of machine 11 learning (ML). Multiclass elements of stand-alone ML algorithms (Logistic regression (LR) 12 and artificial neural networks (ANN)), decision tree ensembl... Read More about Multiclass stand-alone and ensemble machine learning algorithms utilised to classify 1 soils based on their physicochemical characteristics.

Results of application of artificial neural networks in predicting geo-mechanical properties of stabilised clays - A Review (2021)
Journal Article
Abbey, S. (2021). Results of application of artificial neural networks in predicting geo-mechanical properties of stabilised clays - A Review. Geotechnics, 1(1), 147-171

This study presents a literature review on the use of artificial neural networks in the prediction of geo-mechanical properties of stabilised clays. In this paper, the application of ANN in ge-otechnical analysis of clay stabilised with cement, lime,... Read More about Results of application of artificial neural networks in predicting geo-mechanical properties of stabilised clays - A Review.

Understanding the performance of expansive subgrade materials treated with non-traditional stabilisers: A review (2021)
Journal Article
Amakye, S. Y., & Abbey, S. J. (2021). Understanding the performance of expansive subgrade materials treated with non-traditional stabilisers: A review. Cleaner Engineering and Technology, 4,

13 Expansive soils are problematic soils which pose a risk to the safety of civil engineering 14 structures. These soils can be treated by compaction or by adding additives to the soil. 15 Where the strength and properties of expansive soil cannot be... Read More about Understanding the performance of expansive subgrade materials treated with non-traditional stabilisers: A review.

Inclusion of RoadCem additive in cementitious materials for soil stabilization (2021)
Journal Article
Eyo, E. U., Ng’ambi, S., & Abbey, S. J. (2021). Inclusion of RoadCem additive in cementitious materials for soil stabilization. Geotechnical Special Publications, 2021-May(GSP 324), 166-176. https://doi.org/10.1061/9780784483411.016

The use of sustainable binders in soil stabilization has dominated most discussions in geotechnical engineering in recent years. In keeping with the objective of reducing carbon foot-printing, a zeolite/alkali earth metal-based additive called “RoadC... Read More about Inclusion of RoadCem additive in cementitious materials for soil stabilization.

Machine learning regression and classification algorithms utilised for strength prediction of OPC/by-product materials improved soils (2021)
Journal Article
Eyo, E. U., & Abbey, S. J. (2021). Machine learning regression and classification algorithms utilised for strength prediction of OPC/by-product materials improved soils. Construction and Building Materials, 284, https://doi.org/10.1016/j.conbuildmat.2021.122817

In this study, stand-alone machine (ML) models (Bayesian regressor (BLR), least square linear regressor (REG), artificial neural networks (ANN), and logistic regression (LR)), tree-ensemble ML models (boosted decision tree (BDT), random decision fore... Read More about Machine learning regression and classification algorithms utilised for strength prediction of OPC/by-product materials improved soils.

Consistency and mechanical properties of sustainable concrete blended with brick dust waste cementitious materials (2021)
Journal Article
Amakye, S. Y., Abbey, S. J., & Olubanwo, A. O. (2021). Consistency and mechanical properties of sustainable concrete blended with brick dust waste cementitious materials. SN Applied Sciences, 3, https://doi.org/10.1007/s42452-021-04430-w

The reuse of waste materials in civil engineering projects has become the topic for many researchers due to their economic and environmental benefits. In this study, brick dust waste (BDW) derived from cutting of masonry bricks and demolition waste w... Read More about Consistency and mechanical properties of sustainable concrete blended with brick dust waste cementitious materials.

Experimental study on the use of RoadCem blended with by-product cementitious materials for stabilisation of clay soils (2021)
Journal Article
Ngambi, S., Okeke, C. A., Eyo, E. U., & Abbey, S. (2021). Experimental study on the use of RoadCem blended with by-product cementitious materials for stabilisation of clay soils. Construction and Building Materials, 280, https://doi.org/10.1016/j.conbuildmat.2021.122476

This work presents an experimental study on the physical, mechanical and microstructural characteristics of two clay soils treated with by-product materials (GGBS and PFA) blended with a nano technology-based additive called RC (RC). The soils were i... Read More about Experimental study on the use of RoadCem blended with by-product cementitious materials for stabilisation of clay soils.

Microstructure and physical-mechanical characteristics of treated kaolin-bentonite mixture for application in compacted liner systems (2021)
Journal Article
Eyo, E., Abbey, S., Oti, J., Ng’ambi, S., Ganjian, E., & Coakley, E. (2021). Microstructure and physical-mechanical characteristics of treated kaolin-bentonite mixture for application in compacted liner systems. Sustainability, 13(4), https://doi.org/10.3390/su13041617

Treated bentonite-rich soils used as liner materials in landfills may provide an effective solution to the problems of increased void ratios upon swelling at reduced suction as well as desiccation cracking when suction is increased during desaturatio... Read More about Microstructure and physical-mechanical characteristics of treated kaolin-bentonite mixture for application in compacted liner systems.

Appropriate use of lime in the study of the physicochemical behaviour of stabilised lateritic soil under continuous water ingress (2020)
Journal Article
Okeke, C., Abbey, S., Oti, J., Eyo, E., Johnson, A., Ngambi, S., …Ujile, M. (2021). Appropriate use of lime in the study of the physicochemical behaviour of stabilised lateritic soil under continuous water ingress. Sustainability, 13(1), 1-26. https://doi.org/10.3390/su13010257

Licensee MDPI, Basel, Switzerland. Lime stabilisation is one of the traditional methods of improving the engineering properties of lateritic soils for use as subgrade and foundation materials for the construction of road pavements and highway embankm... Read More about Appropriate use of lime in the study of the physicochemical behaviour of stabilised lateritic soil under continuous water ingress.

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. (2021). 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, 24(2), 436-448. 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).