A. O. Sojobi

A. O. Sojobi

City University of Hong Kong

H-index: 23

Asia-Hong Kong

About A. O. Sojobi

A. O. Sojobi, With an exceptional h-index of 23 and a recent h-index of 23 (since 2020), a distinguished researcher at City University of Hong Kong, specializes in the field of Optimization, Green concrete, Sustainable development, Pavement, Water quality and Public water supply.

His recent articles reflect a diverse array of research interests and contributions to the field:

Innovations, Disruptions and Future Trends in the Global Construction Industry

Modelling the relationship between circular economy barriers and drivers for sustainable construction industry

Seismic vulnerability and inventory of at-risk elements in the wine industry: Auckland region case study

Multi-objective optimization of high performance concrete columns under compressive loading with potential applications for sustainable earthquake-resilient structures and …

Multi-objective optimization of high performance bio-inspired prefabricated composites for sustainable and resilient construction

Demystifying the Barriers and Motivators for the Adoption of Base Isolation Systems in New Zealand

Development of nano-silica treatment methods to enhance recycled aggregate concrete

Effects of calcined clay, sawdust ash and chemical admixtures on Strength and Properties of concrete for pavement and flooring applications using Taguchi approach

A. O. Sojobi Information

University

City University of Hong Kong

Position

Architecture & Civil Engineering Department Hong Kong China

Citations(all)

1851

Citations(since 2020)

1721

Cited By

528

hIndex(all)

23

hIndex(since 2020)

23

i10Index(all)

29

i10Index(since 2020)

29

Email

University Profile Page

City University of Hong Kong

A. O. Sojobi Skills & Research Interests

Optimization

Green concrete

Sustainable development

Pavement

Water quality and Public water supply

Top articles of A. O. Sojobi

Innovations, Disruptions and Future Trends in the Global Construction Industry

Authors

Temitope Omotayo,Olabode Ogunmakinde,Temitope Egbelakin,Adebayo Sojobi

Published Date

2024/6/7

This book provides a wide range of expert views and case studies on the future of the construction industry from the perspectives of researchers and practition‑ers in various fields of study from business management, psychology, sociology, engineering, behavioural studies, and computer sciences. This book provides docu‑mentary evidence of how the construction industry has changed post‑COVID‑19 pandemic in terms of design, planning, management, construction, the behaviour of construction professionals, research in the built environment, and new interac‑tions of built environment practitioners with other professionals from computer science, finance, business management, and engineering. The evidence provided in this book can help decision makers in the construction sector and associated in‑dustries to understand human interaction in the construction sector and inspire new research directions …

Modelling the relationship between circular economy barriers and drivers for sustainable construction industry

Authors

Sulemana Fatoama Abdulai,Gabriel Nani,Ridwan Taiwo,Prince Antwi-Afari,Tarek Zayed,Adebayo Olatunbosun Sojobi

Journal

Building and Environment

Published Date

2024/4/15

Circular economy (CE) is an emerging concept in the construction industry that focuses on maintaining materials in a continuous cycle to maximize their value. Although previous studies have explored CE in different contexts, there is a lack of studies investigating the relationship between CE barriers and drivers in developing countries. To address this gap, this study aims to identify a list of barriers and drivers of CE adoption and investigate their relationship. The literature review classifies 21 barriers into four constructs, including market policy and technology-related, legal and institutional, supply chain-related, and product design and waste management barriers. Through a questionnaire-based survey with respondents mainly from the Ghanaian construction industry, the research uncovers the most critical barriers within each construct and identifies 13 out of 16 drivers to be critical for CE implementation. The …

Seismic vulnerability and inventory of at-risk elements in the wine industry: Auckland region case study

Authors

Olabode E Ogunmakinde,Temitope Egbelakin,Temitope Omotayo,Adebayo Sojobi

Journal

Structures

Published Date

2023/12/1

Seismic vulnerability is a major threat to New Zealand's winery industry. Many studies have assessed the vulnerability of New Zealand wineries, especially in high seismic regions. However, few studies have been conducted to assess the earthquake susceptibility of wineries in low seismic regions, such as Auckland. This study investigated the earthquake vulnerability of wineries in the Auckland region by (i) creating an inventory of the elements at risk in the wineries and (ii) assessing the level of vulnerability of these elements. As case studies, twenty-one wineries from various parts of the Auckland region were chosen. The research findings identified key elements at risk of seismic hazard in Auckland wineries using a field survey, including buildings, storage tanks, catwalks, and barrel racks. Furthermore, the findings revealed that at-risk elements are vulnerable to moderate to high levels, emphasising the need for …

Multi-objective optimization of high performance concrete columns under compressive loading with potential applications for sustainable earthquake-resilient structures and …

Authors

AO Sojobi,KM Liew

Journal

Composite Structures

Published Date

2023/7/1

High performance column composites are multifunctional composites designed to improve resilience of structures and infrastructures to natural and unforeseen multiple loads during service. As a result of their superior mechanical performance, high performance column composites have been found attractive to improve resilience of medium and high-rise buildings as well as long-span structures and infrastructures in earthquake-prone regions. Scientometric analysis revealed limitations of traditional design standards and inadequate earthquake engineering to reduce collosal damage during seismic impact and the need for investment in alternative green energy to reduce anthropogenic-induced earthquakes linked to oil and gas projects. High performance CFRP (carbon fibre reinforced polymer) composite was investigated as potential laminate reinforcement and confinement for recycled concrete column using …

Multi-objective optimization of high performance bio-inspired prefabricated composites for sustainable and resilient construction

Authors

AO Sojobi,KM Liew

Journal

Composite Structures

Published Date

2022/1/1

Modular prefabricated construction has attracted global attention to meet increasing housing demands and infrastructural deficits owing to its construction speed and efficiency. Unfortunately, the benefits of such modular prefabricated structures are undermined by heavy steel utilization, which is susceptible to corrosion, and contributes to their heavy weight leading to transportation and erection problems during construction. Bioinspired lightweight sandwich CFRP composite reinforcement is investigated as an alternative to steel along with recycled concrete for sustainable prefabricated construction using a performance-based hybrid Taguchi-Response surface methodology multi-objective optimization approach. The optimized result exhibited improved mechanical properties and favourable, ductile failure mode attributed to the Bauschinger strain-reversal effects and composite actions of the bio-inspired CFRP …

Demystifying the Barriers and Motivators for the Adoption of Base Isolation Systems in New Zealand

Authors

Temitope Egbelakin,Olabode Emmanuel Ogunmakinde,Temitope Omotayo,Adebayo Sojobi

Journal

Buildings

Published Date

2022/4/21

A base isolator is a proven system that can significantly reduce any damage to a building in the event of an earthquake. Despite their efficacy, seismic isolators are not widely used in New Zealand, with only about forty systems in use during the 2010 and 2011 Canterbury Earthquakes. This study seeks to investigate why base isolation systems are not frequently used in seismic strengthening projects and buildings in New Zealand. It also focuses on determining ways in which seismic isolators could become more widely used in New Zealand due to increased seismic activity. This study used an exploratory sequential mixed method design, in which qualitative data were collected first through in-depth face-to-face interviews, analysed, and used to construct the quantitative instrument, which was an online questionnaire. Data were obtained from construction professionals such as architects, engineers, site-based construction personnel, and quantity surveyors. The findings of this study indicated the need for an increased awareness of base isolation systems and improved universal guidelines for the design of seismic isolators. The motivators identified include provision of monetary incentives, such as reduced insurance premiums and financial subsidies, to encourage the adoption of seismic isolators. The factors preventing the adoption of base isolation systems in New Zealand were classified as human-related, safety and design-related, and cost-related. The study’s implication is that providing a universal guideline for seismic isolators can enhance designers’ confidence. Likewise, incentives may be provided to property owners to lower the cost of …

Development of nano-silica treatment methods to enhance recycled aggregate concrete

Authors

Long Li,Dongxing Xuan,Adebayo Olatunbsoun Sojobi,Songhui Liu,SH Chu,Chi Sun Poon

Journal

Cement and Concrete Composites

Published Date

2021/4/1

The reuse of recycled aggregates (RA) for producing recycled aggregate concrete (RAC) is a promising way to alleviate the environmental impacts and improve construction sustainability. Because of the inferior properties of RA than natural aggregate, pre-treatments of RA are commonly considered to improve the performance of RAC. In this study, three nano-silica (NS) treatment methods, i.e., pre-spraying plus air-drying, pre-spraying without air-drying and pre-soaking plus air-drying, were adopted and evaluated systematically by varying the dosage and the particle size of NS suspension. The mechanical properties and durability of RAC such as compressive strength, elastic modulus, rate of water absorption and chloride penetration resistance were evaluated. For the microstructural assessment, the micro-hardness test was conducted to investigate the influence of these NS treatment methods on the old mortar …

Effects of calcined clay, sawdust ash and chemical admixtures on Strength and Properties of concrete for pavement and flooring applications using Taguchi approach

Authors

Temitope Funmilayo Awolusi,Adebayo Olatunbosun Sojobi,Daniel Oluwafemi Oguntayo,Olufunke O Akinkurolere,BO Orogbade

Journal

Case Studies in Construction Materials

Published Date

2021/12/1

Strength, abrasion and skid resistance are crucial factors for assessing the performance of pavement concrete and concrete for flooring applications. Due to sustainability concerns and global climate change, various supplementary (pozzolanic) cementitious materials (SCMs) are increasingly promoted for use as cement replacement in pavement concrete without considering their effects on the strength, abrasion and skid resistance. In addition, chemical admixtures are often added to improve workability of pavement concrete. Therefore, this study investigates the effects of calcined clay and sawdust ash utilized as cement replacements and two kinds of chemical admixtures on thestrength, abrasion and skid resistance of concrete for pavement and flooring applications. Calcined clay is preferable to sawdust ash as partial cement replacement in pavement concrete as it gives higher flexural strength, skid …

A comparison of liquid-solid and gas-solid accelerated carbonation for enhancement of recycled concrete aggregate

Authors

Songhui Liu,Peiliang Shen,Dongxing Xuan,Long Li,Adebayo Sojobi,Baojian Zhan,Chi Sun Poon

Journal

Cement and Concrete Composites

Published Date

2021/4/1

To enhance the properties of recycled concrete aggregates (RCA), a liquid-solid carbonation process was developed and compared with the conventional gas-solid pressurized carbonation method. The performance of RCA and the recycled aggregate concrete (RAC) prepared with the carbonated RCA by the two aforementioned carbonation methods was evaluated. The carbonation products assemblage, microstructure and porosity evolution were first characterized. The results indicated that after subjecting to a 10-min liquid-solid carbonation process, a reduction of 12.2% in RCA water absorption and an increase of 2.6% in density were achieved, which were more efficient when compared to the 24-h gas-solid pressurized carbonation. More importantly, the compressive strength of RAC prepared with the 6-h liquid-solid carbonated RCA was significantly improved. In light of microstructural analysis, the enhanced …

Efficiencies of carbonation and nano silica treatment methods in enhancing the performance of recycled aggregate concrete

Authors

Long Li,Dongxing Xuan,AO Sojobi,Songhui Liu,Chi Sun Poon

Journal

Construction and Building Materials

Published Date

2021/11/15

This study compared the efficiencies of five recycled aggregate treatment methods (pressurized gas–solid carbonation (PC), flow-through gas–solid carbonation (FC), wet carbonation (WC), nano-silica (NS) spraying and combined PC with NS spraying (PCNS)) in enhancing the performance of recycled aggregate concrete (RAC). Mechanical properties, durability and microhardness of RACs were evaluated. The results showed that PC method recorded higher enhancing efficiency than both FC and WC method. NS spraying method caused higher improvement in mechanical properties of RAC than three carbonation methods. Because of the synergistic effect of enhanced old mortar and new ITZ, PCNS method recorded the highest efficiency.

Flexural behaviour and efficiency of CFRP-laminate reinforced recycled concrete beams: Optimization using linear weighted sum method

Authors

Adebayo Olatunbosun Sojobi,Kim Meow Liew

Journal

Composite Structures

Published Date

2021/3/15

The increased demand for lightweight high-performance composites has led to search for alternative reinforcement to improve the mechanical performance of conventional structures. Likewise, various research initiatives have advocated recycling of construction and demolition wastes and novel technologies to avert their generation. Owing to disadvantages of steel rebar, carbon fibre reinforced polymer (CFRP) was utilized as potential internal reinforcement in recycled concrete beam owing to its lightweight, non-corrosiveness, high-stiffness-to-weight ratio and flexibility. Our study revealed significant improvement in the mechanical performance and efficiency which is controlled by the fibre architecture. The improved mechanical properties was attributed to the Bauschinger strain-reversal effect, made possible by the effective CFRP tensile strength mobilization, its high bonded surface area and interfacial energy as …

Optimization of gas-solid carbonation conditions of recycled aggregates using a linear weighted sum method

Authors

Adebayo Olatunbsoun Sojobi,Dongxing Xuan,Long Li,Songhui Liu,Chi Sun Poon

Journal

Developments in the Built Environment

Published Date

2021/7/1

Optimization of pretreatment and various gas-solid interaction conditions is necessary for effective carbonation of recycled coarse aggregates derived from concrete wastes (RCA). This study demonstrated the use of linear weighted sum method to simultaneously optimize the pretreatment and carbonation test conditions. The optimization of the test conditions produced simplified, and eco-friendly pretreatments and drastically reduced the carbonation duration of RCA from 72 h to 3 weeks in previous studies to 18 h in this study. In addition, the optimum experimental conditions were validated by casting concrete using the carbonated RCAs. The optimized pretreatment and carbonation conditions were spraying Ca2+-rich wastewater at a level of 60% of the 24 h water absorption of RCA, 12 h air drying and 6 h carbonation at 60 °C. This study also demonstrated that wastewater derived from ready-mix concrete …

Waste tires steel fiber in concrete: A review

Authors

Temitope F Awolusi,Oluwaseyi L Oke,Olumoyewa D Atoyebi,Olufunke O Akinkurolere,Adebayo O Sojobi

Published Date

2021/3

The emergence of waste tire steel fiber (WTSF) which is an undervalued resource was borne out of the need to extract the useful materials in waste tires considering the sheer volume of this resource that is disposed of in landfills globally. These fibers find applications in tunnel linings, hydraulic structures, bridge decks, pavements and slope stabilization. The fiber length has positive influence on compressive strength (increased by more than 10%), flexural strength (increased by more than 50%) and split-tensile strength(increased by more than 30%) while slump and flow (increased by more than 80%) were reduced but can be avoided through careful mixing, reduction of coarse aggregates and utilization of short fibers. Utilization of WTSF contributes to the sustainability of the construction industry. This paper focuses on reviewing the contemporary management of waste tires, fresh and hardened properties …

Impact of sewer overflow on public health: A comprehensive scientometric analysis and systematic review

Authors

AO Sojobi,T Zayed

Journal

Environmental Research

Published Date

2021/6/30

Sewer overflow (SO), which has attracted global attention, poses serious threat to public health and ecosystem. SO impacts public health via consumption of contaminated drinking water, aerosolization of pathogens, food-chain transmission, and direct contact with fecally-polluted rivers and beach sediments during recreation. However, no study has attempted to map the linkage between SO and public health including Covid-19 using scientometric analysis and systematic review of literature. Results showed that only few countries were actively involved in SO research in relation to public health. Furthermore, there are renewed calls to scale up environmental surveillance to safeguard public health. To safeguard public health, it is important for public health authorities to optimize water and wastewater treatment plants and improve building ventilation and plumbing systems to minimize pathogen transmission within …

Ternary and quaternary blends as partial replacement of cement to produce hollow sandcrete blocks

Authors

AO Sojobi,TF Awolusi,GB Aina,OL Oke,M Oladokun,DO Oguntayo

Journal

Heliyon

Published Date

2021/6/1

Hollow sandcrete blocks constitute more than 90% of residential building construction in developing countries especially in West Africa. Over-reliance on dredged river sands and conventional ordinary Portland cement (OPC) contributes to environmental degradation and post-construction problems such as swelling and shrinkage-induced cracks prevalent in construction projects. The study investigates potential utilization of locally available materials such as laterite, calcite and calcined clay as ternary and quaternary blends to replace cement and quarry dust as 100% replacement of river sand with the aid of Taguchi-Response surface methodology approach. Optimum ternary blend of 24% calcined clay +1% calcite +75% OPC is recommended to achieve volume stability, higher compressive strength and higher flexural load capacity. Alternatively, ternary blends of 24% calcite +4% calcined clay +72% OPC can …

See List of Professors in A. O. Sojobi University(City University of Hong Kong)

A. O. Sojobi FAQs

What is A. O. Sojobi's h-index at City University of Hong Kong?

The h-index of A. O. Sojobi has been 23 since 2020 and 23 in total.

What are A. O. Sojobi's top articles?

The articles with the titles of

Innovations, Disruptions and Future Trends in the Global Construction Industry

Modelling the relationship between circular economy barriers and drivers for sustainable construction industry

Seismic vulnerability and inventory of at-risk elements in the wine industry: Auckland region case study

Multi-objective optimization of high performance concrete columns under compressive loading with potential applications for sustainable earthquake-resilient structures and …

Multi-objective optimization of high performance bio-inspired prefabricated composites for sustainable and resilient construction

Demystifying the Barriers and Motivators for the Adoption of Base Isolation Systems in New Zealand

Development of nano-silica treatment methods to enhance recycled aggregate concrete

Effects of calcined clay, sawdust ash and chemical admixtures on Strength and Properties of concrete for pavement and flooring applications using Taguchi approach

...

are the top articles of A. O. Sojobi at City University of Hong Kong.

What are A. O. Sojobi's research interests?

The research interests of A. O. Sojobi are: Optimization, Green concrete, Sustainable development, Pavement, Water quality and Public water supply

What is A. O. Sojobi's total number of citations?

A. O. Sojobi has 1,851 citations in total.

What are the co-authors of A. O. Sojobi?

The co-authors of A. O. Sojobi are KM Liew (Kim Meow LIEW), L.W. Zhang (Lu-Wen Zhang), ENGR DR T.F. AWOLUSI.

Co-Authors

H-index: 117
KM Liew (Kim Meow LIEW)

KM Liew (Kim Meow LIEW)

City University of Hong Kong

H-index: 58
L.W. Zhang (Lu-Wen Zhang)

L.W. Zhang (Lu-Wen Zhang)

Shanghai Jiao Tong University

H-index: 10
ENGR DR T.F.  AWOLUSI

ENGR DR T.F. AWOLUSI

Landmark University

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