Oluwole OLAWUYI | Ladoke Akintola University of Technology (original) (raw)

Papers by Oluwole OLAWUYI

Lecture notes in networks and systems, 2024

International Journal of Engineering Research in Africa, Mar 15, 2022

This study investigates the effects of waste glass as a replacement for fine and coarse aggregate... more This study investigates the effects of waste glass as a replacement for fine and coarse aggregates on the strength properties of concrete. Fine waste glass (FWG) and coarse waste glass (CWG) were utilised to replace natural fine and coarse aggregates at replacement rates of 0%, 10%, 15%, and 20%, with a constant water-to-binder (w/b) ratio of 0.5 and a mix ratio of 1:1½:3 for M25 grade. The workability of fresh concrete mix was determined with the slump test. To assess the hardened characteristics of concrete, compressive and tensile strength tests were performed at 7, 14, and 28 days’ curing ages. The results show that the workability of concrete decreases as the FWG and CWG contents in the concrete mix increase. The 28-day compressive and tensile strengths of concrete increased by 28% and 16% respectively, with the replacement of up to 15% FWG and CWG, respectively compared to the control. However, the compressive and tensile strengths of concrete reduces with further replacement of fine and coarse aggregate with waste glass. The strength properties of concrete are improved at the optimum permissible level of 15% FWG and CWG, respectively, as a substitute for conventional fine and coarse aggregates. It was concluded that using waste glass as a constituent material in concrete production is a viable option for disposing of waste glass and lowering concrete production costs.

IOP conference series, Apr 1, 2021

Population, ownership of vehicles and economic growth are increasing at a geometric rate. Invaria... more Population, ownership of vehicles and economic growth are increasing at a geometric rate. Invariably, this will lead to an increase in traffic volume and the demand for limited road infrastructures. These has generated a lot of constraint on the few available road infrastructures in most developed and developing nations of the world. One of the consequences of this, is traffic congestion. This arises when the road system approaches vehicle capacity. Although governments and policy makers may never be able to eliminate road congestion, there are several ways cities and states can move to curb it. Hence, this review of literature assessed the myriad effect of traffic congestion, with focus on the economic and environmental impact. Additionally, long and short term measures to reduce the menace in 2030 were evaluated. This was done by assessing the relevant literature on the topic. The outcome of the review revealed that increase in income and living standard favours the ownership of automobiles thereby increasing traffic congestion. Households that reside in areas with compact, mixed land use own fewer vehicles, make fewer vehicle trips, therefore mixed land use should be encouraged in urban development. Additionally, level of Service (LOS) is another factor that affects traffic congestion and traffic crashes. The outcome of this review will aid the government and policy makers on the appropriate tool to adopt and the draw backs in a bid to reduce this menace now and in the foreseeable future.

Water cycle, 2022

Groundwater is an important water source for agricultural irrigation in Penyang County. Some trad... more Groundwater is an important water source for agricultural irrigation in Penyang County. Some traditional methods such as irrigation coefficient, sodium adsorption ratio, total alkalinity, total salinity and total dissolved solids were employed to assess groundwater quality in this area. In addition, an improved technique for order preference by similarity to ideal solution model was applied for comprehensive assessment. The origin of major ions and groundwater hydrogeochemical evolution was also discussed. Groundwater in Penyang County contains relative concentrations of dominant constituents in the following order: Na ? [ Ca 2? [ Mg 2? [ K ? for cations and HCO 3-[ SO 4 2-[ Cl-[ CO 3 2for anions. Groundwater quality is largely excellent and/or good, suggesting general suitability for agricultural use. Calcite and dolomite are found saturated in groundwater and thus tend to precipitate out, while halite, fluorite and gypsum are unsaturated and will dissolve into groundwater during flow. Groundwater in the study area is weathering-dominated, and mineral weathering (carbonate and silicate minerals) and ion exchange are the most important factors controlling groundwater chemistry.

International journal of pavement research and technology, Aug 16, 2021

Global astronomical rise in the urban population has led to increase in the quantity of waste mat... more Global astronomical rise in the urban population has led to increase in the quantity of waste materials generated in all facets of human endeavour. Indiscriminate disposal of waste materials is fast becoming a serious problem in Nigeria as construction activities remain the primary source for the generation of huge amount of waste materials. Nonetheless, efforts to achieve the sustainability of the environment have led to the investigation of a number of sustainable materials (solid waste materials) as suitable materials for the improvement of lateritic soil, as against the conventional methods of using cement and lime for soil modification. This paper reviewed the effects of rice husk ash, bagasse ash, palm bunch ash and periwinkle shell ash on lateritic soil for road pavement construction. Documented evidences have shown that rice husk ash, bagasse ash and palm bunch ash, which are all processed agricultural waste materials show great pozzolanic potentials, whereas, periwinkle shell ash has good stabilizing characteristics for the improvement of soil for road pavement construction. A review of the comparative evaluation of the chemical composition and the engineering properties of the materials together with those of cement showed that periwinkle shell ash possessed appreciable amount of calcium oxide (CaO) which supports cohesiveness of the pavement materials and shows perfect potentials for improving the soil while the other materials would require some amounts of cement to effectively bind the soil particles to attain improved matrix with lateritic soil. Arising from this overview, the gap in the related literature was leveraged on to give a direction for the potential use of agricultural waste materials for road pavement construction with consideration of their composition, economic and environmental usefulness and likely future developments.

Arid Zone Journal of Engineering, Technology and Environment, 2019

The development of a nation partially depends on sustainable materials obtained from agricultural... more The development of a nation partially depends on sustainable materials obtained from agricultural products. Increased agricultural products could increase the amount of waste generated yearly. This paper presents a review on the use of agricultural waste with pozzolanic properties (rice husk ash, Locust bean waste ash, Palm oil fuel ash, Banana leaf ash, Bagasse ash, Coconut shell ash, Bamboo leaf ash, Corn cob ash, Cassava peel ash and Palm kernel shell ash) in various geotechnical engineering applications. Interestingly, these wastes were subjected to various laboratory tests such as (particle size distribution, Compaction, Atterberg, unconfined compressive strength (UCS) and California bearing ratio (CBR)) to assess their effectiveness in soil improvement. In all these, the percentages of the materials required for soil improvement were discussed. The reports from various researchers have shown that agricultural waste having pozzolanic properties improves the engineering properti...

Soil stabilisation is a major technique in enhancing the engineering properties of Lateritic soil... more Soil stabilisation is a major technique in enhancing the engineering properties of Lateritic soil. There is need to investigate the effect of scenarios when there is elapsed time between when the soil-cement is mixed and when it is spread and compacted. Therefore, this study focussed on the influence of this compaction delay on the engineering properties of cement-stabilised lateritic soil. The lateritic soil was stabilised with 1.5, 3.0, 4.5 and 6.0% cement by weight of soil. The mixture of the soil-cement was left for elapsed time of 1, 3, and 5 h. The natural, stabilised and the stabilised soils with compaction delay were subjected to Sieve analysis, LL, PL. BSL, WAS and AASHTO compaction, UCS and CBR tests. The natural soil was suitable for highway construction except for base course. The MDD of the stabilised soil decrease while the MDD, UCS and CBR increase with increase in cement content. The optimal cement content for the A-2-4(0) soil is 4.5% and the effect of the compactio...

Journal of Poverty, Investment and Development, 2015

Nigeria being a developing economy still has a high percentage of low income earners. Mobility an... more Nigeria being a developing economy still has a high percentage of low income earners. Mobility and modal choice affect us all in our daily life whether we are commuting to work or for recreational purpose. Catering for the effective and efficient mobility of this unique set of low income earners is a task for transport planners. This research assessed the mobility of the poor using land use and level of income. The study area was divided into six zones based on the land use configuration.Income level, frequency of trip and the predominant modal choice for both work and business trip were evaluated. The result showed that the use of taxi and motor cycle in the study area is high. The low income group has the highest frequency of trip base on the level of income and land use. The result of this research will aid the government at all levels and policy makers in formulating a good transportation scheme for the low income earners now and in the foreseeable future. It will also provide p...

Journal of Engineering Research

Journal of the Geological Society of India, 2012

ABSTRACT The Markanda river basin occupying an area of about 1547 km2 is a part of the alluvial d... more ABSTRACT The Markanda river basin occupying an area of about 1547 km2 is a part of the alluvial deposits of the Indo- Gangetic plain near the Himalayan foothills in the northwest India. The region is associated with active agricultural activities and makes significant contribution to the country’s agricultural products. Assessment of groundwater quality for irrigation use and hydrochemical evolution of groundwater has been studied. Hydrochemical analysis has been carried out based on concentrations of Ca2+, Mg2+, Na+, K+, Cl−, SO42−, CO32− and HCO3−. Sodium adsorption ratio (SAR), percent sodium (%Na), permeability index (PI) and Trilinear diagram have been studied to evaluate suitability of irrigation use. Hydrochemical evolution has been analyzed based on the Chebotarev sequence and expanded Durov diagram. SAR, %Na and PI results indicate that the groundwater in the basin is suitable for irrigation use. Analysis on Trilinear diagram reveals that hydrochemical facies are dominated by HCO3−- Ca2+- Mg2+ facies indicating that the groundwater is associated with recharge waters percolating through sandstone and limestone rocks which are exposed in the northern part of the basin. Studies based on Chebotarev anion sequence and expanded Durov diagram indicate that the evolution of groundwater belongs to initial to intermediate stage indicating fresh water quality. Thus, the present work reveals that groundwater in the Markanda basin is of good quality and is suitable for all uses including interbasin water transfer in the region.

Journal of Engineering Studies and Research

Waste Steel Fibre (WSF) and Rice Husk Ash (RHA) were used in the production of Self Compacting Co... more Waste Steel Fibre (WSF) and Rice Husk Ash (RHA) were used in the production of Self Compacting Concrete (SCC). Seven variants of SCC mixes were prepared. The rheological and mechanical properties (Compressive Strength (CS) and Split Tensile Strength (STS)) of the SCC produced were examined. The results showed that the blocking ratio varied marginally while other fresh properties of the SCC with WSF compared favourably to the standard. The CS of the hardened control samples after 56 days of curing was 36.18 N/mm2 while the CS of SCC with 15 % of RHA and 0.0 %-0.5 % of WSF, ranged from 37.04 - 43.64 N/mm2 with the maximum CS at 0.4 % WSF addition. Similarly, the STS of SCC at 56 days improved with an increase in WSF content up to 0.4 % and decreased with further addition of WSF. The inclusion of WSF at the optimum level of 0.4 % addition had a better influence on the tensile strength of SCC thereby increasing the ratio of STS to CS.

Results in Engineering, 2022

Tanzania Journal of Science, 2021

The use of industrial by-products in concrete production is part of concerted efforts on the redu... more The use of industrial by-products in concrete production is part of concerted efforts on the reduction of environmental hazards attributed to the mining of conventional aggregates. Consideration of iron filings (IF), a by-product from steel production process, is an environmentally friendly way of its disposal which is expected to yield economic concrete production. Six self-compacting concrete (SCC) mixes were made by partially substituting river sand with IF at 5%, 10%, 15%, and 20% and the mix without IF (0% IF) served as the control. The water-binder (w/b) ratio of 0.45 was adopted for all mixes. The fresh state properties of SCC evaluated include: filling ability determined using slump flow and T500 mm slump flow tests, passing ability determined using L-box test and segregation resistance determined using V-funnel tests. The strength properties of SCC considered were compressive and tensile strengths. All the SCC mixes met the fresh properties requirements for filling capacity...

Environmental Challenges, 2021

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

International Journal of Engineering Research in Africa, 2022

The trip pattern of the university community is a vital component of the overall transportation d... more The trip pattern of the university community is a vital component of the overall transportation demand of a province, but it is not well epitomized in travel demand models. This descriptive research assessed the temporal commuting pattern in the university environment, with special focus on universities in southwestern Nigeria. This study was achieved by using detailed questionnaires and oral interviews for data collection from both staff and students in the universities considered. Information on socioeconomics, demographics, the frequency of trips, trip time, and transportation mode choice were analyzed. We adopted statistical software SPSS version 21 and Microsoft Excel for the data analysis. The results of our research showed that the use of the shuttle as a transportation mode declined as the trip time increased, among university staff, with an R2 of 0.9308. Conversely, bicycle use increased irrespective of the trip time for both student and staff, with a R2 value of 0.928. Uni...