Papers by Engr. solomon oyebisi
Application of artificial intelligence in the hazard indexes of recycled agricultural waste materials
Multiscale and Multidisciplinary Modeling, Experiments and Design, Dec 24, 2023
Experimental and deep neural network approaches on strength evaluation of ternary blended concrete
Construction & building materials, Aug 1, 2024
An Investigation on the Use of Expanded Polystyrene as a Partial Replacement of Fine Aggregate in Concrete
The Journal of Engineering Research, Sep 30, 2020
Nonlinear finite element and analytical modelling of reinforced concrete filled steel tube columns under axial compression loading
Results in engineering, Aug 1, 2023
Journal of Engineering and Applied Science, Jul 18, 2023
The research was carried out to assess the concentration and distribution of heavy metals in grou... more The research was carried out to assess the concentration and distribution of heavy metals in groundwater from selected automobile workshops in Ozoro metropolis, a busy university town, in the Niger Delta region of Nigeria. The major activities carried out in the sampled automobile workshops include vehicle maintenance, painting, panel beating and fabrication. Nine (9) groundwater samples from the automobile workshops and one control sample 2 km away from the influence area were analyzed. Heavy metal concentration, contamination factor, and pollution loading indices were investigated using geostatistical modeling and statistical analysis tools. Heavy metal concentrations in the various samples were determined in accordance with the Association of Official Agricultural Chemists (AOAC) International guidelines. Findings obtained from the study revealed that the groundwater was affected by leachates from the automobile workshops, as the heavy metal levels in the groundwater from the sampling sites were considerably higher than the reference point. The concentration ranges (mg/L) of the heavy metals were Cd (0.0217-0.0412), Cr (0.0643-0.0901), Cu (0.0599-0.0803), Fe (0.3118-0.4171), and Pb (0.1423-0.1781). The spatial distribution maps showed that the metals spread unevenly across the study area. The pollution indices revealed that groundwater from the sampling sites is moderately polluted with heavy metals and the trend of the pollution load index (PLI) is Cd > Ni > Cu > Mn > Pb > Zn > Fe. Comparing the results with those of international regulatory bodies, the groundwater from the study area was found to still be within the approved range for potable water. However, there is evidence of slight contamination due to the activities of the automobile workshops. This may call for minor treatment before usage, regular monitoring and ensuring that the artisans comply with relevant regulations in their operations.
Application of machine learning algorithm in the internal and external hazards from industrial byproducts
Cleaner engineering and technology, Apr 1, 2023
Application of machine learning algorithm in the internal and external hazards from industrial byproducts
Cleaner Engineering and Technology
Strength Prediction of GPC using Alkali pH, Salinity, Temperature, and Conductivity as Continuous Predictors
IOP Conference Series: Materials Science and Engineering, 2021
This study explored the chemistry of alkaline activators, and their physical properties were used... more This study explored the chemistry of alkaline activators, and their physical properties were used to predict the compressive strength of geopolymer concrete (GPC). Sodium silicate (Na2SiO3) gel and six various pellets of sodium hydroxide (NaOH) were used as the alkaline activators. Ground granulated blast furnace slag (GGBFS) and corncob ash (CCA) were utilized as supplementary cementitious materials (SCMs) in the production of GPC. A mix design proportion of Grade 30 MPa concrete and 14 M of alkaline activator (AA) was adopted. The concrete constituents were prepared, cured, and tested at 7, 28, 56, and 90 days. The relationship between the compressive strengths and the pH, temperature, salinity, and conductivity of alkaline activator was modelled. The experimental findings indicated that the temperature, conductivity and salinity of the alkali increased with increasing pH. Besides, the compressive strength of GPC increased with increasing alkali’s pH, temperature, conductivity, an...
Mechanical and durability assessments of steel slag-seashell powder-based geopolymer concrete
Heliyon
Scientia Iranica, Apr 21, 2021
This study investigated the flexural strength of geopolymer concrete (GPC) beams produced with gr... more This study investigated the flexural strength of geopolymer concrete (GPC) beams produced with ground granulated blast furnace slag (GGBFS) and corn cob ash (CCA). The design of experiment (DOE), Box-Behnken design (BBD) of the response surface methodology (RSM), was used to optimize the strength. GGBFS was replaced at 0, 20, and 40 wt. % of CCA. The mixes were activated with 14 molar concentration (14 M) of both sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) solutions. The mix design properties such as alkaline liquid to binder ratio, binder to aggregate ratio, binder ratio, and curing time were statistically applied as continuous (independent) variables to optimize the response factor (flexural strength). Compared with the control sample (Portland cement concrete), GPC exhibited higher compressive and flexural strengths at up to 40 wt. % of CCA replacement. The models predicted the response of flexural strength with less than 5% variability. Besides, the correlation between the experimental and the optimized flexural strength yielded a high precision with 99.6% "R 2 ". Therefore, this study's response models would be advantageous in the optimization of mix design proportions for obtaining target flexural strength of GPC beams produced with GGBFS and CCA.
Correlating the thermomechanical indexes of concrete modified with anacardium occidentale nutshell ash using linear model polynomial analysis
IOP conference series, Mar 1, 2021
This study correlated the thermal and mechanical properties of concrete produced with anacardium ... more This study correlated the thermal and mechanical properties of concrete produced with anacardium occidentale (cashew) nutshell ash (AONA). Cashew nutshells, agricultural waste products, was valorized to obtain AONA. AONA was replaced at 5, 10, 15, and 20 wt% of cement to produce concrete grade 25 MPa. Density, compressive strength, and thermal conductivity of the concrete samples were determined at 28 days curing, and the results were correlated using regression model analysis. The experimental findings revealed that the compressive strength increased with increasing AONA content. Moreover, both density and thermal conductivity reduced as AONA content increased. Besides, the correlation yielded a high precision with 97% “R2”. Thus, AONA has proved to exhibit higher mechanical strength with excellent thermal insulation when utilized as supplementary cementitious material (SCM) in concrete production. The developed model can also be applied to the correlation of thermomechanical properties of concrete incorporating SCMs in that time, energy, and cost in conducting laboratory works would be reduced.
A review on the impact of information and communication technology in civil engineering practice
IOP conference series, Mar 1, 2021
Information and Communication Technology is playing a vital role in virtually almost every field ... more Information and Communication Technology is playing a vital role in virtually almost every field of human operation such as education sector, medical field, banking sector, agricultural sector, field of engineering and more. Information and Communication Technology has substantially eased operations in several fields and has helped to save resources in the likes of labor, cost and time. It has also helped to drastically increase the speed at which work is done. This paper reviews the impact of information and communication technology in civil engineering practice and examines operations such as the construction industry, road transportation industry, engineering education, structural engineering, energy efficient buildings, building preservation and engineering design. Information and Communication Technology is seen to be very relevant for sustainability in civil engineering practices across literature.
Proceedings of International Structural Engineering and Construction, May 1, 2019
Self-compacting concrete (SCC) flows through densely steel reinforced elements and consolidates u... more Self-compacting concrete (SCC) flows through densely steel reinforced elements and consolidates under self-weight without need for vibration or compaction. This helps in complex and densely reinforced structures. The integration of fibers and fillers in concrete improves its general properties. The addition of fibers in particular can regulate the flow and workability of the concrete; hence, the high workable nature of SCC can be an ideal mix for the incorporation of fibers. This research investigates the effect of bamboo fibers and limestone powder on the fresh properties of selfcompacting concrete. Bamboo fibers of an aspect ratio of 50 and varied volumes of 0.25%, 0.5%, 0.75% and 1% were adopted for this research. The workability of the mix was assessed by slump flow test and V-funnel test. For fiber volumes of 0.25%, 0.5%, 0.75%, it was observed that the coarse aggregate was evenly distributed across the spread, indicating good viscosity and stability of the mix. The presence of 10% percent limestone powder improved the workability of the concrete mix. This can be attributed to filler properties of limestone powder, which, affecting the cement particle system, changed the ordinary distance between them and modified the water quantity available for the hydration process. These results proved that the bamboo fiber and limestone powder can be sustainably adopted to regulate the flow-ability of SCC without compromising desired properties.
Effects of cashew nutshell ash on the thermal and sustainability properties of cement concrete
Heliyon, Nov 1, 2022
A Review on Steel Connections and Structural Behavior
IOP conference series, Apr 1, 2021
The demand for the use of steel in the construction industry has been on the increase over the ye... more The demand for the use of steel in the construction industry has been on the increase over the years due to its several advantages over several other construction materials. Some of these advantages are light weight, ease of constructability and durability. In the constructability of a steel structure, the three major connection types that have been used in steel structure construction are the riveted connection, bolted connection and the welded connection and the type of connection employed in a steel structure has been seen to have a great influence on the steel structural behavior and the condition for operation. Hence, the condition of service and acceptable behavior of steel structure should guide the choice of connection to be employed in any steel structure. To this end, this paper reviews connections types and the structural behavior.
Fibers, Jul 1, 2021
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Application of machine learning techniques in the prediction of excess lifetime cancer risks of agricultural byproducts used as building and construction materials
Cleaner Waste Systems
Compressive Strength of a Prescribed Control Mix for High Performance Self-compacting Concrete
IOP Conference Series: Materials Science and Engineering, 2021
Another way of improving concrete production involves incorporating the unique features of high p... more Another way of improving concrete production involves incorporating the unique features of high performance concrete with the special properties of self-compacting concrete, resulting in another type of concrete called high performance self-compacting concrete (HPSCC). Many researchers have developed diverse designed control mix for HPSCC which were obtained through several and rigorous designed trial mixes. Yet, little work has been done on prescribed control mix for HPSCC. The purpose of this paper is to establish a prescribed control mix ratio for HPSCC and to test by conducting compressive strength test. Review of the various designed control mix ratios is done in this paper. A logical prescribed control mix ratio of 1:1.02:0.95 has been established for an HPSCC with 0.36 w/c proportion, 0.02 superplasticizer/cement proportion. The compressive strength gave 36.10 MPa at 7 days curing age, 41.76 MPa at 14 days curing age and 57.29 MPa at 28 days curing age. This strength result s...
A review on the impact of information and communication technology in civil engineering practice
IOP Conference Series: Materials Science and Engineering, 2021
Information and Communication Technology is playing a vital role in virtually almost every field ... more Information and Communication Technology is playing a vital role in virtually almost every field of human operation such as education sector, medical field, banking sector, agricultural sector, field of engineering and more. Information and Communication Technology has substantially eased operations in several fields and has helped to save resources in the likes of labor, cost and time. It has also helped to drastically increase the speed at which work is done. This paper reviews the impact of information and communication technology in civil engineering practice and examines operations such as the construction industry, road transportation industry, engineering education, structural engineering, energy efficient buildings, building preservation and engineering design. Information and Communication Technology is seen to be very relevant for sustainability in civil engineering practices across literature.
Optimizing the Rheology of Concrete modified with High Silica and Alumina Precursor for Normal Workability in the Built Environment
IOP Conference Series: Materials Science and Engineering, 2021
Concrete performance in its fresh state is not only pertinent for proper concrete placement, cons... more Concrete performance in its fresh state is not only pertinent for proper concrete placement, consolidation, and finishing but also its properties in its hardened state. Thus, this study optimized the rheology of concrete modified with high silica and alumina precursor (cashew nutshell ash (CNA)). Cashew nutshell was recycled, and the ash obtained was used at 5, 10, and 15 wt.% of cement using the concrete mix designs of grades C 25-40 to attain the target strengths of 25-40 MPa at 28 days. Both slump and its corresponding compressive strength were determined. Moreover, the concrete slump was optimized using the experimental mix design properties (EMDPs) such as cementitious materials, water/cementitious materials, and cementitious materials/aggregate ratios, as independent (continuous variables). The findings showed that EMDPs influenced the rheology of fresh concrete, significantly, hence yielding an optimized high precision with 99 % R2. Therefore, the model can be used to predict...
Uploads
Papers by Engr. solomon oyebisi