The bearing capacity of subgrade soils is necessary for the design and construction of transportation infrastructure, such as roads, and airfields. The determination of bearing strength of soil could be tedious, expensive and time-consuming. There is need to establish models that would predict the bearing strength parameters such as California bearing ratio (CBR) using simple and less time-consuming laboratory tests. This study examines the relationship between CBR and index properties of Makurdi shale.
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This project focuses on the design and construction of a vehicle speed detection system using infrared (IR) sensors and an Arduino-based microcontroller (Atmega328). The system aims to enhance road safety by monitoring and reporting vehicle speeds on highways, particularly in areas prone to accidents due to over-speeding. With the increasing rate of road traffic accidents caused by reckless driving, especially on highways, this system serves as a preventive measure by alerting drivers when they exceed the designated speed limit.
The study assessed the durability of stabilized earth brick modified with Sawdust Ash (SDA) and Terrasoil Nano chemicals (TNC). The study determined the geotechnical properties and the chemical compositions of laterite. Physical properties of Saw Dust calcined at 600°C and resulting to SDA were assessed using standard methods. Modified Laterite brick with varying proportions of SDA to soil (0, 2, 4, 6, 8, and 10)% and TNC to soil (0, 2 and 5)% were used to make cube specimen of 150×150×150mm.
Metal Inert Gas (MIG) welding is pivotal in industrial applications due to its efficiency and quality,
with solidus temperature critically influencing weld integrity. This study investigates the effects of
current (240–270 A), voltage (23–26 V), and wire feed rate (2.4–3.0 mm/s) on solidus temperature
of mild steel metal plate, integrating experimental data, Response Surface Methodology (RSM), and
an Artificial Neural Network (ANN) to develop predictive models. Experimental results revealed
The construction industry is under increasing pressure to reduce carbon emissions and explore
sustainable building materials. This study investigates wood ash as sustainable cementitious
material by partially replacing cement in concrete. Wood ash has the potential and pozzolanic
properties that possibly can enhance concrete strength and performance.. Concrete mix were
prepared with wood ash replacement of cement, 0%, 5%, 10%, 15% and 20% using a concrete mix
Access to clean and safe drinking water is essential for human health and well-being. This study evaluates the water quality of well water in Obudu Local Government Area, Cross River State, Nigeria, by correlating the Water Quality Index (WQI) with various physical, chemical, and bacteriological parameters. 65 well water samples were analysed using the Oregon WQI model,incorporating parameters such as temperature, electrical conductivity, pH, turbidity, total dissolved solids (TDS), heavy metals, and microbial contaminants.
An automated lawn mower is a machine designed to cut grass without requiring human guidance or
control. With the continuous advancements in technology, automation has become integral to
nearly every aspect of modern life. From household appliances to industrial machinery, automation
has transformed the way we interact with our environments, reducing manual labour and
improving overall efficiency. The emergence of automated lawn mowers follows this trend,
Efficient ventilation and air conditioning (VAC) systems are crucial for maintaining indoor air
quality and thermal comfort. This study evaluates the performance and optimization of the VAC
system at Crown Height Pavilion Event Center, Benin City. Key parameters such as airflow rate,
cooling load, temperature variation, humidity levels, power consumption, energy efficiency, and the
coefficient of performance (COP) were analyzed to determine system efficiency. Field
measurements revealed an airflow rate of 119.1 CMM, below the ASHRAE-recommended 127.35
Civil engineering projects involve multiple activities, spanning a large area of land, and entailing
the possibility of subterranean conditions making them extremely risky. Road construction involves
risk from the beginning to the ending and can significantly impact any one of the project's
components, such as cost, quality, timeliness, and scope. This study considered selected
construction companies within the South East geopolitical zone of Nigeria as a case study to
Traffic congestion in road transportation presents a significant issue for both developed and developing nations. This research leverages artificial intelligence (AI) to assess, retime, and analyze pre-timed traffic signals in the Oredo local government area of Edo State, where vehicle volume has recently surged. Traffic data, including vehicle flow, composition, and movement, was manually recorded at 15-minute intervals.