Category Archives: International Journal of Engineering and Emerging Scientific Discovery, volume 7, number 1, 2022

USE OF QUARRY DUST TO REPLACE SAND IN SANDCRETE BLOCKS

Auwalu Saidu¹, Ahmad Sani² and Aaron Samuel Kafinta³

Department of Civil Engineering Technology

Federal Polytechnic Bauchi

Email:auwalusaidu9@gmail.com¹,asani.cet@fptb.edu,ng²andskaaron@fptb.edu.ng³

ABSTRACT  

The research wasbasedon an investigation of the optimum quantity of quarry dust required to replace sand content in sandcrete blocks, which would yield best quality products. The cement was combined with fine aggregates in ratio of 1:8. The percentage replacements of sand by quarry dust were: 0%, 5%, 15%, 25%, 35% and 45% by volume of fine aggregate. Sieve analysis was carried out to classify the sand and quarry dust. Forty-five sandcrete blocks of 150mm × 225mm × 450mm were produced and tested. Compressive strength test and hygric property (porosity and sorptibity) analysis were conducted. From the results, an increase in compressive strength with the increase in quarry dust was observed. The compressive strength reached its optimum values at 15% replacement, and the values are: 2.18, 2.28, and 2.55N/mm² at the age of 7, 14, and 28 respectively. Beyond 15% replacement, increase in quarry dust decreases the compressive strength of the sandcrete blocks. Also, it was observed that, increase in quarry dust decreases porosity and sorptivity.

DESIGN AND IMPLEMENTATION OF AN IoT BASED MONITORING AND PROTECTION SYSTEM FOR DISTRIBUTION TRANSFORMERS

¹Ogbekhiulu A., J. &²Agbontaen F. O

¹Department of Electrical and Electronic Engineering,

College of Engineering and Technology,Federal University of Petroleum Resources, Effurun.

²Departmentof Electrical / Electronic Engineering,

Faculty of Engineering, University of Benin, Benin City, Edo State.

Email: ogbekhiulu.joseph@fupre.edu.ng

ABSTRACT

Transformers are the main components in a power system. Any fault in the transformer adversely affects the balance of a power system. The faults are mainly occurring due to overloading and inefficient cooling system in the transformer. This paper present a real time monitoring system of the health condition of distribution transformer using IOT (Internet of Things) Technology. Parameters such as temperature, oil level, humidity, voltage, current and location of a transformer are monitored, processed and recorded in servers. The system also have an anti-theft security (alarm) system as well as surveillance camera and backup security lighting unit for late hours for the protection of the substation against vandals and unauthorized personnel having access to it. The database used in this paper is the firebase database and it can be accessed from anywhere around the world using IoT technology through HTTP protocol. Messages are sent to pre-stored mobile numbers when any abnormalities in the parameters being monitored is observed using existing network. This helps in identifying and solving a problem before a failure could occur in the system without human dependency.The transformer parameters are monitored on a mobile application with the access being controlled remotely via the mobile application designed for the system. The transformer automatically isolated the load/consumer loads from the power supply when load current, oil temperature increases beyond the preset values. An alarm gets activated and the ESP32 camera captures the intruder when unauthorized personnel try to access the power substation. The system was then implemented and tested. The results obtained indicates that the parameters of the transformer and the substation can be conveniently monitored using IoT technology. 

Keywords: IoT, Distribution Transformers, Mobile Application, Firebase Database, ESP 32

DESIGN AND IMPLEMENTATION OF A SMART PARKING LOT

J. A. Ogbekhiulu¹ and A. M. Epemu²

¹Department of Electrical and Electronic Engineering,

College of Engineering and Technology,

Federal University of Petroleum Resources, Effurun Email: ogbekhiulu.joseph@fupre.edu.ng

ABSTRACT

This paper present the design and implementation of a smart parking lot.  The design involves three parking lots and a prototype parking environment constructed with wood. The design was achieved by programming a PIC 16f84a using C program that receives its input from different infrared ray sensor located at the different entrance of the parking lots, then processes the input and sends the output to a seven segment display LCD. The design is a prototype that is intended to solve the issues of proper parking in urban areas, business centers, and University environment. It reduce the stress caused by indiscriminate parking of cars and any form of danger or insecurity to cars and owners. The prototype design was simulated in Proteus environment and then implemented. The results obtained indicates that parking of cars in urban areas, business center and University environment could be controlled and indiscriminate parking and theft of cars could be eliminated.

Key words: Prototype, simulated, parking, programing, environment