Volume X Issue IX

Volume X Issue IX

3 paper(s)

SN	Title	Authors	Page No.
1	Implementation of Process Level Control System	Kingsley Ugochukwu Walter Ikpo	01-04
2	Suitability Assessment of Sabon Kaura Pit Gravel as Coarse Aggregate in Concrete Production	Agboola Shamsudeen Abdulazeez, Mamman Adamu Idi, Amina Omolola Suleiman, Simdima Gabriel Gideon	05-12
3	Access Control System Using Finger Print Biometric System	Abutu Silas	13-16

Implementation of Process Level Control System

Kingsley Ugochukwu Walter Ikpo · September 2021 · pp. 01-04

An automatic control suitable for process level sensing and control was realized using the Ultrasonic sensor. This enabled the entire circuit to function as a threshold detector; thereby working as an ON and OFF switch. The proposed process level sensor was tested in real time application by using it to control the level of water in a tank fed by a single phase 1/2HP pump. Experimental performance results indicated that the device is quite suitable for the desired operation, since it maintained the set maximum and minimum levels of 100 litres and 10 litres respectively, by switching the pump on or off as required.

Suitability Assessment of Sabon Kaura Pit Gravel as Coarse Aggregate in Concrete Production

Agboola Shamsudeen Abdulazeez, Mamman Adamu Idi, Amina Omolola Suleiman, Simdima Gabriel Gideon · January 2021 · pp. 05-12

There is global need for the preservation of natural resources. Natural resources in the world are continuously decreasing due to manufacturing of the products and this has negative impact on the environment. Aggregates constitute large ratio by weight concrete production. Recently the approach is to research for alternative that will serve the purpose of the natural aggregates in concrete for sustainable construction. One approach to contribute to sustainable construction is to partially or totally replace natural aggregates. Pit gravel is a suitable material for replacement of aggregate in concrete production. Specific gravity as well as bulk density, porosity, Impact value, crushing value for both conventional aggregate and pit gravel were carried out. Workability, compressive strength and flexural strength properties of concrete produced with 100% conventional aggregate and pit gravel were carried out with a mix ratio 1:2:3 and water-cement ratio of 0.5 were examined and compared. The concrete was tested at 3, 7, 14 and 28 days’ hydration periods. The results showed that concrete with both conventional and pit gravel has a medium workability. The highest compressive strength at 28 days was 27.53N/mm2 for conventional aggregate concrete as compared to 26.61N/mm2 for pit gravel concrete. The highest flexural strength at 28 days was 5.73N/mm2 for conventional aggregate concrete as compared to 5.67N/mm2 for pit gravel concrete. The strength test results indicated that conventional aggregate concrete gave better strength compared to pit gravel concrete. The research recommends use of pit gravel to fully replace conventional aggregate in concrete.

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Access Control System Using Finger Print Biometric System

Abutu Silas · September 2021 · pp. 13-16

Fingerprint identification is no longer the preserve of crime detection or science fiction. It’s widely used in access control because it’s a very reliable straightforward verification method unlike the traditional lock systems, passwords which were found not to secure perfectly. The major reason for this study is to provide an advance security for such high end security applications. The aim of this study is to design an access control system using finger print biometric system. This is to grant access only to authorized persons. An emergency alarm is incorporated to deter an intruder trying to gain access.