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All Journal International Journal of Education, Science, Technology, and Engineering (IJESTE) International Journal of Recent Technology and Applied Science (IJORTAS) Journal of Engineering, Technology, and Applied Science (JETAS)
Uche, Chikadibia Kalu Awa
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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Utilization of Crumbs from Discarded Rubber Tyres as Coarse Aggregate in Concrete: A Review Eze, Val Hyginus Udoka; Uche, Chikadibia Kalu Awa; Chinyere, Ugwu; Wisdom, Okafor; Chukwudi, Ogenyi Fabian
International Journal of Recent Technology and Applied Science (IJORTAS) Vol 5 No 2: September 2023
Publisher : Lamintang Education and Training Centre, in collaboration with the International Association of Educators, Scientists, Technologists, and Engineers (IA-ESTE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36079/lamintang.ijortas-0502.559

Abstract

This research work successfully reviewed twenty-five papers on waste rubber tyres and their related areas. The chemical and physical properties of concrete constituents such as cement, water, sand and rubber crumbs were reviewed together with their mix ratios. The use of Tyre Rubber Crumbs (TRC) to replace coarse aggregates makes concrete construction work cheaper and its low water absorption rate improves the concrete mix properties such as compressive strength and workability. Hence, in road pavement construction, the use of TRC in asphalt modification is the best and smartest innovation for sustainable development and waste material reuse. This research showed that waste TRC are very essential in the replacement of some aggregates in the construction industries resulting in very high-quality construction and as well minimize construction costs.
Investigating the Viability of Rubber Crumbs from Waste Tyres as Partial Replacement for Coarse Aggregates in Concrete Uche, Chikadibia Kalu Awa; Eze, Val Hyginus Udoka; Kitaata, Paul; Chranimah, Muhereza; Ukagwu, Kelechi John; Barah, Obinna Onyebuchi; Edozie, Enerst
International Journal of Recent Technology and Applied Science (IJORTAS) Vol 6 No 2: September 2024
Publisher : Lamintang Education and Training Centre, in collaboration with the International Association of Educators, Scientists, Technologists, and Engineers (IA-ESTE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36079/lamintang.ijortas-0602.616

Abstract

The number of waste tyres is on the increase, because of the growing use of transport vehicles. Almost one trillion waste tyres are generated in the world annually. Established methods of disposal, recycling and re-use of waste tyres have failed to keep pace with generation, proven to be ineffective, cost-intensive and in some cases environmentally unsustainable. This study aims to investigate the effects of utilizing crumbs from discarded rubber as a partial replacement for coarse aggregates in concrete. Rubber crumbs of 10 – 20mm nominal size were produced manually from waste tyres. The rubber crumbs were used to replace 10%, 20% and 30% of coarse aggregates in design concrete of 20N/mm2 target compressive strength. The effects of this material on the slump, water absorption and compressive strength of concrete were examined. The inclusion of rubber crumbs resulted in a decline in the slump of concrete up to 10% relative to the control specimen. Water absorption increased marginally at 10% replacement compared to the control specimen and recorded a maximum value of 0.77% with 30% replacement after 28 days of curing. The compressive strength of the concrete was negatively affected by the rubber crumbs. The maximum value of 13.9N/mm2 was attained at 10% replacement after 28 days of curing. Rubberized concrete with 10% replacement of coarse aggregates can be used for non-structural concrete members such as roof slabs, non–load–bearing partition walls, and roadside barriers. Chemical treatment of rubber crumbs to improve surface adhesion properties should be encouraged.
Innovative Design and Implementation of Portable and Rechargeable Air Purifier and Humidifier Ukagwu, Kelechi John; Enzoionzi, Azando Isaac; Eze, Val Hyginus Udoka; Uche, Chikadibia Kalu Awa; Ukagwu, Faith
International Journal of Recent Technology and Applied Science (IJORTAS) Vol 6 No 1: March 2024
Publisher : Lamintang Education and Training Centre, in collaboration with the International Association of Educators, Scientists, Technologists, and Engineers (IA-ESTE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36079/lamintang.ijortas-0601.618

Abstract

This study presents the innovative design and successful implementation of a Portable and Rechargeable Air Purifier and Humidifier (PRAPH) aimed at addressing indoor air quality issues in Uganda. The device combines air purification and humidification functionalities into a compact, user-friendly, and energy-efficient unit. The design phase of the PRA-PH involved a thorough analysis of existing air purifiers and humidifiers, identifying key limitations such as limited portability, energy inefficiency, and complex maintenance requirements. The system incorporates high-efficiency particulate air (HEPA) filters, activated carbon filters, and ultrasonic humidification technology to effectively remove particulate matter, allergens, and airborne contaminants while simultaneously maintaining optimal humidity levels. A rechargeable lithium-ion battery was integrated to ensure portability, enabling users to use the PRA-PH without relying on a constant power source. Additionally, smart sensors and microcontroller-based control systems were employed to automate the device's operation, adjusting purification and humidification settings based on real-time air quality measurements. The PRA-PH was subjected to rigorous testing to evaluate its efficiency in purifying air and maintaining suitable humidity levels across various indoor environments. The results demonstrated significant improvements in air quality, showcasing the device's ability to effectively remove pollutants and maintain a comfortable humidity range. This study contributes to a portable and rechargeable air purifier and humidifier system that addresses the limitations of existing solutions. The PRA-PH's innovative design, efficient operation, and user-friendly interface make it a promising option for individuals seeking a convenient and effective way to improve indoor air quality and enhance the overall well-being of Ugandans.
Design of a Solar Powered Water Supply System for Kagadi Model Primary School in Uganda Uche, Chikadibia Kalu Awa; Udoka, Eza Val Hyginus; Kisakye, Abigaba; Maxwell, Kugonza Francis; Wisdom, Okafor O.
Journal of Engineering, Technology, and Applied Science (JETAS) Vol 5 No 2: August 2023
Publisher : Lamintang Education and Training Centre, in collaboration with the International Association of Educators, Scientists, Technologists, and Engineers (IA-ESTE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36079/lamintang.jetas-0502.548

Abstract

The presence of water is a prerequisite condition for the existence and sustainability of life on the planet. Adequate supply of clean water is even more significant for a primary school as it ensures hydration, sanitation, hygiene leading to a general wellbeing of the pupils. This research work successful designed a solar powered water supply system for Kagadi Model Primary School (KMPS) and its environs. The research design takes into account the population of the students, total daily water demand, water source potential in terms of quality and quantity and insolation potential of the study area which formed the bed bedrock of the suitable location of the designed system. This developed system will help to distribute water fairly to the KMPS and its environ at very a cheap and steady manner for the pump will be powered with solar energy. The solar water pump will be energized using solar energy system to pump water into the storage facility (reservoir) before distributing it by the help of gravitational force to various locations for consumption. This designed solar powered energy system when implemented will curb the problem of water scarcity, provide clean water and reduce unhygienic nature of the environment as it in line with Sustainable Development Goals (SDGs). This study recommends the implementation of this design to provide clean and steady water supply for the residents of the study area.
A Comparative Analysis of Renewable Energy Policies and its Impact on Economic Growth: A Review Eze, Val Hyginus Udoka; Edozie, Enerst; Wisdom, Okafor; Uche, Chikadibia Kalu Awa
International Journal of Education, Science, Technology, and Engineering (IJESTE) Vol 6 No 2: December 2023
Publisher : Lamintang Education and Training Centre, in collaboration with the International Association of Educators, Scientists, Technologists, and Engineers (IA-ESTE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36079/lamintang.ijeste-0602.555

Abstract

Renewable energy has been identified as a critical component of global efforts to address climate change, enhance energy security, and foster sustainable economic growth. As a result, many countries have implemented renewable energy policies to promote the development and deployment of renewable energy technologies. However, the impact of these policies on economic growth remains a subject of debate. This article provides a comparative analysis of renewable energy policies and their impact on economic growth. The study employs a systematic review of the literature and utilizes qualitative and quantitative methods to compare renewable energy policies and their economic impacts across different countries. The findings suggest that the impact of renewable energy policies on economic growth varies across countries and is influenced by factors such as policy design, institutional context, and economic structure. This research article finally, examined the challenges associated with implementing renewable energy policies, analyzed the implications of the findings for policymakers and further gave some potential solutions that will help the policymakers and future researchers.
Co-Authors Barah, Obinna Onyebuchi Chinyere, Ugwu Chranimah, Muhereza Chukwudi, Ogenyi Fabian Edozie, Enerst Enzoionzi, Azando Isaac Eze, Val Hyginus Udoka Kisakye, Abigaba Kitaata, Paul Maxwell, Kugonza Francis Udoka, Eza Val Hyginus Ukagwu, Faith Ukagwu, Kelechi John Wisdom, Okafor Wisdom, Okafor O.