Browsing by Author "Jayasinghe, C."

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item: Conference-Abstract
Developing a masonry block by using glass waste as an alternative material
(Department of Civil Engineering, 2023-09-27) Hasaranga, O. M.; Jayasinghe, C.; Mallikarachchi, C; Hettiarachchi, P; Herath, S; Fernando, L
The global concern of solid waste management has led to an urgent need for innovative solutions. Among these challenges is the substantial presence of post-consumer glass waste in solid waste streams, causing environmental issues and posing recycling dilemmas. The accumulation of glass waste exacerbates environmental problems, necessitating effective strategies for waste reduction and resource conservation. An intriguing avenue to address waste management challenges while conserving natural resources is the incorporation of waste glass as a substitute for fine aggregate in masonry blocks. To investigate the viability of this solution, a comprehensive experimental study was undertaken. The study primarily focused on utilising industrial waste glass as a replacement for fine aggregate in masonry block production. The experimental setup encompassed an array of tests, including the evaluation of compressive strength, water absorption, moisture content, spray erosion resistance, and the determination of dry, wet, and bulk densities of the masonry blocks. Four distinct concrete mix designs were formulated, with varying proportions of M/sand being replaced by a combination of glass waste and quarry dust. The results revealed that the mix design substituting 25% of M/sand with glass waste exhibited remarkable performance across multiple parameters. This particular mix design demonstrated enhanced compressive strength, improved water absorption characteristics, optimal moisture content levels, and excellent spray erosion resistance. Notably, the performance of this mix surpassed that of the controlled mix, emphasising the potential of waste glass as a sustainable alternative in masonry block production. Additionally, panel testing was conducted to assess the structural integrity of the masonry blocks with the highest compressive strength mix design. This testing confirmed the exceptional performance of the mix designs, showcasing results that exceeded the requirements stipulated in relevant codes. In conclusion, the incorporation of waste glass as a substitute for fine aggregate in masonry blocks presents a promising avenue for sustainable waste management and resource conservation. The findings from this comprehensive study underscore the viability of this approach, emphasising the potential to mitigate waste accumulation while enhancing the performance of masonry block structures.
item: Article-Full-text
Ranking of walling materials using eco-efficiency for tropical climatic conditions: A survey-based approach
(Elsevier, 2021) Gurupatham, S.V.; Jayasinghe, C.; Perera, P.
All over the world, “Construction” is an important sector that consumes a significant amount of resources and produces a lot of waste. Buildings as a whole share nearly one-fourth of total electricity generation in tropical countries that results in adverse effects on the natural environment and their national economies. Enhancing the building energy efficiencies relies on material and technology selection that complement the local climatic conditions. Compressed Stabilized Earth Blocks are considered as an innovative and proven building envelope upgrade that enhances building efficiencies both economically and environmentally considering their cradle-to-gate phase. However, the cradle-to-grave life cycle impacts of Compressed Stabilized Earth Blocks compared to conventional walling materials are yet to be assessed in tropical climatic conditions for long-term decision making. Accordingly, the objective of this study is to compare compressed Stabilized Earth Blocks with conventional walling materials such as Burnt Clay Bricks and Cement Sand Blocks. The life cycle thinking approach was integrated with eco-efficiency analysis to compare and evaluate the above-mentioned materials considering their entire life span from cradle to grave. Accordingly, Compressed Stabilized Earth block has been selected as the more efficient material with environmental benefits. Moreover, since it can be used as a walling element even without the application of plaster, costs and environmental impacts could be further reduced when used without plastering. The findings of this research will encourage building developers, contractors, and practitioners in selecting the most desirable material for their projects considering costs and environmental impacts of the material life cycle.