Browsing by Author "Koswattage, KR"

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item: Conference-Full-text
A comparative study on the mechanical properties of concrete by substituting cement with sugarcane bagasse ash
(IEEE, 2023-12-09) Sankeeth, S; Kumara, BS; Damruwan, HGH; Herath, HMST; Lewangamage, CS; Koswattage, KR; Abeysooriya, R; Adikariwattage, V; Hemachandra, K
This research study compares the mechanical properties of concrete by substituting Sugarcane Bagasse Ash (SCBA) at various weight ratios for Ordinary Portland Cement (OPC) and Portland Composite Cement (PCC). The study was mainly concerned with determining the consistency, setting time, workability, compressive strength, and split tensile strength of concrete mixes containing different percentages of SCBA. Three replacement scenarios were considered into account: 0% SCBA (control sample), 5% SCBA, and 10% SCBA, which would have replaced both OPC and PCC. Various tests were conducted according to relevant standards to evaluate the performance of the concrete mixes. The results revealed that replacing 10% of OPC with SCBA performed better than replacing PCC and the control samples. Higher compressive strength and split tensile strength were among the improved mechanical characteristics of the concrete mixtures with 10% SCBA. These results show the possibility of using SCBA as a partial cement substitute to enhance the overall performance of concrete, especially when replacing OPC. This research offers important insights into sustainable construction practices by identifying SCBA as a feasible cementitious material with favorable economic and environmental effects. The results may assist researchers and concrete experts in optimizing the use of SCBA in concrete mix designs to achieve desired mechanical properties and enhance sustainability in the construction industry.
item: Conference-Full-text
A conceptual overview: integration of bi-directional electric vehicle (ev) chargers for effective peak grid demand management in Sri Lanka
(IEEE, 2023-12-09) Induranga, DKA; Tharaka, VPV; Perera, WMKG; Priyadarshana, HVV; Koswattage, KR; Abeysooriya, R; Adikariwattage, V; Hemachandra, K
This paper presents an energy analysis of the integration of bi-directional electric vehicle (EV) chargers for managing peak grid demand in Sri Lanka. This study addresses the challenges posed by peak demand and the way to address these issues with EV technology. The concept of bi-directional EV chargers is introduced, allowing EVs to both consume and feed energy back into the grid. The researchers calculated the benefit of using vehicle-to-grid (V2G) feeding systems for the years 2030 and 2040 assuming that the number of EVs is 10% of the total number of motor cars in the country. This method can provide 25% of the energy requirement of the current peak demand in Sri Lanka. Furthermore, this paper provides valuable insights that can guide further research and development in this area, contributing to sustainable grid utilization and EV adoption.