http://ir.lib.ruh.ac.lk/handle/iruor/16069 Sat, 04 Apr 2026 20:50:22 GMT 2026-04-04T20:50:22Z http://ir.lib.ruh.ac.lk/handle/iruor/16118 Development of a Formula to Quantify Emissions Generated from Diesel Vehicles in Sri Lanka Konara, K.M.T.N.; Samarasekara, G.N.; Chaminda, G.G.T.; Perera, S.; Dissanayaka, A.W. Unprecedented increase of greenhouse gases (GHG) have become a burning issue in the current world. Mainly Carbon dioxide (CO2) is the most critical pollutant causing greenhouse effect. Approximately 50% of the total emissions in Sri Lanka is from transportation sector while road transportation is responsible for 88%of it. Being a CO2 intensive country due to transportation, determination of vehicle emission levels as well as maintaining them in lower level is very important. This study is focused on the investigation of a model to calculate emission from diesel vehicle exhaust. This model was derived based on optical properties and the chemical composition of diesel exhaust. Basically CO2, Carbon monoxide (CO), Particulate matter (PM) are the pollutants that can be quantify through the calculation procedure. Formulas derived were direct function of the K factor which ■> is the current result of diesel vehicle emission testing program. Quantification of major pollutants of diesel exhaust is enabled from these derived formulas. Thereby decision makers could be able to verify and impose different emission standards to diesel vehicles based on the emission of pollutants rather than K factor. Thu, 16 Mar 2017 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/16118 2017-03-16T00:00:00Z http://ir.lib.ruh.ac.lk/handle/iruor/16117 Arial Patrol for Bridge Routine and Post Earthquake Emergency Inspection Using Small Aerial Photography UAV Dang, J.; Haruta, D.; Shrestha, A.; Endo, H.; Matsunaga, S.; Kasai, A.; Wang, X. In this paper, the possibility of use General Purposed UAVs is verified by a series of tests. A smart device based control app is developed based on the Software Development Kit (SDK) released by the UAV maker for developers. The basic performance of UAV for structure inspection such as flight time, flight velocity and wind resistance are evaluated by Payload tests, single pattern flight test, and wind tests. Based on the test results, an emergency inspection simulation is conducted to verify the possibility of used this method in a real bridge. Onsite verification of this method is conducted to inspect a 143m high 400m long steel arch bridges and a steel girder concrete pier bridge with rubber bearings damaged in the recent 2016 Kumamoto Earthquake. Thus, the feasibility of the bridge inspection using small Aerial Photography UAV was verified in this study. Thu, 16 Mar 2017 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/16117 2017-03-16T00:00:00Z http://ir.lib.ruh.ac.lk/handle/iruor/16104 Investigation on Modified Hot Mix Asphalt Concrete with PET as Binder Additive and Fly Ash as Filler Muhammed, M.H.; Rengarasu, T.M.; Bandara, W.M.K.R.T.W. Suitability of modified Hot Mix Asphalt Concrete (HMA) with waste materials was investigated in this study. Marshall stability, Marshall flow and air void ratio were used as criteria to measure the suitability of modified HMA. The waste materials tested were coal fly ash, and PET. Fly ash was used to replace part of filler in HMA while PET was used to modify bitumen binder. Bitumen content was varied from 4% to 6% at 0.5% interval. PET was added in the percentage of 5%, 10% and 15%>. Stone dust, widely used conventional filler, was replaced by fly-ash at 20%), 30%> and 40%>. Results showed that PET used as additive increased the Marshall stability and reduces Marshall flow and air voids. Addition of fly ash increased the Marshall stability compared to unmodified HMA. It was concluded that, addition of fly ash and PET in the same sample increases the Marshall stability by 83.57% and reduces Marshall flow and air voids. Thu, 16 Mar 2017 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/16104 2017-03-16T00:00:00Z http://ir.lib.ruh.ac.lk/handle/iruor/16103 Effects of Temperature Variation on Hot Mix Asphalt Concrete with Saw Dust Ash Used as Aggregates Yasanth, R.G.N.; Renqarasu, T.M.; Jegatheesan, N.; Bandara, W.M.K.R.T.W. This study attempts to identify the sensitivity of modified Hot Mix Asphalt concrete for temperature variation. Saw dust ash was used as a partial replacement of the conventional filler used in contemporary road construction with Hot Mix Asphalt concrete. The samples were subjected to two different temperature conditions modelled by a 20-minute period in a hot temperature bath under the tested temperatures of 35°C and 60°C. The filler replacement was based on constant volume exchange and a saw dust ash weight of 30g was introduced to the mix. The Marshall Stability and Flow values of the modified Hot Mix Asphalt mixtures were recorded compared to two distinct control samples each tested under same temperatures as the saw dust ash added samples. According to the study, the saw dust addition will be highly vulnerable to malfunctioning under higher temperature conditions. However, saw dust ash could still be used as a partial filler replacement under low temperatures and for local roads with medium traffic. Thu, 16 Mar 2017 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/16103 2017-03-16T00:00:00Z