Department of Civil Engineering



SEMINARS - CIVIL ENGINEERING RESEARCH CLUB

Civil Engineering Research Club (CERC) is a platform for the full-time PhD, MPhil and MScEng students to give recognition for their work and it also motivates students to carry out their research in an efficient and effective manner while building up a friendly environment among the students and staff. Providing a peer-learning environment to open up possibilities for collaborative research is one of the intended outcomes.


Upcoming Presentations

Date
Time
Venue
Presenter/s Research Title Abstract

Previous Presentations

Date 20th April 2021
Time 2.00 p.m. - 3.00 p.m.
Venue Via ZOOM
Presenter/s Research Title Abstract
Eng. H.M.P. Wijeyawardana
Ph.D. Candidate (Environmental Engineering), RMIT-UOP Split Ph.D. Programme
Urban runoff (UR) is a major nonpoint source pollutant degrading the water quality of the receiving waters and heavy metals are identified as a most critical pollutant group in UR. The limited availability of land poses tight constrains to common methods adopted for managing UR like detention and retention basins such as swales, bio retention basins, settlement ponds and wetlands to improve water quality. Although evidence of use of pervious concrete in the urban environment is present, little effort is made towards enhancing its pollutant removal capability. Therefore, this study will focus on enhancing the heavy metal removal ability of pervious concrete using a low-cost adsorbent material, bio char.
Eng. (Ms.) K.S.D.M. Fernando
Ph.D. Candidate (Geotechnical Engineering), RMIT-UOP Split Ph.D. Programme
Fly ash and Rice Husk Ash (RHA) are abundantly available waste products, principally located in Asian countries. Currently, a significant proportion of these materials are disposed of in landfills, lagoons and rivers but offer potential to utilize in AAC. This study quantifies the environmental and economic factors by assessing the Greenhouse gas (GHG) emission, environmental impacts and benefits, and cost analysis of utilizing fly ash and RHA in AAC compared to Portland Cement (PC) concrete. Alkaline activator is a key component responsible for the highest GHG emission, cost and environmental impact amounts obtained for fly ash geopolymer and blended alkali-activated concrete compared with PC concrete. Utilization of waste fly ash and RHA is responsible for providing significant benefits in terms of fresh and marine water ecotoxicity by avoiding waste disposal at the dumpsites, rivers, and storage lagoons.
Eng. M. Kesavan
Ph.D. Candidate (Materials Engineering), University of Peradeniya
This study intended to extensively investigate on the factors influencing labour performance in the Sri Lankan construction industry. A qualitative study conducted from a literature review and a series of interviews revealed 117 factors under 6 categories. Subsequently, a questionnaire survey was carried out among the construction firms in Sri Lanka and the responses were received from 217 contractors. Overall, 73 factors were identified as critical based on their Relative Importance Index values. Lack of training facilities, delay in salary payments, lack of labour motivation, low salary for labourers and poor performance evaluation of labour skills were found as the top five ranking factors. This study also highlights the need for training programmes that contain the direct scope of productivity improvement, and identified the expected programme outcomes for the effective design of new training programmes to improve the practices on labour operations.

Date 16th February 2021
Time 2.00 p.m. - 3.00 p.m.
Venue E.O.E. Pereira Theatre
Presenter/s Research Title Abstract
Eng. L.M.L.K.B. Lindamulla
Ph.D. Candidate (Environmental Engineering), RMIT-UOP Split Ph.D. Programme
Landfill leachate management is one of the major concerns when it comes to solid waste management through landfilling or open dumping. This liquid consists of dissolved organic matter, inorganic macro compounds, heavy metals and xenobiotic organic compounds. In recent studies, leachate has been identified to be a main secondary source of emerging contaminants. In order to eliminate the environmental impacts and to satisfy regulatory requirements of leachate discharge, leachate should be managed properly. Treatment of landfill leachate is the mostly used method of leachate management. Different treatment technologies have been utilized to treat leachate and membrane bioreactor has proven to perform well in leachate treatment.
Eng. H.G.S. Mayuranga
Ph.D. Candidate (Geotechnical Engineering), University of Peradeniya
Railway transportation is becoming popular with the growing demand and the numerous advantages of the presence of high-speed trains in many countries. In spite of its advantages, acceleration of track deterioration due to heavier loads and higher speeds is one of the major challenges in its development. Under repetitive train loads, the degradation of the key load-bearing ballast layer is vital and leading to a decrease in shear strength, excessive track settlements and hinder track drainage. To overcome these drawbacks, adoption of resilient rubber pads such as rail pads (RP), under sleeper pads (USP) and under ballast mats (UBM) has become the most popular method in many countries. However, only limited studies have been conducted on the geotechnical behaviour of ballast when these rubber pads are adopted. Therefore, this study focuses on evaluating the stress-strain and degradation behaviour of ballast with and without the inclusion of rubber elements to track.
Eng. (Ms) R.M.D.L. Rathnayake
M.Phil. Candidate (Structural Engineering), University of Peradeniya
Railway network is one of the main transportation modes which is economical and widely used all over the world. A typical railway track of ballast consists of the superstructure and the substructure. The superstructure consists of the rails, the fastening systems, and the sleepers, whereas the substructure consists of the ballast, the sub-ballast and the subgrade. The behaviour of the superstructure and substructure below is always interdependent. Although software with advanced soil models is often used to represent the complex soil characteristics, merging such a model with the superstructure modelled in detail will demand unrealistic large computational cost. Adopting a law fidelity model which can represent the railway substructure with a sufficient accuracy can reduce the computational cost significantly. This study focuses on coupling simplified substructure models with high fidelity finite element superstructure model with acceptable accuracy and recommending the best simplified model to be used in a particular case.

Department of Civil Engineering