Browsing by Author "Karunarathne, S"

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  • Development of a treatment technique to reduce the water absorption capacity of recycled aggregates 
    Madawa, WKA; Rathnayake, RMSIB; Wijethunga, DB; Gamage, TC; Karunarathne, S [Conference-Full-text]
    This study was to find a treatment technique to reduce the water absorption of Recycled Aggregates (RA) which involved preparing a coating to reduce the water penetration. The materials considered for the preparation ...
  • Effects of Recycled Fine Aggregate Content on Cementitious Mortar 
    Subasinghe, IS; Madusanka, VPS; Jayasinghe, VRDK; Sundarapperuma, SMAP; Fernando, WSSR; Chandrasiriand, SAKN; Karunarathne, S [Conference-Full-text]
    Properties of the recycled fine aggregates and the suitability of the same in cementitious mortar were studied and compared with those of natural fine aggregates. The results showed that the particle size distribution of ...
  • Effects of recycled fine aggregate content on cementitious mortar 
    Subasinghe, IS; Madusanka, VPS; Jayasinghe, VRDK; Sundarapperuma, SMAP; Fernando, WSSR; Chandrasiri, SAKN; Karunarathne, S [Conference-Full-text]
    Properties of the recycled fine aggregates and the suitability of the same in cementitious mortar were studied and compared with those of natural fine aggregates. The results showed that the particle size distribution ...
  • Effects of varying recycled fine aggregate content and water/cement ratio in bedding mortar 
    Karunarathne, S; Subasinghe, IS; Madusanka, VPS; Jayasinghe, VRDK; Sundarapperuma, SMAP; Fernando, WSSR; Chandrasiri, SAKN [Conference-Full-text]
    This paper presents the results from a research carried out with the aim of analysing the usability of Recycled Fine Aggregates (RFA) produced from Construction and Demolition Waste (CDW), in bedding mortar. Properties ...
  • Feasibility studies of a constructed wetland to treat contaminated water 
    Weerasooriya, UK; Dilrukshi, RAN; Adikari, AMHW; Rajeeth, A; Achchuthan, P; Karunarathne, S [Conference-Full-text]
    Among the vast number of methods that can be applied for the treatment of contaminated water, mine water was identified one of the best methods of treating of abandoned as the subsurface flow constructed wetlands ...
  • Feasibility studies of a constructed wetland to treat contaminated water 
    Weerasooriya, UK; Dilrukshi, RAN; Adikari, AMHV; Rajeeth, A; Achchuthan, P; Karunarathne, S [SRC-Report]
    Among the vast number of methods that can be applied for the treatment of contaminated water, mine water was identified one of the best methods of treating of abandoned as the subsurface flow constructed wetlands through ...
  • Feasibility studies of a constructed wetland to treat contaminated water 
    Weerasooriya, UK; Dilrukshi, RAN; Adikari, AMHV; Rajeeth, A; Achchuthan, P; Karunarathne, S [Article-Full-text]
    Among the vast number of methods that can be applied for the treatment of contaminated water, one of the best methods of treating of abandoned mine water was identified as the subsurface flow constructed wetlands ...
  • In search of future construction material - recycled aggregates for concrete production 
    Premasiri, ESY; Kariapper, ABY; Abeysinghe, AMGGMB; Karunarathne, S [Conference-Full-text]
    Properties of the recycled aggregates and the suitability of the same in structural concrete were studied and compared with those of natural aggregates. The results showed that the particle size distribution of recycled ...
  • In Search of future construction material- recycled aggregates for concrete production. 
    Premasiri, ESY; Kariapper, ABY; Abeysinghe, AMGGMB; Karunarathne, S [Conference-Full-text]
    Properties of the recycled aggregates and the suitability of the same in structural concrete were studied and compared with those of natural aggregates. The results showed that the particle size distribution of recycled ...
  • Modelling of pollutant removal rates in constructed wetlands under varying hydraulic loading rates 
    Udukumburage, RS; Ariyasena, MADN; Rupasinghe, GGMBMB; Karunarathne, S [Conference-Full-text]
    A subsurface horizontal flow constructed wetland located at University of Moratuwa was observed from January 2012 to November 2012 in order to derive empirical equations for the treatment efficiencies of BOD, COD, Nitrate-N, ...
  • Modelling of pollutant removal rates in constructed wetlands under varying hydraulic rates. 
    Udukumburage, RS; Ariyasena, MADN; Rupasinghe, GGMBMB; Karunarathne, S [Conference-Full-text]
    subsurface horizontal flow constructed wetland located at University of Moratuwa was observed from January 2012 to November 2012 in order to derive empirical equations for the treatment efficiencies of BOD, COD, Nitrate-N, ...
  • Natural and enhanced contaminated waters 
    Hettiarachchi, M; Karunarathne, S; Dissanayake, K [Conference-Full-text]
    Chromium is a highly soluble transition metal of vital industrial importance. It occurs in both trivalent and hexavalent forms. Due to many well identified adverse impacts of chromium to human health and natural ecosystems, ...
  • Nutrients, Fe and bacterial removal in sub surface flow constructed wetlands treating polluted mine water 
    Dharmasiri, KLGNC; Yalini, A; Jeewantha, DLC; Karunarathne, S [Conference-Full-text]
    A study was carried out to compare the performance of a pilot scale subsurface flow constructed wetland system to treat polluted water in Ragama prison quarry, an abandoned mine pit Two cement sand tanks with the dimensions ...
  • Parameter estimation of pollutant removal for subsurface horizontal flow constructed wetlands treating greywater 
    Wijesiri, MKBS; Jayasooriya, VM; Karunarathne, S [Conference-Full-text]
    Treatment efficiencies of pilot scale constructed wetland treating greywater from a staff canteen of the University of Moratuwa was studied to estimate the temperature dependent reaction rate constants of specific pollutant ...
  • Problems of ground water in connection with abandoned open pit mines 
    Amarasooriya, AMSB; De Silva, MR; Suraweera, PSTK; Wedage, WN; Karunarathne, S; Disanayake, DMDOK [Conference-Full-text]
    Mining is an essential activity upon which many other industries rely on immensely. The magnitude of the problem caused by abandoned mines in the time to come can be understood from the topographic maps prepared using ...
  • Selection of an effective substrate to treat gray water in horizontal flow constructed wetlands 
    Thirukumaran, AK; Ehamparam, S; Darmini, S; Karunarathne, S [Conference-Full-text]
    A study was carried out to compare the performances of different substrates used in a laboratory scale subsurface flow constructed wetland systems to treat gray water released from the university staff canteen. Three ...
  • Selection of an effective substrate to treat gray water in horizontal flow constructed wetlands 
    Thirukumaran, AK; Ehamparam, S; Darmini, S; Karunarathne, S [Conference-Full-text]
    A study was carried out to compare the performances of different substrates used in a laboratory scale subsurface flow constructed wetland systems to treat gray water released from the university staff canteen. Three ...
  • Suitability of light coloured silicate metamorphic rocks of Sri Lanka in construction industry 
    Karunathilaka, JKWPC; Karunarathne, S; Rohitha, LPS [Conference-Full-text]
    Conventionally, in the local construction industry, darker coloured (melanocratic) rocks are preferred over light coloured (leucocratic) rocks without proper scientific reasoning. Hence, the objective of the study is to ...
  • Suitability of locally occurring clay as liner material 
    Indunil, HWI; Jayasekara, JMNP; Mahesh, TPC; Veenuganan, S; Karunarathne, S; Puswewala, UGA [Conference-Full-text]
    The lowest permeability and highest shear strength are desirable factors when designing a liner system. Adding additives such as coal or mixing with fine clays such as kaolin was also invented to improve the desirable ...
  • Sword ferns for phytoremediation of chromium contaminated waters 
    Hettiarachchi, M; Karunarathne, S; Dissanayake, K [Conference-Full-text]
    Chromium is a highly soluble transition metal of vital industrial importance. It occurs in both trivalent and hexavalent forms. Due to many well identified adverse impacts of chromium to human health and natural ecosystems, ...