Research Papers - School of Architecture

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Author: search.filters.author.Perera, REnd date: 2021

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Now showing 1 - 6 of 6
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    “Cradle to Gate” assessment of material related embodied carbon: A design stage stratagem for mid-rise housing in Sri Lanka
    (Elsevier, 2021-01-01) Jayawardana, A; Perera, N; Perera, R
    Achieving low carbon buildings is seen as a key concept in order to reduce carbon emission and mitigate climate change. In contrast to operational emission, material related embodied carbon (EC) in the built environment plays a pivotal role, with the continuous consumption of high carbon emitting materials. This research relates to the ‘Cradle-to-Gate’ system boundary, while limiting its focus on building design stage decisions. A hybrid analysis approach was adopted - a bottom-up process with steps encompassing mass analysis, EC calculation, highlighting carbon hotspots, and ultimately the identification of critical building components. As a case study, multi-storey housing was selected as a critical building typology, in Sri Lanka. The results reveal ‘walls’ as a carbon hotspot that needs to be explored in strategies for mitigation. Substantial EC savings were seen in the selection of fly ash blocks as an alternate material to clay brick or cement block. Changes to the configuration of walls, specifically, bonding patterns and non-inclusion of a plaster layer, also showed savings. This paper, contributes to the understanding of material selection implications - in the cradle-to-gate stage - for the reduction of carbon emissions in mid-rise housing, in the context of Sri Lanka.
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    PublicationOpen Access
    Space Modification and Personalization in Public Housing: Case of Walk-Up Apartments in Sri Lanka
    (researchgate.net, 2019-11) Kularatne, K; Ajanthi Coorey, S. B; Perera, R
    Public housing programs are critical in developing countries such as Sri Lanka where Governments’ aim to accommodate housing affordability through a dynamic housing market addressing the desired housing mobility and choice of housing solutions. The process of public housing production lacks end-user participation in its design stage and instead provides a typical layout to communities with similar needs and requirements. Nevertheless, the end user inhabits the house by a process of modifications addressing their changing needs and requirements. But such process has no involvement of an Architect, thus modifications done without space planning and design knowledge, results in inhabitable spaces and poor quality of the living environment. This study explores the personalization strategies of the public housing process taking two ‘walk-up apartments’ type of public housing schemes as a case study.
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    Assessment of shop house enterprises in the Bangkok metropolitan area in view of environmental and health aspects
    (Elsevier, 2014-04-01) Potipituk, C; Perera, R
    This study aims to assess environmental and health impacts created by shop house enterprises and to identify the factors contributing to those impacts. The work was carried out in Bangkok, Thailand. This study used questionnaire surveys, interviews, and data collection. Responses were obtained from two different groups of stakeholders. First, the perceptions of owners and workers in shop house enterprises of their environmental management practices were determined. A second group of stakeholders consisting of affected community members, customers and relevant decision makers was queried to determine their perceptions of environmental performance of shop house enterprises. Using this strategy, perceived environmental conditions were determined by stakeholders and supported with actual measurement in air and noise pollution generated by shop house enterprises. The study results show that activities of shop house enterprise are perceived to generate adverse environmental and health impacts at various levels. The magnitude of each of these impacts suggests the priority at which policy interventions are needed to address these factors. We conclude that public policy to reduce environmental and health impacts should be done concurrently with efforts to mitigate factors contributing to environmental and health impacts generated by shop house enterprises. The effectiveness of existing environmental management measures for shop house enterprises by a decentralized administrative system requires further examination. It will be necessary to revisit existing environmental management practices for enterprises engaging in high risk activities.
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    PublicationOpen Access
    Impact of urbanization on the water resources and public health in Pathumthani Province, Thailand
    (2006-11-22) Perera, R; Pradhan, P
    This study attempts to analyze and describe the trend and pattern of urbanization, its impact on water resources as well as public health in Pathumthani province, which is an adjacent province of Bangkok Metropolitan. This province has good canal (khlong) network system. These khlongs have their own cultural and historical values. But the province has been promoted as a location for industrial development policy reforms introduced in Thailand in 1977. The study was carried out, using GIS as a tool, to identify the land use change. Major chemical parameters were selected to analysis water quality and cases registered data on water born diseases were analyzed to identify the impact on public health. The study reveals that growths have mainly occurred along the highways, river and khlongs sections. The findings highlight the situation of water quality in river and khlongs arising out of the process of urbanization in the province and its affect on public health.
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    Construction waste management from a gender perspective
    (2008-09) Manowong, E; Perera, R
    Construction industry generates high volume of waste. The availability of dump sites for construction waste is decreasing and becoming a serious problem. Common waste management strategies such as Reduce, Reuse, Recycle (3Rs) can be provided for construction waste management (CWM). However, in order to be extensively implemented in construction industry, such practices need to be recognized by construction operatives and the general public whose behavior may be influenced by their attitudes and perception. A survey was carried out to investigate current situation of CWM in various regions of Thailand. Attitudes, perceptions, and roles of men and women in the construction-related sectors were analyzed. Recommendations are planners and decision-makers to improve the relevant parties’ perception and attitudes towards CWM policy planning and implementation in the GMS countries.
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    PublicationOpen Access
    Problems and prospects of utilizing canal banks to enhance the built-environment in Colombo
    (NSF, 2003-07-27) Perera, R
    Waterfronts are assets that enhance the quality of built-environment in urban areas. They are used as public and recreational spaces in many cities around the world. However, cities and towns in Sri Lanka most often turn their back to water bodies. Colombo has environmental assets in the form of a sea front, a lake and a canal network, yet not much attempt has been made to utilize their potential to enhance the quality of environment of the city until recent times. The lake is being rehabilitated while the canal network has already been rehabilitated under externally funded projects. It is observed that the rehabilitated canal network is fast falling back to its previous state of stagnation and pollution due to non-utilization of improved canals and banks. This paper focuses attention on possible strategies to sustain their improved environmental quality in order to enhance the built-environment of the city