World Construction Symposium

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Browsing World Construction Symposium by Conference "2nd World Construction Symposium"

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    Applicability of socio-economic factors in sustainable construction for sri lankan context
    (Ceylon Institute of Builders - Sri Lanka, 2013-06) Amarakoon, AMDC; Chandrathilake, SR; Nawarathna, RAG; Sandayake, YG; Fernando, NG
    “Sustainability” has emerged as a vibrant field of research and innovation over last few decades. The concept is based on three basic factors; environment, social and economic, namely the Triple Bottom Line. Frequently, the environmental aspect, despite the social and economic aspects, is given a major emphasis in the global arena of sustainable construction. The World Green Building Council (WGBC), being the leading institute in sustainability, has initiated the first step towards assessing the socio economic factors in the field of sustainable construction, which are being neglected in rating green buildings due to its immeasurability as a tool, by developing a framework for assessing the concerns addressed in the Triple Bottom Line. The WGBC criteria presented in seven sections hold concepts developed by the expert panel representing 14 countries, for assessing the social and economic factors. Since the concepts are in contrast with Sri Lankan context, they seek readjustment in order to match Sri Lankan context. Research agenda hascommenced with a comprehensive literature survey, followed by expert interviews and a questionnaire survey. The process of developing the theoretical framework to determine the appropriate weightages between each rating has proceeded using the indicators and benchmarks of the available frameworks. Adjusted criteria of the social and economic factors would be able to improve the applicability of GreenSL to assess the green buildings in Sri Lanka. Developed framework through the evaluation process in the research would be capable of assessing the Sri Lankan sustainable constructions in a more appropriate manner, with proper compositional integration of socio-economic and environment factors. A comprehensive assessment of sustainable construction could be achieved through the developedtheoretical framework that is fitted in to the Sri Lankan context with due consideration on aspects addressed in Triple Bottom Line; economic, social and environment.
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    The reshuffle of risks from implementing bim based integrated project delivery in Sri Lankan construction industry
    (Ceylon Institute of Builders, 2013-06) Abeyratne, A; Jayasena, HS; Sandanayake, YG; Fernando, NG
    The shift from traditional procurement systems, towards more collaborative procurement systems which are backed-up with information and communication technology (ICT), is becoming the new trend in the present day construction industry around the world. Integrated Project Delivery (IPD) and Building Information Modelling (BIM) are the two most emerging and widely used systems to achieve this shift. These concepts are likely to be the new industry standard in the near future due to their collaborative nature, ability to implement sustainable procurement strategies, risk and reward sharing basis and high efficiency of construction by promoting dry construction. Yet, the Sri Lankan construction industry is still following the traditional rigid and highly separated procurement systems with traditional 2D computer aided drafting (CAD). Therefore adopting and continuing BIM and IPD will generate many issues and risks since the industry is used to the absolute opposite of the underlying principles of both BIM and IPD. Under this context, a research is conducted with a broader aim of identifying the potential reshuffle of risks, which a construction project in Sri Lanka would be subjected, if it is delivered through BIM based IPD. This paper contains the preliminary findings of a literature review conducted on the current risks the industry faces and on identifying the requisites of BIM and IPD
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    Use of recycled aggregates in structural concrete
    (Ceylon Institute of Builders - Sri Lanka, 2013-06) Premasiri, ESY; Kariapper, ABY; Abeysinghe, AMGGMB; Karunaratne, S; Sandayake, YG; Fernando, NG
    Properties of the recycled aggregates and the suitability of the same in structural concrete were studied and compared them with natural aggregates. The results showed that the particle size distribution of recycled aggregates is compatible with those of natural aggregates. The recycled aggregates had abrasive and impact values of 48.7% and 27.10%, respectively while those of the natural aggregates were 29.5% and 11.45, respectively. Bulk density of recycled aggregates was 1065 kg/m3 with compared to 1296 kg/m3 of Natural aggregates and the water absorption was 2.82% with compared to 1.22 of Natural aggregates. The mix design proposed for concrete was grade 30. Properties of concrete made under three mixing scenarios of natural aggregate to recycle aggregate proportions such as 50% -50%, 25%-75%, and 0%-100% were compared with those of 100% natural aggregates. With increasing percentage of recycled aggregate content, compressive strength, flexural strength, tensile splitting strength and workability were significantly decreased. According to the results, grade 30 concrete properties could be achieved with mix proportions of 50% natural aggregate and 50% recycled aggregate, without significantly affecting the concrete properties, indicating a 50% saving of natural aggregates thus reducing environmental impacts and enhancing sustainability.