Recycling of construction material helps to conserve the limited landfill spaces and increase the gained cost. Among various types of materials timber and concrete & masonry waste were the most generated waste at construction sites. The recycling practices at construction sites reduces the generation of C&D waste and increase the gained cost. Therefore, this paper aimed to investigate the total recycled C&D waste and gained amount between two different construction sites. The data was collected over 6 months period using direct and indirect measurement. The paper revealed that the gained cost for Site I is RM 29,880.90 while for site II is RM 38,217.80. The CBA revealed that it was positive for these projects with benefits of RM 360.90 and RM 927.80 respectively. This paper provides an awareness for contractors regarding costings that can be gained if the C&D waste was adequately managed. Thus, it directly benefits the construction industry in terms of economic sustainability for a construction project
The government of Malaysia has introduced Industrialised Building System (IBS) or commonly termed offsite construction in other countries to replace the conventional method of construction, as one of the initiatives to overcome the problems related to waste generation and negative environmental impact in the construction industry. There are few studies of the construction waste generation focus on the offsite, particularly at precast production plant as compared to the construction site. This study aims to investigate the significant type of construction waste generated at precast concrete plants in Johor. In order to identify the type of waste generated in the process of manufacturing the precast concrete component, this study involved field observation to three precast concrete plants in Johor, together with analysing the selected organisation’s document on the waste generation and management record. Interviews were also conducted with the production man-ager/engineer to support the data collection process. The findings revealed that, the types of construction waste that commonly found in the precast concrete plants are concrete and steel. The most significant type of waste generated at precast concrete factory is concrete (total 1,298.56 tonnes for 3 factories, followed by 820 tonnes, 350 tonnes and 128.56 tonnes). This study provides useful information concerning waste assessment data to achieve a better understanding of construction waste in the precast concrete manufacturing industry.
Construction and Demolition (C&D) waste is increasing enormously due to rapid growth of construction industry in developing countries. A few irresponsible contractors dumped illegally the excessive C&D waste in the forest, mangrove swamp, oil palm plantations, roadside and in the sea or lake. However, there are some responsible contractors who carried out recycling practices in the construction project to cut the amount of waste sent to gazette landfills which are approved by local authorities or government. Therefore, this paper is aimed to investigate the total C&D waste amount recycled waste before sending it to designated landfills. This study only focused on four types of C&D waste namely timber, metal, concrete and packaging material. The method that is used for this study is ‘on-site quantification’ based on the volume and gathered ‘recorded recycling amount’ from the project manager and safety officer. This study is conducted at two construction apartments (site I and site II) in Johor Bahru. The data collection was taken weekly for 6 months’ period. The collected data were analyzed using cumulative amount of volume, weight in meters (m3) and percentages. As results, timber was the dominant waste produced at site I while metal waste was highly generated in Site II. About 47% (29.85m3) of total waste produced at site I was timber waste. About 49% (50.39m3) of metal waste generated at site II. There are 36.13m3 of C&D waste recycled at site I and 66.21m3 of C&D waste was recycled at site II. The study found that timber and metal were highly recycled waste materials at both apartments. Finally, a total of 473.86m3 waste recycled in both projects, and this amount save from to be dumped at landfills which is not a suitable hierarchy. This study will create awareness to all construction practitioners, about the needs of recycling practice to minimize the amount of C&D waste send to landfills.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.