A RESEARCH ON CONSTRUCTION AND DEMOLITION WASTE MANAGEMENT

It is widely recognized that construction activities around the world generate large amounts of waste each year. These wastes not only waste limited natural resources, but also consume large amounts of landfill sites, while polluting the environment and also harming society. Scholars have been studying how to manage waste efficiently. Advances in science and technology have changed the way construction and demolition waste is managed, and BIM, as a powerful construction technology that records building information, has great potential for waste management. Although many scholars have done some effective overviews of BIM and construction waste management, but none of them reveal what are the different trends in the approaches and strategies related to C&DWM before and after the How can BIM and C&DWM be effectively combined? what is the advantages and constraints of this nexus? To address these a systematic overview of BIM applications for C&DW was conducted. The siting of construction waste disposal facilities is an important part of a construction waste recycling strategy. There are many factors affecting site selection, and in particular, ignoring uncertainties can lead to inaccurate results, which can lead to inappropriate site selection. Therefore, two uncertainties, waste supply and transportation costs, are the focus of this study. Based on the traditional nominal facility siting modeling approach and considering the uncertainty of the two parameter intervals. Therefore, a new robust facility siting model was developed in a hybrid programming of CPLEX and MATLAB. The results show (1) The cost of supply uncertainty for construction waste transfer stations and transportation has a significant effect on the total cost of waste disposal, and the total cost of construction waste disposal facility siting and site allocation options is more sensitive to changes in waste supply. (2) As the values of the uncertainty level parameter combinations increase (2%, 7%, 10%), the optimal total cost and α also increase, and the trend of change is from obvious to slow. (3) The optimal cost of the layout of the construction waste transfer station collection and disposal facility was determined in Guangzhou City as an example. This study contributes to the enrichment of the body of knowledge on waste and solid waste management，as it reveals trends in construction and demolition waste management before and after the application of BIM technology. and it provided a scientific and effective method for the location of construction waste disposal facilities by considering multiple uncertain factors. This can also help stakeholders reduce the costs of the distribution net and choose appropriate interval value according to preference for risk.