Abstract
Increasing building construction raises concerns about construction and demolition (C&D) waste management. To assess this issue the building components, the collection schemes, their recycling and disposal should be investigated. In order to manage C&D wastes, paying attention to how this kind of wastes is disposed is imperative for their correct identification. Inattention, lack of organization and proper transport and sanitary disposal of construction and demolition waste lead to problems such as accumulation of construction waste in the streets. However, more than 90 percent of the potential for recycling and re-using as raw materials is provided. Environmental Protection Agency (EPA) has classified C&D wastes into three categories: non-dangerous waste, hazardous wastes and semi-hazardous wastes. Currently in Tehran, an average of about 50,000 tons per day of construction and demolition wastes are produced from which over 30,000 tons per day are dumped in landfills. According to this research more than 57% of these wastes are placed in the first category (non-dangerous waste) and have the potential for being recycled and reused. On the other hand, items that are placed in the second category shall be managed based on the existing laws. This article provides some management solutions including proposing methods for collecting and reusing construction waste in accordance with current market needs in Iran.
Highlights
Solid wastes produced by construction and demolition (C&D) activities, are a significant portion of total municipal solid wastes [1]
According to the U.S Environmental Protection Agency C&D wastes consist of three types of waste: (1) nonhazardous waste; (2) hazardous waste as regulated by the Resource Conservation and Recovery Act (RCRA); and (3) items that contain hazardous components that might be regulated by some states [7]
The proposed method for recycling C&D wastes Currently in Tehran, about 30,000 tons of C&D wastes are daily produced by the civil project and Table IV shows the components of these C&D wastes
Summary
Solid wastes produced by construction and demolition (C&D) activities, are a significant portion of total municipal solid wastes [1]. In Tehran about 18,250,000 tons of C&D wastes are produced annually, which in the absence of this type of waste management, average space for burial is 20768055 cubic meters annually. According to the U.S Environmental Protection Agency C&D wastes consist of three types of waste: (1) nonhazardous waste; (2) hazardous waste as regulated by the Resource Conservation and Recovery Act (RCRA); and (3) items that contain hazardous components that might be regulated by some states [7]. In U.S Under RCRA, many states have specific definitions of C&D debris that effectively determine what materials are allowed to be disposed in nonhazardous waste landfills, C&D landfills, or incinerators. In some countries (such as Iran), hazardous C&D wastes management task is the responsibility of municipalities [8]
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