دانلود رایگان مقاله مدیریت زنجیره تامین لجستیک معکوس در پروژه های ساختمانی

Abstract

The paper discusses reverse logistics of construction products and materials during repair and demolishing works. In search of effective demolishing waste management methods the following options are considered in order of priority: reusing, resale, repairing, refurbishing, or other methods, ending with energy recovery, and finally disposal. All these methods are related to planning and organizing supply chains, which here are called reverse supply chains, encompassing physical flows of waste and accompanying information. Detailed examples which occur in logistics of such projects are discussed using an example. Disposal costs and increasingly rigorous waste management laws encourage effective waste management. The research and analyses indicate that launching reverse supply chains within a project has a significant added value for a business.

Construction waste management is the key element in demolition and repair projects. High waste disposal costs demand a well-thought-out waste management, including differentiation of waste recipients. The basis for expansion of reverse supply chain is separate waste collection. Expanding the logistic chain to include many waste recipients can bring a significant added value to the business, requiring only market analysis, simple tools (macroscopic evaluation) and processes (cleaning, crushing, screening, cutting, drying), which may take place at a construction site. Recovery of construction products for structural purposes requires higher quality, and consequently more refined methods of processing (e.g. aerodynamic screening, hydrocyclone classification, optical sorting) and testing (e.g. non-destructive testing, mycological examination, compressibility module) of materials and products. In Poland such refined recovery methods of concrete are rare, due to the lack of ready-made technological lines. Much more noticeable, however, is the recovery of wooden structural components and bricks recovery. An economic system that should strive for sustainable development contains, however, an inconsistency. A free market price for waste disposal leads to precedents where long-distance transport of waste is financially justified, with a detrimental effect on the environment.