Modeling materials flow of waste concrete from construction and demolition wastes in Taiwan |
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| Institution: | 1. Graduate Institute of Environmental Engineering, National Taiwan University, Room 311, 71,Chou Shan Road, Taipei 10660 Taiwan;2. Columbia University, New York, NY 10027, USA;1. Department of Plant Pathology, University of Wisconsin-Madison, Madison, WI 53706, United States;2. Department of Bacteriology, University of Wisconsin-Madison, Madison, WI 53706, United States;3. Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI 53706, United States;1. Departamento de Construcciones Arquitectónicas I, Universidad de Sevilla, ETS de Arquitectura, IUACC, Avda. Reina Mercedes 2, 41012 Sevilla, Spain;2. School of Civil and Building Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU, United Kingdom;1. ICIST, DECivil, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal;2. ICIST, Lisbon’s Polytechnic Engineering Institute, Rua Conselheiro Emídio Navarro, 1, 1959-007 Lisbon, Portugal;1. University of Cape Verde, Instituto Superior Técnico – Universidade de Lisboa, Department of Civil Engineering, Lisboa, Portugal;2. CERIS & ISEC-Polytechnic Institute of Coimbra, Department of Civil Engineering, Coimbra, Portugal;3. CERIS & Instituto Superior Técnico – Universidade de Lisboa, Department of Civil Engineering, Lisboa, Portugal;1. School of Civil Engineering, Shenzhen University, Shenzhen 518060, China;2. School of Architecture & Built Environment, Entrepreneurship, Commercialization and Innovation Centre (ECIC), The University of Adelaide, Adelaide 5005, Australia |
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| Abstract: | Material flows of concrete from construction and demolition (C&D) waste in Taiwan have grown considerably over the last two decades, Hsiao et al. (2001). This increased flow puts pressure on limited national disposal capacity and has indirectly caused ecological damage to domestic riparian zones used as sources of natural aggregate. Using existing statistics and literature sources for C&D waste generation in Taiwan we have developed a dynamic model of domestic material flows of concrete waste and employ statistical analyses to obtain projections of future material flows. Our major findings are: (1) Taiwan’s rate of waste concrete generation in 2001 for the residential and commercial construction industry was approximately 2.4 Million Metric Tons (MMT) per year, averaging 0.11 metric tons of waste concrete generated annually by each Taiwanese; (2) Around the year 2009, the national rate will more than triple to exceed the spike in C&D concrete waste generation that occurred after the Chi Chi earthquake 9/21/99, 8.5 MMT. (3) Aside from pilot-scale development of waste concrete utilization technology, nationwide recycling rates remain negligible. Without resource recovery, the volume of C&D waste generation by 2009 is projected to occupy nearly 7% of all existing and planned domestic landfill capacity. A target is established to raise resource recovery rates for waste concrete to 50% by 2005 and a 100% nationwide recycling rate by 2009. |
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