Deconstruction waste management through 3d reconstruction and bim: a case study

The construction industry is responsible for 50% of the solid waste generated worldwide. Governments around the world formulate legislation and regulations concerning recycling and re-using building materials, aiming to reduce waste and environmental impact. Researchers have also been developing strategies and models of waste management for construction and demolition of buildings. The application of Building Information Modeling (BIM) is an example of this. BIM is emergent technology commonly used to maximize the efficiency of design, construction and maintenance throughout the entire lifecycle. The uses of BIM on deconstruction or demolition are not common; especially the fixtures and fittings of buildings are not considered in BIM models. The development of BIM is based on two-dimensional drawings or sketches, which may not be accurately converted to 3D BIM models. In addition, previous researches mainly focused on construction waste management. There are few studies about the deconstruction waste management focusing on demolition. To fill this gap, this paper aims to develop a framework using a reconstructed 3D model with BIM, for the purpose of improving BIM accuracy and thus developing a deconstruction waste management system to improve demolition efficiency, effective recycling and cost savings. In particular, the developed as-built BIM will be used to identify and measure recyclable materials, as well as to develop a plan for the recycling process

Quantification of C&D waste in the spanish dwellings

The objective of this research is the application of a quantification model of C&D waste, elaborated by the autors in precedent researches, to quantify the C&D waste generated in the construction of 2-storey spanish dwellings. A practical example has been carried out on ten dwellings in Sevilla Spain, thereby allowing the identification and quantification of the C&D waste generated in their construction and its environmental condition. This reference model enables: other researchers to establish comparisons between the various improvements proposed for the minimization of the environmental impact produced in construction; new corrective measures can be proposed in future policy plans that regulate the production and management of C&D waste in construction

The Pedestrian in the Space of the Mid-20th Century Housing Estates in Spain: a current vision

The obsolescence of residential urban complexes built along the 20th century is one of the major problems European cities have to deal for the next decade. Developed to solve a lack of housing problem, they took the form of housing estates in Spain. They were built mainly between 1957 and 1975, creating an urban fabric made up generally by point urban typologies. They were designed as a whole considering both the dwellings architecture and the urban design as equal parts of the project, owing to the needs after the mid-Twentieth Century wars. The aim of the study is to analyze the pedestrian spaces produced by these urban complexes, due to their impact in the city today. To achieve that goal, a case study will be set, analyzing their pedestrian spaces, including the relationship among its elements, visual connections, uses and activities and mobility. The case study will help us to understand this city phenomenon and to propose solutions to reach a more sustainable housing environment. The paper presented comprises a preliminary phase of an in-depth research which, starting from the data and conclusions obtained, want to face and find sustainable and eco-efficient solutions for the open spaces of these Spanish quarters and their pedestrian use