Memorias de investigación
Communications at congresses:
Lightweight construction material made with gypsum and extruded polystyrene waste
Year:2015

Research Areas
  • Construction,
  • Architecture

Information
Abstract
Approximately 3.2 million tonnes of synthetic polymers are produced in Spain, from which 14.4% come from the construction industry. From all the waste generated from this material, 55% is disposed in landfills, 17% goes to energy recovery system and only 28% is actually recycled. Extruded Polystyrene (XPS) is one of the most used synthetic polymers and it is used as insulation material in construction industry, generating approximately 5% of waste by weight of its total production in the building process, meaning a high volume of waste due to the low density of the material. This waste is non-biodegradable and hence its proper management is necessary to reduce its environmental impact. However, despite the existence of recycling techniques for XPS, only 30% of this waste is currently recycled, mainly due to the high cost of this process. Therefore, the aim of this study is to analyse the feasibility of reusing XPS waste, obtained from discard construction insulation materials, as a lightweight aggregate in gypsum composites. To this end, several prismatic specimens composed by different XPS waste percentages, different particle sizes with and a fixed consistency at a good workability, were analysed by their density, their shore C surface hardness, their flexural and compressive strength and their thermal behaviour. Results show that it is possible to use XPS waste to produce a lightweight gypsum composite. This aggregate helps reducing density up to 25.5% and improves thermal conductivity up to 30%. However, it also decreases the mechanical strength of the composite significantly, but all composites meet the minimum requirements established for these materials.
International
Si
Congress
II International & VI National Congress on Sustainable Construction and Eco-Efficient Solutions
960
Place
Sevilla
Reviewers
Si
ISBN/ISSN
978-84-608-3831-9
Start Date
25/05/2015
End Date
27/05/2015
From page
324
To page
330
Proceedings Book. II International & VI National Congress on Sustainable Construction and Eco-Efficient Solutions.
Participants

Research Group, Departaments and Institutes related
  • Creador: Departamento: Tecnología de la Edificación