Abstract
On this work the influence of the addition of different types (commercial and recycled) and contents of expanded polystyrene on the physical and mechanical properties of Portland cement mortars has been studied. Variables studied are: workability, air content, bulk density, mechanical strength, porosity, water absorption and sound absorption. Mixtures have been also characterized by scanning electron microscopy. Air-entraining agents, water retainer and superplasticizer additives have been used in order to improve the workability of mortars. The results show that the workability and mechanical strength decreases with increasing content of expanded polystyrene. Additives improve the workability and porosity, allowing manufacture mortars with high levels of recycled material that show mechanical properties suitable for use as masonry mortars, stucco and plaster.
Highlights
A sustainable resource management means less consumption of raw materials and energy, just as waste reduction
The results show in all cases, a negative correlation between the increase in the Expanded polystyrene foam (EPS) dosage and consistence
Air content and bulk density of fresh mortar (Dmf) of the mortars made with different types and percentages of EPS without additives
Summary
A sustainable resource management means less consumption of raw materials and energy, just as waste reduction. This can be achieved by integrating waste in production processes such as integration of traditional building materials. These new building materials are environmentally more efficient by allowing a saving of raw materials, energy consumption associated with the manufacture of the products they replace, and the preservation of natural areas due to a reduced need for mineral resources. Different agri-food and polymeric waste are being studied (1-3). Expanded polystyrene foam (EPS), represents 0,1% of total municipal solid waste. Various EPS organizations and associations from over thirty countries, among which is Spain, have signed an international agreement on recycling to promote the use of recycled EPS in the widest range of possible applications
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