Recycling of eps foam and demolition wastes in the preparation of ecofriendly render mortars with thermal-acoustic insulation properties

The design of render-mortars from construction and demolition waste (CDW) was evaluated. Fine aggregates from red-clay-brick waste, mortar and concrete waste were used, together with recycled expanded-polystyrene (EPS) as lightweight filler. Mixes composed of 70%-recycled aggregates, and 30% consist...

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Bibliographic Details
Published inMateriales de construcción (Madrid) Vol. 73; no. 351; p. e317
Main Authors Acevedo-Sánchez, C.D., Villaquirán-Caicedo, M.A., Marmolejo-Rebellón, L.F.
Format Journal Article
LanguageEnglish
Published Madrid Consejo Superior de Investigaciones Científicas 2023
Subjects
Acoustic absorption
Acoustic insulation
Acoustic properties
Acoustics
Aggregates
Biodegradable materials
Bricks
Cement
Circular economy
Composite
Composite materials
Compressive strength
Concrete aggregates
Demolition
Demolition waste
Energy
Environmental impact
Grain size
Interior render mortar
Landfill
Mechanical properties
Mixtures
Mortars (material)
Particle size
Polystyrene resins
Portland cements
Raw materials
Recycling
Thermal conductivity
Useful life
Waste disposal
Colombia
United States > US
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Summary:The design of render-mortars from construction and demolition waste (CDW) was evaluated. Fine aggregates from red-clay-brick waste, mortar and concrete waste were used, together with recycled expanded-polystyrene (EPS) as lightweight filler. Mixes composed of 70%-recycled aggregates, and 30% consisting of a matrix of Portland cement were produced. Characterization tests were conducted on the physical, mechanical, thermal, and acoustic properties. The render-mortar A4, A7 and A9 can be classified according to compressive strength results as CSI-W0 for interior use under standard UNE-EN-998-1. The A7 mortar, with the best physical and mechanical results, contained 21% EPS, 17.5% brick waste and 17.5% mortar waste. Mix A4 obtained the lowest thermal conductivity, 0.12 W/m·K - a reduction of 79% compared to the commercial-mortar AC1. The acoustic absorption properties were also enhanced by the incorporation of EPS, such that the A4, A7, and A9 mixes were identified as Absorbent for the frequencies of 2000 Hz and 4000 Hz.
ISSN:0465-2746
1988-3226
DOI:10.3989/mc.2023.342422