Recovery of waste expanded polystyrene in lightweight concrete production

Scientific paper - Original scientific paper

• Title (croatian): Oporaba otpadnoga stiropora izradom lakoga betona
• Author: Gordan Bedeković https://orcid.org/0000-0002-1083-5218; MBZ: 205792
• Author: Ivana Grčić
• Author: Aleksandra Anić Vučinić
• Author: Vitomir Premur
• Author's institution: University of Zagreb; Faculty of Geotechnical Engineering
• Author's institution: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Mining and Geotechnical Engineering)
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences

Abstract (english)

Polystyrene concrete, as a type of lightweight aggregate concrete, has been used in civil construction for years. The use
of waste expanded polystyrene (EPS) as a fi ll material in lightweight concrete production is highly recommended from
the point of view of the circular economy. Published data shows that an increase in the proportion of lightweight aggregates,
i.e. EPS, results in a decrease in strength, bulk density and thermal conductivity of the concrete. Utilizing large
quantities of waste EPS in non-structural polystyrene concrete production is particularly important. Unlike structural
polystyrene concrete, according to the published papers, non-structural polystyrene concrete has not been investigated
suffi ciently. The purpose of this paper is to determine the infl uence of the ratios of the basic components in a concrete
mixture on the bulk density and compressive strength of non-structural polystyrene concrete produced by utilizing
waste EPS as a fi ll material. The test specimens, i.e. cubes with an edge length of 100 mm each, were prepared in laboratory
conditions by varying the proportions of EPS, sand up to 600 g and cement ranging from 300 g to 450 g per specimen.
Bulk density and compressive strength were determined for the test specimens. Laboratory research results show a
dependence of the component ratio on the bulk density ranging from 360 kg/m3 to 915 kg/m3 and compressive strength
ranging from 0.385 MPa to 2.538 MPa.

Abstract (croatian)

Stiroporbetoni, kao vrsta lakoagregatnih betona, u gradnji se koriste već niz godina. Sa stajališta kružne ekonomije, od
interesa je korištenje otpadnoga ekspandiranog polistirena (EPS) kao punila u njihovoj proizvodnji. Iz dostupnih podataka
lako je uočiti kako s povećanjem udjela lakih agregata, odnosno EPS-a, betonima opadaju čvrstoća, zapreminska
masa i toplinska vodljivost. Posebno je važna izrada nekonstrukcijskih stiroporbetona zbrinjavanjem što veće količine
otpadnoga EPS-a. Za razliku od konstrukcijskih stiroporbetona, a prema dostupnoj literaturi, nekonstrukcijski nisu
dovoljno istraženi. Svrha je ovoga rada utvrđivanje zakonitosti udjela osnovnih sastojaka betona na zapreminsku masu i
tlačnu čvrstoću nekonstrukcijskoga stiroporbetona načinjenoga korištenjem otpadnoga EPS-a kao punila. U laboratorijskim
uvjetima izrađena su probna tijela, kocke stranica 100 mm, variranjem udjela EPS-a, zatim dodavanjem pijeska do
600 g i cementa od 300 do 450 g. Probnim tijelima određene su zapreminske mase i tlačne čvrstoće. Rezultati laboratorijskih
istraživanja pokazali su ovisnost udjela sastojaka na zapreminske mase koje variraju u rasponu do 360 do
915 kg/m3 i tlačne čvrstoće u rasponu od 0,385 do 2,538 MPa.

• Keywords (english): waste expanded polystyrene; lightweight concrete; circular economy
• Keywords (croatian): otpadni ekspandirani polistiren; lakoagregatni beton; kružno gospodarstvo
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Rudarsko-geološko-naftni zbornik
• Numbering: vol. 34, no. 3, pp. 73-80
• p-ISSN: 0353-4529
• e-ISSN: 1849-0409
• DOI: https://doi.org/10.17794/rgn.2019.3.8
• URN:NBN: urn:nbn:hr:169:561034
• Publication: 2019
• Document URL: https://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=324524&lang=en
• Type of resource: Text
• Access conditions: Open access
• Created on: 2020-10-29 13:36:26