Recycling sawmilling wood chips, biomass combustion residues, and tyre fibres into cement-bonded composites: Properties of composites and life cycle analysis

Sammanfattning

This study investigated the properties and sustainability of cement-bonded composites containing industrial residues such as wood chips, tyre fibres and biomass combustion residues, i.e. bottom ash (BA) and fly ash (FA). The effect of cement-to-raw material (wood/tyre fibre) ratio (C/RM) and the aggregate content (BA and FA) on thermal and mechanical properties of the composites were investigated. Scanning electron microscopy (SEM) and life cycle analysis (LCA) were also conducted. The results revealed that as the aggregate content increased in wood composites, the mechanical properties also increased. The mean thermal conductivity and volumetric heat capacity of tyre composite samples were 0.37 W/mK and 1.2 MJ/m³K respectively, while the respective values for wood composite samples were 0.29 W/mK and 0.81 MJ/m³K. SEM analysis showed adequate bonding between wood/tyre fibres and cement matrix. LCA revealed that the materials share of the total primary energy use was about 60% for all analysed composites.

Nyckelord

Bottom ash; Cement construction products; Fly ash; LCA; SEM; Thermal conductivity

Publicerad i

Construction and Building Materials
2021, volym: 297, artikelnummer: 123781

SLU författare

• Adamopoulos, Stergios

  • Institutionen för skogens biomaterial och teknologi, Sveriges lantbruksuniversitet
    

Globala målen (SDG)

SDG12 Hållbar konsumtion och produktion

UKÄ forskningsämne

Trävetenskap

Publikationens identifierare

• DOI: https://doi.org/10.1016/j.conbuildmat.2021.123781

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/112106