Mineral wool waste-based geopolymers

SBE 19 - Emerging Concepts for Sustainable Built Environment

生态环境科学

Yliniemi, Juho^1 ; Luukkonen, Tero^1 ; Kaiser, Anne^2 ; Illikainen, Mirja^1

Fiber and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, Oulu

90014, Finland^1

Saint-Gobain Finland Oy, Strömberginkuja 2, Helsinki

00380, Finland^2

关键词: Building insulations;    Chemical and mineralogical compositions;    CO2 emission reduction;    Construction and demolition;    Geopolymerisation;    Portland cement concretes;    Post-consumer;    Sustainable cements;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/297/1/012006/pdf
DOI  :  10.1088/1755-1315/297/1/012006

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Mineral wools -a general term for stone wool and glass wool- are the most common building insulation materials in the world. The annual amount of mineral wool waste generated in Europe totaled 2.3 Mt in 2010 - including wastes from the mineral wool production and from the construction and demolition industry. Unfortunately, mineral wools are often considered unrecyclable due to their fibrous nature and low density. Thus, the utilisation of post-consumer mineral wool waste in different applications remains low. Mineral wools have a great potential as geopolymer precursors as they have suitable chemical and mineralogical compositions. As geopolymers can provide significant CO2 emission reductions compared to traditional Portland cement concretes, using mineral wool waste as geopolymer precursor would be an attractive utilisation path. Here, we show that mineral wool waste can be geopolymerised to form sustainable cements with good mechanical properties. Geopolymerisation of mineral wool waste therefore offers an attractive route for waste valorisation and production of low-CO2 cements.