Samenvatting
In this study, an alternative utilization route for Mineral Wool Waste (MWW) as a solid precursor for artificial aggregate manufacturing is proposed. The process parameters including alkali activation (Na or K) and curing regimes are investigated. Room and high-temperature (1000 °C) characterizations are performed on the plain aggregates and when incorporated in geopolymer composite. The results reveal that with an optimum pre-curing regime at room temperature for 3 days, artificial aggregates with particle density ranging from 1960 to 2090 kg/m3 and crushing strength of 7.0 to 7.9 MPa can be obtained. The behaviour of aggregates is strongly related to the alkali cation type. The Na-based activator with high viscosity resulted in a more irregular grain shape with a lower particle density and a crushing strength as compared to K-activated aggregates. High crystallinity is observed in K-activated aggregates, causing better thermal stability. The alkali-activated artificial aggregates show a geopolymer-like behaviour in geopolymer composites, which contributes to higher strength development over normal sand aggregate.
| Originele taal-2 | Engels |
|---|---|
| Artikelnummer | 132937 |
| Aantal pagina's | 15 |
| Tijdschrift | Construction and Building Materials |
| Volume | 401 |
| DOI's | |
| Status | Gepubliceerd - 19 okt. 2023 |
Bibliografische nota
Funding Information:This research was carried out under project number S17013a in the framework of the Partnership Program of the Materials innovation institute M2i ( www.m2i.nl ), the Technology Foundation TTW, which is part of the Netherlands Organization for Scientific Research ( www.nwo.nl ) (Project No. 16347), China Scholarship Council (Project No. 201906370011) and the department of the Built Environment at Eindhoven University of Technology. The authors gratefully thank Mr. Andreas Leismann (ROCKWOOL) for the materials supply.
Financiering
This research was carried out under project number S17013a in the framework of the Partnership Program of the Materials innovation institute M2i ( www.m2i.nl ), the Technology Foundation TTW, which is part of the Netherlands Organization for Scientific Research ( www.nwo.nl ) (Project No. 16347), China Scholarship Council (Project No. 201906370011) and the department of the Built Environment at Eindhoven University of Technology. The authors gratefully thank Mr. Andreas Leismann (ROCKWOOL) for the materials supply.