Use of Mine Tailings as Precast Construction Materials through Alkali Activation
AffiliationUniv Arizona, Dept Min & Geol Engn
MetadataShow full item record
CitationHuang, B., Feng, Q., An, D. et al. Use of Mine Tailings as Precast Construction Materials through Alkali Activation. Mining, Metallurgy & Exploration 37, 251–265 (2020). https://doi.org/10.1007/s42461-019-00149-w
JournalMINING METALLURGY & EXPLORATION
Rights© Society for Mining, Metallurgy & Exploration Inc. 2019
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at email@example.com.
AbstractA study of the application of mine tailings as precast construction materials through alkali activation has been carried out, focusing on efficiently activating mine tailings, reducing alkali consumption, decreasing curing time and improving compressive strength. Firstly, the effect of temperature on the alkali activation of mine tailings was studied. Secondly, the impact of additives, i.e., calcium hydroxide and aluminum oxide, on the compressive strength of samples was investigated. Thirdly, the impact of forming pressure on sample strength was studied. Test results showed that unconfined compressive strength (UCS) of 40 MPa was achieved with the geopolymerization products through optimization. Finally, to elucidate the geopolymerization mechanism of mine tailings, microscopic and spectroscopic techniques including SEM/EDX, XRD, and FTIR spectroscopy were used to investigate the microstructure and the elemental and phase composition of the geopolymerization products. The findings of the present work provide a practical method for applying mine tailings as precast construction materials through alkali activation.
Note12 month embargo; published online: 11 December 2019
VersionFinal accepted manuscript