Abstract：
:The present work studies consolidation of phosphate mine tailings through alkaline activation process with the addition of slag for adjusting the gel structure. As increasing slag contents in the raw materials, more (Na,K)2O-CaO-Al2O3-SiO2-H2O (C-A-S-H) and (Na,K)2O-Al2O3-SiO2-H2O (N-A-S-H) gels were formed in the mine tailings-based mortars. Compressive strength of the mortars increased as increasing the slag contents from 0 to 40%, and then it kept a plateau. Evolution in microstructure of these mortars were characterized through scanning electron microscopy (SEM), X-ray diffraction (XRD) and nuclear magnetic resonance (NMR) measurements. The study provides fundamentals for the co-disposal of phosphate mine tailings with blast furnace slag through alkaline activation process.
journal_name
Chemospherejournal_title
Chemosphereauthors
Wu J,Li J,Rao F,Yin Wdoi
10.1016/j.chemosphere.2020.126367subject
Has Abstractpub_date
2020-07-01 00:00:00pages
126367eissn
0045-6535issn
1879-1298pii
S0045-6535(20)30560-9journal_volume
251pub_type
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