Properties of Tungsten Mine Waste Geopolymeric Binder- Introduction II

This is the second part introduction of properties of tungsten mine waste geopolymeric binder.

However, there is little research published, about geopolymeric binders synthesized from mine and quarry wastes. Studies concerning the geopolymerization of different minerals suggest that a wide range of Al–Si based minerals could be used as source precursors. However one should notice that those studies used high purity geological specimens, so mine waste mineral will hardly behave just like it.

Panasqueira is an underground mine situated in central Portugal on the southern edge of the Sierra da Estrela mountain range, a natural park, near the Sierra do Ac¸or, a protected landscape, and also near the Zezere river. Tungsten and tin have been mined in the Panasqueira area since the 1890s. During the mining process two types of mine waste are generated, coarse aggregates derived from rock blasting and waste mud conveyed by pipelines into lagoons amounting for several million tonnes and still generating almost 100 tonnes per day. Previous studies concerning the alkali-activation of TMWM together with a small percentage of calcium hydroxide suggests that a geopolymeric binder with extremely high early age strength can be produced. This paper reports the experimental results on some physical and mechanical properties of TMWM binders.

 

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