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Gold-tailings are one of the major mine wastes which is dramatically damaging the environment.With low reactivity in an alkaline medium,gold-tailings are rarely utilized in the geopolymer production.In this work,we investigated the effects of mechano-chemical activation on physical-mechanical properties and structure of gold-tailings and/with geopolymer samples.The structures of the gold-tailings and the geopolymer samples were researched by Fourier transform infrared spectroscopy and X-ray diffraction;the morphology was examined using scanning electron microscopy.All results suggested that mechano-chemical activation increases with the amorphous phase content,then promotes the compressive strength of geopolymer samples from 11.6 to 17.2 MPa.However,the compressive strength decreased when the milling time over than 20 min due to higher water demand and lower packing density.
Gold-tailings are one of the major mine wastes which is dramatically damaging the environment. Low reactivity in an alkaline medium, gold-tailings are rarely utilized in the geopolymer production. In this work, we investigated the effects of mechano-chemical activation on physical-mechanical properties and structure of gold-tailings and / with geopolymer samples. structures of the gold-tailings and the geopolymer samples were developed by Fourier transform infrared spectroscopy and X-ray diffraction; the morphology was examined using scanning electron microscopy. All results suggested that mechano-chemical activation increases with the amorphous phase content, then promotes the compressive strength of geopolymer samples from 11.6 to 17.2 MPa .However, the compressive strength decreased when the milling time over than 20 min due to higher water demand and lower packing density.