Activation properties of iron ore tailings-fly ash-lithium slag ternary system admixture
In order to realize the building resource utilization of iron ore tailings,it took high silica-iron ore tailings as the main raw material and combined fly ash and lithium slag to form iron ore tailings-fly ash-lithium slag ternary system admixture.The effects of the proportion of iron ore tailings-fly ash-lithium slag ternary system admixture,the dosage of activator(Ca(OH)2),and the percentage of cement replaced by admixture on the activity index were obtained from the compressive strength tests.The results showed that when the iron ore tailings-fly ash-lithium slag ternary system admixture with a ratio of iron ore tailings∶fly ash∶lithium slag=1∶2∶2,an activator is 0.8％Ca(OH)2 and an admixture substitution is 35％,the specimens had the highest 28 d compressive strength 43.6 MPa,which was 100％of the pure cement control.The results of the rmogravimetric experiments showed that the activator Ca(OH)2 had a significant promotion effect on the activity of the admixture,and the 28 d activity index was increasing in the dosage of 0 to 0.8％,and the 28 d activity index was decreasing in the dosage of 0.8％to 1.6％,the optimum doping amount was 0.8％.The microscopic morphology of the specimens doped with the admixture became denser.
iron ore tailingsadmixturecompressive strengthactivity index
万方数据
维普
