Experimental Study On Iron Tailings Alternative Natural Sand

Exploitation of mineral resources which produce a tremendous amount of resourcesgarbage, Tailings. Mine tailings occupation of land, pollute the environment, and evenendanger the people’s lives and property. At the same time, as the growing infrastructureinvestment on construction and road, which made material shortage. The state has adoptedpolicies aimed at preventing any mining. It must to find suitable replacement materials hasbecome a priority. Tailings as a misplaced resource locations, if they can become asubstitute material, not only to revitalize the land, reducing pollution, but also reducematerial costs, and create economic benefits and social benefits, promote the sustainabledevelopment of society. This paper analyzes the composition and properties of irontailings through a series of tests to determine the possibility of mortar used in constructionand road grassroots level.First, the study will be replaced natural sand by an equal volume of iron tailingsordinary mortar performance impact and laws, with the increase in unit volume of thetailings content, mobility first increases and then decreases, mortar hierarchical degreebasically kept between10mm~20mm, antifreeze and other meets performancerequirements. The appropriate ratio of mortar mix can meet the performance requirements,while increasing the amount of cement, the density increase of the mortar, the cement fullycemented aggregates, compressive strength increases. Tests showed that the ratio of1:4cement mortar mix, instead of natural sand tailings is60%of the best.Second, the reference ratio LFS(lime fly-ash soil) and LFR(lime fly-ash gravel)design LFOS(lime fly-ash ore sand) the mix. Iron ore is the aggregate effect of the tail inthe LFOS, by studying the LFOS grass mix unconfined compressive strength test,compaction test, frost resistance test and water resistance test, found that the LFOSstrength is mainly affected by the lime. LFOS’s strength, frost resistance, water resistanceare enhanced with the increase of time. Ultimately determine the optimal ratio of two gray:tailings equal to30:70. By the same ratio of ore with two lime fly ash, fly ash gravelperformance comparison analysis identified two gray ore can be applied to each grade, sub-base of various types of urban roads, secondary roads the following primary andsecondary.