Preparation and Performance Research of Iron Tailings-steel Fiber Double-mixed Concrete
The long-term accumulation of iron tailings in tailings ponds causes resource waste and environmental damage.Studying the mechanical properties of iron tailings steel fiber concrete is of great significance for the development and utilization of iron tailings.Add iron tailings and steel fibers to concrete to study the changes in compressive strength of concrete under different material ratios.The results show that if the content of iron tailings is too low,less gel like polymers are generated and the bonding effect is weak.If the content of iron tailings is too high,it will lead to a high water content in the concrete,which will reduce the compressive strength of the concrete;Steel fibers have an enhancing effect on the compressive strength of concrete;The dosage of sodium hydroxide and the water cement ratio mainly affect the formation of gel like polymers.A uniformly distributed and sufficient gel like polymer can effectively connect the cement matrix and steel fibers,enhancing the compressive strength of concrete;The optimal ratio of iron tailings to steel fiber concrete is 40%for iron tailings,2%for steel fiber volume of 45 mm length,40%for sodium hydroxide,and 0.2 for water cement ratio.
iron tailingssteel fiberconcreteoptimum ratiomechanical properties
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