Research On The Strength Mechanism Of Inorganic Binder Iron Tailings And The Optimization Design Application To The Base Layer

Iron tailings as a solid waste,because of lacking reasonable and effective methods in using the iron tailings,making a large number of iron ore tailings deposited and endanger the surrounding environment,so find a reasonable way in using is essential.In recent years,some scholars have applied iron ore tailings to the application of base materials.However,the theoretical basis for the strength of iron ore tailings of inorganic binders and the technical standards for the application of iron tailings to grassroots projects are lacking.Therefore,the strength formation mechanism of iron ore tailings of inorganic binders and the optimization design applied to the base layer were studied to explore the difference in strength mechanism between iron ore tailings of inorganic binders and ordinary sand in this paper,and to clarify the compatibility of iron ore tailings of inorganic binders.Establish technical standards for the application of base materials for iron ore tailings.The specific research contents and achievements were shown as below:Based on the preparation specifications of cement mortar specimens,the cement mortar sand material with the same water-cement ratio was designed with the iron tailings and ordinary attle.XRD,SEM,and mercury injection test methods were used to study iron tailings and the difference in the action mechanism of common attle in cement cementation system reveals the mechanism of strength formation of cement iron tailings and mortar materials.The results show that the output of hydration products(C-S-H),the distribution of hydration products,and the hazards in the mesoporous structure the pore ratio are closely related to the strength of the mortar material.In combination with the design of cement mortar materials,cement lime and cement fly ash mortar materials were replaced with lime and fly ash to design a certain amount of cement,and the compatibility of iron ore tailings with different inorganic binders in the gelling system was studied.The application of the ore base layer provides theoretical guidance.Research shows that different su bstitution amounts of lime and fly ash have a significant influence on the strength of the inorganic binder iron tailings mortar material,and the strength mechanism is reflected in the distribution of the hydration products and the meso pores.The proport ion of multipore holes in the structure.According to the formation mechanism of iron tailings strength of inorganic binders,the star point design-effect surface optimization method was adopted to study the application standards of iron tailings for the design of base materials,and the influence rule of the characteristics of iron tailings on the durability of base materials was explored.Based on the compressive strength and durability of the iron tailings sand base material,the application criteria for iron ore tailings used in the base layer design were obtained.Relying on the Huibai Expressway in Jilin Province,it built two sections of iron tailings sand base physical engineering.According to the site test results,the iron tailings sand was used for the base project to meet the requirements for use ing,the cost of the iron tailings is analyzed,and the iron tailings sand is shown the application of the road to the grass-roots projects has huge economic benefits and a wide application prospect.This paper studies the strength formation mechanism of the inorganic binder of iron tailings and the optimal design and application of iron tailings engineering.It provides a good theoretical support for the practical engineering application of iron tailings sand and has certain guiding significance for construction projects.