Iron tailing gravel hydraulic pavement base material and preparation method thereof

Abstract

The invention discloses an iron tailing gravel hydraulic pavement base material and a preparation method thereof. According to the novel pavement base material, a special curing agent is adopted to modify and cure iron tailings produced by mining of iron ore enterprises, and a certain proportion of gravels with a certain specification are blended, so that performance indexes such as mechanical properties of the novel pavement base material accord with those of a traditional pavement base material. According to different mixing amounts of a curing agent and different gradations of the tailingsand gravels, the iron tailing gravel hydraulic pavement base material can be selectively used for roads with different grades and different loads. The iron tailings are industrial solid wastes and arelarge in stockpiling amount; at present, China is still in the capital construction peak period, the road construction scale is huge, and traditional soil and gravel materials become scarce resources. The iron tailings are modified into the base material meeting engineering requirements by using a special curing agent, so that the problem of sharp contradiction between supply and demand of traditional engineering materials is solved, a large amount of the iron tailings can be consumed, social, economic, environmental and safety pressure brought by a tailings bank is reduced, the ore enterprises are assisted in building tailings-free mines, and industrial pains of iron mine enterprises are solved.

Description

technical field [0001] The invention relates to the field of road engineering construction, in particular to an iron tailing hydraulic pavement base material and a preparation method thereof. Background technique [0002] In recent years, with the development of my country's economy, iron ore resources have been continuously developed, and the output of iron mine tailings has continued to increase, while the comprehensive utilization rate of the industry is less than 20%. According to incomplete statistics, about 700 million tons of iron ore tailings are discarded every year. For discarded iron tailings, iron ore companies need to build and maintain large-scale tailings storage to solve the problem of iron tailings discharge and stockpiling. But this will bring a series of social problems, such as a large number of tailings occupying land, blocking rivers, polluting the environment, high maintenance costs, and potential safety hazards. As a secondary energy source, iron ta...

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Problems solved by technology

[0004] In the prior art, iron tailings can be used in cement concrete, and its dosage is below 30%. However, due to the small particle size of iron tailings, the strength of concrete made by traditional techniques is small, which cannot meet the road strength requirements; at the same time, the made Due to the large amount of fine materials and large water consumption of concrete, shrinkage cracks are likely to be caused when the moisture is reduced.

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