Red mud-based expressway base material

Abstract

The invention discloses a red mud-based expressway base material in the technical field of roadbed materials. The base material comprises the following components in parts by weight: 7-8.5 parts of sintered red mud, 0.5-1.5 parts of fly ash, 1-2 parts of lime, 1.88-8.5 parts of cement, 55-134 parts of broken stone and a small amount of external additive. The components are easy to obtain and low in price, so that the production cost of the base material is lower. In the manufacturing process of multiple ingredients, the same equipment needs to be recycled, the used equipment is extremely few,the use efficiency of the equipment is greatly improved, the manufacturing is simple, the equipment used for manufacturing is convenient to operate, the workload of production personnel is greatly reduced, the material cost ratio is scientific, and the prepared material is relatively balanced in performance in all aspects, has extremely high compressive strength, extremely good dynamic elastic modulus and relatively high splitting strength, and meanwhile, is relatively fast in strength formation, relatively high in practicability and relatively good in mechanical property.

Description

technical field [0001] The invention belongs to the technical field of roadbed materials; in particular, it relates to a red mud-based highway base material. Background technique [0002] Red mud is industrial solid waste discharged from the aluminum industry when extracting alumina. It is called red mud because it contains a large amount of iron oxide and its appearance is similar to red soil. Due to different ore grades, production methods and technical levels, about 1.0-1.8 tons of red mud will be discharged for every 1 ton of alumina produced. As a major producer of alumina, China discharges millions of tons of red mud every year. With the stockpiling of red mud increasing and the pollution to the environment becoming more and more serious, it is urgent to maximize the resource utilization of red mud. [0003] The existing solution to the accumulation of red mud is to mix red mud with lime and other materials to produce a mixed material, and use this material as the ba...

AI Technical Summary

Problems solved by technology

[0003] The existing solution to the accumulation of red mud is to mix red mud with lime and other materials to produce a mixed material, and use this material as the base material of the expressway. This method greatly improves the utilization efficiency of red mud and effectively reduces The accumulation of red mud greatly reduces the pollution to the environment and effectively utilizes red mud as a resource. However, the strength of the traditional red mud roadbed is low, especially after being soaked by water, its hardness and strength are greatly reduced, so it is extremely It is easy to cause the roadbed made of red mud to loosen and lose red mud under the washing of rainwater or long-term use, which will lead to potholes on the road surface or cracks and damages on the road surface, and even cause the road surface to collapse in severe cases, and the lost red mud Intrusion into the soil and accumulation in the soil can easily lead to groundwater pollution. Therefore, the emergence of a red mud-based expressway base material with high strength, high hardness and rain resistance is imminent

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