A structural design method for deep-thick asphalt pavement of red mud subgrade by Bayer method

Abstract

The invention discloses a method for designing a deep and thick asphalt pavement structure of a red mud roadbed through a Bayer process, belonging to the field of road engineering. The method is characterized by comprising the steps of carrying out red mud layered filling on a newly built roadbed by adopting the Bayer process after adding a special modifier, carrying out treatment on a connection interface of the red mud roadbed and an asphalt layer under the condition of meeting certain bearing capacity requirements, and directly paving a certain thickness of asphalt structure combination layer. According to the method for designing the deep and thick asphalt pavement structure of the red mud roadbed through the Bayer process, the massive pollution-free application of industrial residue red mud in the road engineering is achieved, a pavement base layer does not need to be arranged by the adopted pavement structure, the overall pavement structure is thinner than a traditional pavement structure; a lot of gravel materials are saved; the integral balanced design of the roadbed and pavement structure is ensured by the adopting the design method; and the durable target of the pavement structure of the roadbed is achieved.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a method for designing a Bayer red mud subgrade deep-thick asphalt pavement structure. Background technique [0002] The main negative impact of global industrialization and urbanization is the production of a large amount of industrial waste, which occupies a large amount of land, pollutes the environment, and destroys the ecology. Therefore, the safety management and treatment of industrial waste has become a prominent problem. Among various types of hazardous industrial waste, red mud is a prominent one. Bayer process red mud is the polluting waste slag discharged when the aluminum industry extracts alumina. Generally, for every ton of alumina produced, 1.0 to 2.0 tons of red mud are incidentally produced. The Bayer process red mud produced in the world is about 70 million tons every year, and the red mud produced in my country is more than 30 million tons every year. At pres...

AI Technical Summary

Problems solved by technology

However, at present, there is no complete set of subgrade and pavement structure design methods for red mud-filled subgrades. Red mud-filled subgrades either cannot meet the requirements of engineering indicators or environmental protection indicators, and there are no corresponding design parameters and indicators for pavement design. For reference and follow, the blank of red mud embankment filling and pavement structure design technology restricts the reduction and resource utilization of red mud

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