Red mud base course and cement concrete road surface composite pavement structure

Abstract

The invention discloses a red mud base course and cement concrete road surface composite pavement structure, which belongs to the field of road engineering and industrial waste resource utilization. The red mud base course and cement concrete road surface composite pavement structure comprises a cement concrete surface course in which red mud is mixed, an asphalt mastic binder course, a red mud base course and a red mud subbase course; and the cement concrete surface course in which red mud is mixed, the asphalt mastic binder course, the red mud base course and the red mud subbase course are laid on a soil base from top to bottom. By fully using complementary advantages of rigidities of the red mud modified base course material and the cement concrete material, a novel cement concrete road surface structure is formed through reasonable structural combination; therefore, the application of industrial waste residue red mud in the base course and the surface course of the concrete road surface is realized, the rigidity uniformity of the base course of the cement concrete road surface is improved, diseases such as broken slab and slurry pumping are prevented, and the service life of the cement concrete road surface structure is prolonged while resource utilization of the industrial waste red mud is realized.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a red mud base cement concrete pavement composite pavement structure. Background technique [0002] 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 present, a large amount of red mud cannot be fully and effectively utilized, and can only be piled up in large-area storage yards, which occupies a large amount of land and causes serious pollution to the environment. Although the technology of using red mud as a road base material has been disclosed in a large number of documents, due to the red mud filling roadbed or It cannot meet the requirements of engineering indicators, ...

AI Technical Summary

Problems solved by technology

However, the cement-stabilized macadam structure or lime-fly ash macadam structure used in the base and sub-base of traditional cement concrete pavement structure varies greatly in strength, and the temperature shrinkage and drying shrinkage cracks are relatively serious, which may easily cause broken boards, voids, and cracks in the cement concrete pavement. Diseases such as pumpkin

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