A kind of asphalt mixture for cement concrete pavement thin layer covering and its preparation and construction method

Abstract

The invention discloses a bituminous mixture used for a thin layer overlay of cement concrete pavement and preparation and construction methods of the bituminous mixture. The bituminous mixture comprises mineral aggregate, bitumen, a fiber stabilizer and an additive, wherein filler in the mineral aggregate is copper tailing power. The bituminous mixture has the advantages that the copper tailing power is used as the filler in the bituminous mixture, thus copper tailing is comprehensively recycled. Besides, the bituminous mixture is superior in performances, is easily compacted, and can be paved on the cement concrete pavement for 1.5-2.5cm; the damaged pavement can be quickly repaired after construction; the smoothness and the skid resistance of the pavement are restored; the quality of the pavement is improved; the service life of the pavement is prolonged; driving comfort and safety are improved; the pavement can also be precured; the construction cost is lowered; energy and resources are saved; influences on environment and facilities are reduced; and the like. Moreover, the preparation method and the construction method of the bituminous mixture are simple and practicable, easy to operate and high in practicability.

Description

technical field [0001] The invention relates to an asphalt mixture and its preparation method and construction method, in particular to an asphalt mixture which recycles copper tailings and applies it to the thin-layer overlay of cement concrete pavement, and its preparation method and construction method, belonging to road engineering The technical field of construction materials used. Background technique [0002] Asphalt concrete pavement is a kind of flexible high-grade pavement. It is relatively simple to repair and add asphalt concrete surface layer to the old asphalt pavement. It only needs to deal with the disease and do a good job in the lap joint process of the old and new pavement, and the effect of the asphalt concrete pavement can be fully exerted. . [0003] In contrast, cement concrete pavement is a rigid high-grade pavement. Under the long-term action of natural environment and vehicle load, coupled with its own defects, once the pavement is damaged, it is d...

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Problems solved by technology

[0005] At present, only some data show that iron tailings sand can be used instead of fine aggregate in asphalt mixture, and there is no data showing that copper tailings can be applied to asphalt mixture, especially for cement concrete pavement thin-layer overlay Among the fillers of the mixture, it has higher requirements for raw materials

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