Ultra-thin wearing layer bituminous concrete material for paving bridge deck and preparation method thereof

Abstract

The invention discloses an ultra-thin wearing layer bituminous concrete material for paving a bridge deck. The material consists of an epoxy asphalt binder and an aggregate in a weight ratio of 4-8:100, wherein the ratio of an epoxy resin to a curing agent-added substrate asphalt is 10-25:100; and the aggregate is prepared from the following raw materials in part by weight: 1,200 to 1,000 parts of basalt aggregate and 1,000 parts of mineral filler. The preparation method comprises the following steps of: 1), based on the weight ratio, blending and uniformly mixing the epoxy resin heated to 75 to 85 DEG C and the curing agent-added substrate asphalt heated to 120 to 130 DEG C to prepare the epoxy asphalt binder, wherein the blending ratio is 10-25:100; and 2), adding the prepared epoxy asphalt binder into the basalt aggregate pre-heated to 110 to 130 DEG C, stirring the mixture for at least 20 seconds in a stirring pot, adding the mineral filler into the stirring pot, stirring again for at least 40 seconds, and obtaining the ultra-thin wearing layer bituminous concrete material for paving the bridge deck.

Description

technical field [0001] The invention relates to an ultra-thin wearing layer asphalt concrete material used for bridge deck pavement and a preparation method thereof, belonging to the technical field of road building materials. Background technique [0002] At present, the bridge deck pavement at home and abroad mostly adopts dense asphalt mixture, which provides good strength and stability for the bridge deck pavement during use, and ensures that vehicles pass smoothly. But at the same time, due to the dense gradation of the pavement materials, the surface of the bridge deck pavement is anti-slip and the drainage performance is reduced in rainy days, and the annual losses caused by traffic accidents are quite huge. Therefore, designing or selecting an ultra-thin asphalt wear layer with excellent drainage and anti-skid functions and laying it on top of the bridge deck pavement can effectively reduce the water mist and water splashes caused by driving on the bridge deck paveme...

AI Technical Summary

Problems solved by technology

[0003] Most of the traditional ultra-thin wearing layer asphalt concrete uses polymer modified asphalt as the binder. Under the influence of traffic load, wind load, temperature change and other factors, the ultra-thin wearing layer has many diseases. The most typical disease is Permanent deformation, scattering and spalling of aggregates, etc., lead to loss of anti-slip ability of ultra-thin wear layer and decrease of drainage capacity, which affects the functional requirements of asphalt concrete of ultra-thin wear layer

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