Thermal discrete long-storage temperature-mixed dense grading asphalt concrete and preparation method thereof

Abstract

The invention relates to thermal dissociation type long-time storage warm mixing densely-graded asphalt concrete and a preparation method thereof.The thermal dissociation type long-time storage warm mixing densely-graded asphalt concrete is prepared from, by mass, 100 parts of aggregate, 4-8 parts of mineral powder, 4-6 parts of asphalt, 1-1.5 parts of Spro warm mixing disassociation agent and 1-5 parts of warm mixing agent.The maximum nominal grain diameter of the aggregate is 13 mm, and the design porosity of a mixture is 3.5%-4.5%.The Spro warm mixing discrete agent mainly achieves the effects of heat disassociation and reduction of the viscosity of an asphalt binding material on the mixture.The asphalt concrete can be applied to repairing of local damage such as pit slots, slurry spurting, check crack and fracturing of asphalt pavements, bridge floor asphalt pavement layers and tunnel asphalt concrete runway pavements, it is guaranteed that the pavement performance of the mixture completely meets the requirements for the performance of the hot mixing mixture, the problem that an existing diluted asphalt or emulsified asphalt cold repair material is insufficient in performance is solved, and the problem that a material source is hardly found hot material hot repairing can be solved.

Description

technical field [0001] The invention belongs to the hot-mixing and hot-paving asphalt concrete technology for road paving such as highways, urban roads, tunnel pavements, and airport pavements, and relates to a reactive rubber asphalt densely graded concrete, in particular to a heat-discrete long-term temperature storage Density-mixed and graded asphalt concrete and a preparation method thereof. Background technique [0002] For asphalt pavement, water damage is a typical form of disease, especially during construction, mixture temperature segregation, aggregate segregation, and insufficient compaction can cause local water seepage in the pavement. When the load is applied, the seepage water is squeezed out, and when the load is unloaded, the water is sucked in again, and the strong dynamic water pressure caused by the pumping action will repeatedly wash the surface of the asphalt mixture and the semi-rigid base layer, resulting in the pumping phenomenon; with the mud, The ...

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Problems solved by technology

In this way, the potholes cannot be repaired in time, and there is a savings type pothole repair.

Even if some contractors bought a large amount of hot mix in advance, it was hard to use up on the same day and a large amount of agglomeration was caused in the stock yard. Before repairing on the road, half of the labor was spent on planing and loading the material, otherwise it would be difficult to use the heating car for heating. , which can reduce the construction efficiency by more than 50%, which will not be able to repair the pits with high construction costs in time

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