Technique for crushing and water washing of aggregates on asphalt pavement of high-speed highway

Abstract

The invention relates to a technique for the crushing and the water washing of aggregates on an asphalt pavement of a high-speed highway, which comprises the following steps: selecting stone blocks at a feeding opening; crushing and sieving stone materials; manufacturing sand by a sand manufacturing machine and removing dust; washing coarse aggregates which are greater than 4.75mm by water; and flushing sewage, precipitating and recycling. By crushing three times, sieving four times, adopting the sand manufacturing machine to match with high-power dust removal equipment, arranging fan drum cloth at a discharge port of the sand manufacturing machine and arranging a water spraying facility for spraying water in a proper amount, the invention can effectively reduce dust emission and pollution to an ambient environment; the aggregates can be quickly and effectively washed in an omnibearing way by arranging a high-pressure water spraying pipe network above a vibration sieve, by washing the aggregates through limewater the surface cleanness and the surface alkalinity of the aggregates can be enhanced, and the adhesion property of asphalt is reinforced; and a five-level settling tank technology is adopted, flushing water is recycled, the cleanness of the used water is ensured, and water resources can be saved.

Description

technical field [0001] The process of the invention relates to the production and processing of asphalt concrete pavement surface layer coarse aggregate (≥4.75cm) for expressway construction projects, in particular to the production and processing process for producing and processing high cleanliness and high asphalt adsorption pavement aggregate. Background technique [0002] my country's expressway construction has developed rapidly, and the production of gravel, which is the basic raw material for expressway construction, has also been greatly developed and improved. The common crushing methods of stone are as follows: [0003] (1) Crushing uses two crushing working faces to exert pressure on the stone to deform and break the stone. [0004] (2) Chopping uses the splitting force generated when the sharp teeth wedge into the material, so that the stone is broken into two pieces along the split surface, and local crushing occurs at the point where the splitting force acts....

AI Technical Summary

Problems solved by technology

At home and abroad, a lot of research work has been done on aggregate crushing theory, crushing machinery design, practice, etc., but there is no literature on comprehensive research on aggregate crushing from the aspects of improving aggregate cleanliness and asphalt adhesion.

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