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

A kind of asphalt pavement and aggregate technology, applied in the direction of roads, roads, road repairs, etc., to achieve the effect of improving aggregate quality, enhancing adhesion, and reducing the content of weak particles

Inactive Publication Date: 2010-04-07
JIANGXI GANYUE EXPRESSWAY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

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Embodiment Construction

[0037] This example is the contract section of AP1 of Pengze-Hukou Expressway in Jiangxi Province. It is located in Pengze County, Jiujiang City, Jiangxi Province. The main line is 26.98Km long and the connecting line is 8.1Km long. The pavement surface layer is 4cmAC13 modified asphalt concrete + 6cmAC20 Modified asphalt concrete + 8cmAC25 ordinary asphalt concrete. The main project quantities include: 189,000 m3 of graded gravel subbase, 265,000 m3 of water-stabilized base, and 119,000 m3 of asphalt concrete surface.

[0038] The construction unit increased investment and innovated construction technology to ensure the quality of pavement preparation. In the mixing plant and crushed stone processing plant, the silo site is hardened with 18cm thick water-stabilizing base materials. The roads in the site area are hardened with 20cm thick C20 concrete, and drainage facilities such as cross slopes and grouted rubble drainage ditches are set up to ensure that The drainage is smo...

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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....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C19/05
Inventor 孙斌江涛雷茂锦江祥林彭明时宁
Owner JIANGXI GANYUE EXPRESSWAY
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