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A technology of asphalt mixture and asphalt, which is applied in the field of asphalt mixture mixing methods, can solve the problems of uneven thickness of asphalt oil film and affect the performance of asphalt mixture, and achieve the effect of improving economic benefits of enterprises, reducing waste and improving quality
Inactive Publication Date: 2017-06-13
CHANGAN UNIV
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Problems solved by technology
It solves the problem of uneven thickness of asphalt oil film coated on the surface of coarse and fine aggregates and mineral powder, which affects the performance of asphalt mixture in the prior art
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Embodiment 1
[0054] This embodiment provides a mixing method for asphalt mixture, wherein: the ratio of mineral aggregates adopts the requirements of AC-16 mineral aggregate gradation, the asphalt used is SBS modified asphalt, and the quality of the asphalt is 4.5% of the mass of mineral aggregates. The process includes the following steps:
[0055] 1. Preparation stage:
[0056] Prepare the following instruments and materials: ore; SBS modified asphalt; boundary sieve; an electronic scale with a sensitivity of 0.1g and a range of 10kg; a hand shovel; an iron plate.
[0057] 2. Determine the amount of mineral materials and asphalt:
[0058] (2.1) Classification of mineral materials: use the boundary screen to complete the screening of coarse aggregate, fine aggregate and mineral powder.
[0059] (2.2) Weighing of mineral material and asphalt: the total mass of mineral material to be mixed in this embodiment is 3600g, and the mass of asphalt is 3600g×4.5%=162g. The mass ratio of coarse a...
Embodiment 2
[0069] This embodiment provides an asphalt mixture mixing method, wherein: the ratio of mineral aggregate and asphalt adopts the AC-16 mineral aggregate grading requirements, the asphalt used is No. 90 base asphalt, and the asphalt content is 4.1%. The process includes the following steps:
[0070] 1. Preparation stage:
[0071] Prepare the following instruments and materials: Mineral material; No. 90 matrix pitch; boundary sieve; an electronic scale with a sensitivity of 0.1g and a measuring range of 10kg; a hand shovel; an iron plate.
[0072] 2. Determine the amount of mineral materials and asphalt:
[0073] (2.1) Classification of mineral materials: use the boundary screen to complete the screening of coarse aggregate, fine aggregate and mineral powder.
[0074] (2.2) Weighing of mineral material and asphalt: the total amount of asphalt mixture that needs to be mixed in this embodiment is 3600g, and the quality of asphalt is 3600g×4.1%=147.6g, according to the requiremen...
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Abstract
The invention discloses an asphalt mixture blending method which comprises the following steps of (1) dividing mineral aggregates into coarse aggregates, fine aggregates and mineral powder; (2) determining the mass ratios of the coarse aggregates, the fine aggregates and the mineral powder according to the mineral aggregate gradation requirements, and determining the mass ratios of asphalt and the mineral aggregates according to the variety of the asphalt; (3) weighing the coarse aggregates, the fine aggregates and the mineral powder according to the total mass of to-be-mixed mineral aggregates, and separately arranging the coarse aggregates, the fine aggregates and the mineral powder; (4) heating the weighed coarse aggregates, fine aggregates and mineral powder to the operating temperature; and (5) adding the heated coarse aggregates and fine aggregates to a blending device for blending, completely coating the coarse aggregates with the asphalt and then adding the fine aggregates for further blending, adding the mineral powder after the fine aggregates are completely coated with the asphalt, and blending evenly to obtain a finished product asphalt mixture. The problems that asphalt oil films coating the surfaces of the coarse aggregates, the fine aggregates and the mineral powder are not uniform and the performance of the asphalt mixture is affected in the prior art are solved; and the uniform oil films can be formed on the surfaces of the coarse aggregates, the fine aggregates and the mineral powder, so that the quality of the asphalt mixture is improved.
Description
technical field [0001] The invention belongs to the technical field of road engineering, in particular to an asphalt mixture mixing method. Background technique [0002] With the development of the economy, the laying of high-grade pavement in our country is also increasing. Because the asphalt pavement has sufficient mechanical strength and certain elastic and plastic deformation capabilities, it also has the advantages of good vibration damping, low noise, stable and comfortable driving, easy maintenance, and is suitable for road surface construction in stages. Therefore, most of the high-grade pavements that have been repaired and are to be repaired are asphalt pavements. [0003] At present, there are two main processes for mixing asphalt mixture in physical projects: one is the traditional process, first add coarse and fine aggregates to the mixer, then add mineral powder, and finally add asphalt and continue stirring until the asphalt mixture is uniform . The other ...
Claims
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