Static nondestructive granulation method for waste asphalt mixture

A technology for waste asphalt and mixture, applied in the direction of grain processing, etc., can solve the problems of insignificant effect of asphalt viscosity, inability to meet grading requirements, and low degree of crushing.

Pending Publication Date: 2019-04-02
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working principle of these crushers is crushing by extrusion or percussion. However, RAP material is made of viscous asphalt to bond aggregates of various specifications together. Extrusion or percussion has no obvious effect on the viscosity of asphalt. Therefore, the degree of fragmentation is low and cannot meet the grading requirements

Method used

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  • Static nondestructive granulation method for waste asphalt mixture
  • Static nondestructive granulation method for waste asphalt mixture
  • Static nondestructive granulation method for waste asphalt mixture

Examples

Experimental program
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Effect test

Embodiment 1

[0071] refer to figure 1 , in this embodiment, the material bin 3 should be in a cylindrical shape, because the circular water-absorbing pad can be combined with the cylinder gap and has a larger space, and more RAP materials that need to be broken can be placed. If it is a square or rectangular material The fit of the gap is the same as that of the round bin, but this shape has four right-angled corners. If it is not handled properly, the sealing effect will be greatly reduced; if it is an oval bin, the sealing effect is considerable, but the storage space is limited. , so the circular silo is the best choice.

[0072] Pour an appropriate amount of RAP material into the material bin 3 in advance. Usually, the amount of RAP material occupies no more than two-thirds of the volume in the material bin, so as to reserve enough grouting space. The physical size range of the usual RAP material as follows:

[0073] Step 1, the ratio of the slurry, according to the best experimental...

Embodiment 2

[0087] This embodiment is to improve the crushing scheme and provide a reliable crushing scheme, that is, to replace the vibration cracking machine in step 4, refer to Figure 9 , the rotary crusher 7 is a drum-shaped tank as a whole, and a rotating disk is arranged inside the tank. The top of the tank is a feed inlet 71, the feed inlet is funnel-shaped, and the bottom is a discharge outlet. 72. The discharge port is designed to be funnel-shaped and directly facing the vibrating screening machine below. The inner wall of the tank body is inlaid with a cast iron wear-resistant plate 73. When the central rotating disk 74 rotates at high speed, the asphalt material is thrown out at high speed and hits the outer cast iron wear-resistant plate 73. The above-mentioned rotating disk 74 It is driven by the speed-regulating and variable-frequency motor 75 located below, that is to say, the speed of the rotating disc body is adjustable and controllable. The mechanical installation struc...

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Abstract

The invention discloses a static nondestructive granulation method for a waste asphalt mixture, which is used for recycling the waste asphalt. The method comprises the following steps that step 1, proportioning the slurry, mixing a high-alumina furnace slag with a titanium gypsum according to the ratio of 3: 2 and adding water to form mixed slurry, and the mixed slurry submerges the materials in the container; step 2, absorbing water from the mixed slurry, a water absorption pad completely covers the surface of the mixed slurry in the container, the vacuum water suction machine is started after the container is connected with the vacuum water suction machine, the excessive moisture in the container is absorbed by the water absorption pad and is discharged by the vacuum water suction machine; step 3, standing and maintaining; step 4, carrying out vibration cracking and vibration screening on the cured materials. According to the method, the raw materials are titanium dioxide productionwaste and another waste high-aluminum slag, so that waste materials can be changed into wealth, resources can be recycled, the generated calcium-alum-stone expansion body has no pollution to the environment, the whole process is environment-friendly, and the development of the industry is facilitated.

Description

technical field [0001] The invention belongs to the field of reuse of road engineering construction waste, relates to a new process for crushing waste asphalt mixture (abbreviated as RAP: recycle asphalt pavement), and belongs to the secondary utilization technology of waste asphalt resources. Background technique [0002] After large-scale highway investment and construction, the scale of my country's road network has ranked first in the world. With the increasing development and renewal of highway construction, the traffic volume continues to increase, especially the emergence of a large number of heavy and super heavy-duty trucks, which makes my country's highways need to continue According to preliminary statistics, only major and medium repair projects of trunk roads in my country generate more than 160 million tons of RAP materials every year. At present, the recycling rate of road pavement materials in my country is about 30%, which is far lower than the utilization ra...

Claims

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Application Information

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IPC IPC(8): B02C21/00B02C19/00B02C19/16B02C23/16
CPCB02C19/00B02C19/0018B02C19/16B02C21/00B02C23/16Y02W30/91
Inventor 赵之仲柳泓哲黎奎王娜李颖
Owner SHANDONG JIAOTONG UNIV
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