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Modified asphalt cement particle, preparation method and applications thereof

A technology of cementing granules and modified asphalt, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of generating harmful gases, affecting the construction environment, and complicated manufacturing equipment, and achieves convenient transportation and use, reduces energy consumption, and is convenient transport effect

Active Publication Date: 2015-03-11
汪红兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In CN200820028856.X and CN201310603066, waste rubber is processed and ground at high temperature to prepare modified asphalt. The manufacturing equipment is complex and harmful gases are generated during the construction process, causing environmental pollution and affecting the construction environment

Method used

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  • Modified asphalt cement particle, preparation method and applications thereof
  • Modified asphalt cement particle, preparation method and applications thereof
  • Modified asphalt cement particle, preparation method and applications thereof

Examples

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preparation example Construction

[0029] Such as figure 1 Shown is the preparation method of modified asphalt cementing particles in the present invention and the preparation process flow chart for preparing modified asphalt mixture, including the following process steps:

[0030] Step A, sending 5-20% waste plastics, 3-30% waste rubber, 60-90% matrix asphalt and 2-10% filler into the kneading and mixing equipment, kneading and extruding Melting the mixture, sending the obtained molten mixture into water granulation equipment, cooling and granulating to obtain modified asphalt cemented granules;

[0031] Step B. The modified asphalt cement particles obtained in step A are partially or completely replaced by ordinary asphalt, and put into the asphalt mixture mixing pot to directly prepare the modified asphalt mixture.

[0032] In the preparation process of the modified asphalt cement particles, the present invention adopts the method of kneader blending and water granulation, wherein the kneading and mixing eq...

Embodiment 1 to 5

[0035] Table 1. Formulas of different modified asphalt cementing particles in Examples 1-5

[0036]

[0037] Note: The rotating speed is 30r / min, and the mixing time is 12min.

Embodiment 1

[0039] Step A: in parts by mass, mix 55kg of heavy-duty No. 70 asphalt, 30kg of tire rubber powder (30 mesh), and 10kg of waste polyethylene plastics in a 200L kneading internal mixer to prepare waste rubber and plastics asphalt cemented particles , the reaction temperature is 140°C, the rotation speed is 30r / min, and the time is 12min. After blending, through screw discharge, single-screw extrusion, and water pelletizer pelletization to obtain modified asphalt cemented pellets, the properties are shown in Table 2.

[0040] Step B: In terms of mass percentage, add 5% modified asphalt cementing particles to 95% asphalt mixture AC-13, mix indoors at 190°C for 3 minutes, and then prepare rubber-plastic modified asphalt mixture The specimens were cured at room temperature for 48 hours to test the performance of the mixture. The performance number of the prepared rubber-plastic modified asphalt mixture is 1, and the performance is shown in Table 3.

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Abstract

The invention relates to a modified asphalt cement particle, a preparation method and applications thereof. The modified asphalt cement particle is composed of the following components in percentage by weight: 5 to 20% of waste and old plastic, 3 to 30% of waste and old rubber, 60 to 90% of matrix asphalt, and 2 to 10% of filling material. The preparation method comprises the following steps: kneading and mixing the raw materials mentioned above in a kneading and mixing facility at a temperature of 100 to 150 DEG C, then transferring the mixture to a screw rod extruder through a spiral, and then transferring the mixture to a granulating facility in water to carry out granulating so as to obtain the modified asphalt cement particles. The provided modified asphalt cement particle can partially or completely replace the common asphalt, and is capable of being directly thrown into an asphalt mixture blending boiler to prepare asphalt mixture directly, wherein the prepared asphalt mixture can be used to build high grade asphalt roads or can be applied to the maintenance and upgrade of old road surfaces. Compared to the conventional production mode of asphalt mixture, the provided preparation method solves the problems that the asphalt is difficult to transport; the asphalt should be heated repeatedly, and thus the energy is wasted; the aging of the asphalt mixture is quick; and the common rubber modified asphalt cannot be processed stably.

Description

technical field [0001] The invention relates to the technical field of modified asphalt preparation, in particular to a modified asphalt cementing particle and a preparation method and application thereof. Background technique [0002] As a continuous seamless pavement, asphalt pavement has the characteristics of shock absorption comfort and easy maintenance, and is the preferred pavement form of high-grade pavement. As a waterproof cementing material, asphalt is the most important bonding material in the pavement, and it has a good bonding effect with the stone ore, so that the asphalt pavement has a good bearing capacity. With the increase of traffic volume and traffic load, people put forward more stringent requirements for road paving asphalt materials, but ordinary asphalt is prone to rutting at high temperature and cracking at low temperature, which cannot fully meet the actual needs. Adding polymers to asphalt can effectively improve the high and low temperature perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L21/00C08L23/06C08K3/26
Inventor 汪红兵王仕峰
Owner 汪红兵
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