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Low-odor rubber asphalt mixture used for road engineering

A technology for rubber asphalt and road engineering, applied in the field of auxiliary materials used in road engineering, can solve the problems of reducing the adhesion between asphalt and aggregates, difficult to form foamed asphalt, etc., to reduce adverse effects, effectively absorb, and increase the amount of mixing Effect

Active Publication Date: 2019-09-24
HENAN PROVINCIAL COMM PLANNING & DESIGN INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method is not suitable for rubber asphalt mixture, because rubber asphalt is difficult to form foamed asphalt, and the temperature of 160 ℃ ~ 180 ℃ is required in the process of forming foamed asphalt, and the actual mixing process of rubber asphalt may not reach such a high temperature
On the contrary, the large amount of water contained in the zeolite in this method will reduce the adhesion between the asphalt and the aggregate.

Method used

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  • Low-odor rubber asphalt mixture used for road engineering
  • Low-odor rubber asphalt mixture used for road engineering
  • Low-odor rubber asphalt mixture used for road engineering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Preparation of common warm-mix rubber asphalt mixture without zeolite

[0027] There are 100 parts of aggregate and mineral powder in total, the particle size distribution conforms to the median value of the SMA-13 ​​gradation range in the specification, and all aggregates are made of basalt. The different specifications and types of aggregates and mineral powders are shown in Table 1. 5.5 parts of rubber asphalt, 0.3 parts of warm mix agent Cecabase RT.

[0028] Table 1 Specification distribution of aggregate and mineral powder of ordinary warm mix rubber asphalt mixture

[0029]

[0030] When preparing, first preheat the aggregate and mineral powder to 160~170°C, and keep it warm at this temperature for 3 hours; preheat the rubber asphalt to 145~155°C; add the aggregate, warm mixing agent and rubber asphalt to the mixing pot in turn In the process, mix at 150~155°C for 90s, then add mineral powder and continue to mix for 90s to obtain ordinary warm-mix ...

Embodiment 2

[0031] Example 2 Preparation of the low-odor rubber asphalt mixture of the present invention

[0032] Aggregate, zeolite particles and zeolite powder total 100 parts, the particle size of zeolite particles is 0.15~0.3mm, and the particle size of zeolite powder is less than 0.075mm. The aggregates are all basalt. The corresponding particle size distribution of aggregates, zeolite particles and zeolite powder conforms to the median value of the SMA-13 ​​grading range in the specification. The different specifications and types of aggregates, zeolite particles and zeolite powder are shown in Table 2. 5.5 parts of rubber asphalt, 0.3 parts of warm mix agent Cecabase RT.

[0033] Table 2 Specification distribution of aggregate and zeolite in environment-friendly and low-odor rubber asphalt mixture

[0034]

[0035] During preparation, the zeolite granules and zeolite powder are firstly pretreated: the zeolite granules and zeolite powder are placed in a vacuum drying oven, kep...

Embodiment 3

[0037] Example 3 Preparation of ordinary rubber asphalt mixture.

[0038] There are 100 aggregates and mineral powders in total, and their particle size distribution conforms to the median value of the SMA-13 ​​gradation range in the specification. All aggregates are made of basalt. The different specifications and types of aggregates and mineral powders are shown in Table 1. 5.5 parts of rubber asphalt.

[0039] When preparing, first preheat the aggregate to 180~190°C, and keep it warm at this temperature for 3 hours; preheat the rubber asphalt to 165~175°C; add the aggregate and rubber asphalt to the mixing pot, Stir for 90 seconds, and finally add mineral powder and continue stirring for 90 seconds to obtain ordinary rubber asphalt mixture.

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Abstract

The invention discloses a low-odor rubber asphalt mixture used for road engineering. The mixture is prepared from the following components: 85-92 parts of aggregate, 1-3 parts of zeolite particles, 8-12 parts of zeolite powder, 4-8 parts of rubber asphalt, and 0.2-0.4 part of a warm-mixed additive. The mixture is prepared by the following steps: firstly preheating the aggregate, the zeolite particles and the zeolite powder to 160-170 DEG C, and performing heat preservation for 2-4 h; preheating the rubber asphalt to 145-155 DEG C; adding the aggregate and the zeolite particles sequentially into a mixing pot, performing mixing for 90 s at 150-155 DEG C, adding the warm-mixed additive and the rubber asphalt, performing mixing for 90 s, finally adding the zeolite powder, and continuing mixing for 90 s to obtain the finished product of the target mixture. According to the mixture provided by the invention, the zeolite is innovatively applied to the rubber asphalt mixture, the zeolite powder is used to replace mineral powder in an original mixture, the zeolite particles with a same particle size are used to replace aggregate with a corresponding specification in the original mixture, so that the content of the zeolite in the mixture is improved under the premise that road performance of the mixture is ensured, harmful gas is absorbed more effectively, and emission of the harmful gases during mixing and transportation of the rubber asphalt mixture is greatly reduced.

Description

technical field [0001] The invention relates to auxiliary materials used in road engineering, in particular to a low-odor rubber asphalt mixture used in road engineering. Background technique [0002] As an auxiliary material for road engineering construction --- rubber asphalt can not only turn waste tires into treasures, but also reduce the harm of waste tires to the natural environment, and the mixture prepared from rubber asphalt has excellent road performance. Therefore, it is necessary to make full use of rubber asphalt The mixture is of great significance to road construction and environmental protection. However, during the mixing, transportation and rolling process of rubber asphalt mixture, a large amount of irritating and toxic gases will be produced, which not only pollutes the environment but also poses a hazard to the health of construction workers and surrounding residents. Therefore, in order to facilitate the promotion and application of rubber asphalt mixt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B20/04C04B14/04
CPCC04B20/04C04B26/26C04B2111/0075C04B18/22C04B14/14C04B14/047C04B2103/0068
Inventor 王笑风杨博常兴文殷卫永冯大阔毋存粮万晨光褚付克
Owner HENAN PROVINCIAL COMM PLANNING & DESIGN INST CO LTD
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