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Asphalt mixture and preparation method thereof

A kind of asphalt mixture and asphalt technology, which is applied in the field of asphalt mixture and asphalt mixture preparation, can solve the problems of asphalt mixture viscosity reduction, asphalt pavement segregation, asphalt pavement cracks, etc., to enhance crack resistance and reduce air pollution. The effect of good content and performance

Active Publication Date: 2018-07-06
CHINA FIRST HIGHWAY ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] However, when the asphalt mixture provided by the related art is paving the road surface, the viscosity between the asphalt mixtures is greatly reduced, and the phenomenon of segregation and asphalt loosening occurs on the asphalt road surface. After the paving is completed, the asphalt is generally used for a period of time Cracks will appear in the pavement, resulting in extensive repair work on asphalt pavement

Method used

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  • Asphalt mixture and preparation method thereof
  • Asphalt mixture and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Prepare materials: prepare 20 parts by weight of asphalt, 5 parts by weight of rubber, 6 parts by weight of water-soluble silicate, 3 parts by weight of ceramsite, 5 parts by weight of perlite, 3 parts by weight of slag, 3 parts by weight of river sand.

[0033] The first hot melt: preheat the hot melt tank to 150°C, add asphalt into the preheated hot melt tank, heat at 150°C for 30 minutes, then raise the temperature to 170°C, and stir at 170°C 15min.

[0034] The second hot melting: cool the hot-melted asphalt to 155°C, add water-soluble silicate and ceramsite (10 mesh) to the hot-melted asphalt, at a temperature of 160°C, at a speed of 300r / min and stirred for 20min. The above-mentioned water-soluble silicate is sodium silicate.

[0035] The third hot melt: add rubber to the mixture after the second hot melt, and heat stir for 15 minutes at a temperature of 170° C. and a rotational speed of 500 r / min. The above-mentioned rubber is styrene-butadiene rubber.

[0...

Embodiment 2

[0038] Prepare materials: Prepare 30 parts by weight of asphalt, 6 parts by weight of rubber, 8 parts by weight of water-soluble silicate, 5 parts by weight of ceramsite, 8 parts by weight of perlite, 5 parts by weight of slag, 5 parts by weight of river sand.

[0039] The first hot melt: preheat the hot melt tank to 160°C, add asphalt into the preheated hot melt tank, heat at 160°C for 20 minutes, then raise the temperature to 185°C, and stir at 185°C 10min.

[0040] The second hot melting: cool the hot-melted asphalt to 165°C, add water-soluble silicate and ceramsite (30 mesh) to the hot-melted asphalt, at a temperature of 165°C, at a speed of 200r / min and stirred for 30min. The above-mentioned water-soluble silicate is potassium silicate.

[0041] The third heat melting: add rubber to the mixture after the second heat melting, and heat stir for 25 minutes at a temperature of 180° C. and a rotation speed of 400 r / min. The rubber mentioned above is butadiene rubber.

[...

Embodiment 3

[0044] Prepare materials: Prepare 25 parts by weight of asphalt, 5.5 parts by weight of rubber, 7 parts by weight of water-soluble silicate, 4 parts by weight of ceramsite, 7 parts by weight of perlite, 4 parts by weight of slag, 4 parts by weight of river sand.

[0045] The first hot melt: preheat the hot melt tank to 155°C, add asphalt into the preheated hot melt tank, heat at 155°C for 25 minutes, then raise the temperature to 175°C, and stir at 175°C 12min.

[0046] The second hot melt: cool the melted asphalt to 160 ° C, add water-soluble silicate and ceramsite (20 mesh) to the hot melted asphalt, at a temperature of 162 ° C, at a speed of 250r / min and stirred for 25min. The above-mentioned water-soluble silicates are sodium silicate and lithium silicate.

[0047] The third hot melt: add rubber to the mixture after the second hot melt, and heat stir for 20 minutes at a temperature of 175° C. and a rotational speed of 450 r / min. The above-mentioned rubbers are natural...

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Abstract

The invention relates to the technical field of road engineering, in particular to an asphalt mixture and a preparation method thereof. The preparation method comprises the following steps: preparingmaterials and performing hot melting, wherein the step of preparing the materials comprises a substep of preparing asphalt, rubber, water-soluble silicate, ceramsite, perlite, slag and river sand; thestep of performing hot melting comprises the substeps of performing hot melting for the first time, performing hot melting for the second time, performing hot melting for the third time and performing hot melting for the fourth time; the substep of performing hot melting for the first time further comprises the substeps of adding asphalt into a preheated hot melting tank, heating at 150-160 DEG Cfor 20-30 min, and then heating to 170-185 DEG C; the substep of performing hot melting for the second time further comprises the substeps of adding the water-soluble silicate and the ceramsite to the hot-melt asphalt, and performing hot stirring together; the substep of performing hot melting for the third time further comprises the substeps of adding the rubber into a mixture obtained after hotmelting for the second time, heating and stirring; the substep of performing hot melting for the fourth time further comprises the substeps of adding the perlite, the slag and the river sand into a mixture obtained after hot melting for the third time, and performing hot stirring. By the preparation method, the performance of the asphalt mixture can be improved, and the prepared asphalt mixture has improved cracking resistance after being paved.

Description

technical field [0001] The invention relates to the technical field of road engineering, and in particular to a preparation method of an asphalt mixture and the asphalt mixture. Background technique [0002] Asphalt mixture, commonly known as asphalt concrete, is artificially selected with a certain grade of mineral materials, crushed or crushed gravel, stone chips or sand, mineral powder, etc., and a certain proportion of road asphalt materials, mixed under strictly controlled conditions prepared mixture. [0003] However, when the asphalt mixture provided by the related art is paving the road surface, the viscosity between the asphalt mixtures is greatly reduced, and the phenomenon of segregation and asphalt loosening occurs on the asphalt road surface. After the paving is completed, the asphalt is generally used for a period of time Cracks can then appear in the pavement, resulting in extensive repair work on the asphalt pavement. Contents of the invention [0004] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B2111/343C04B18/22C04B22/00C04B18/142C04B18/027C04B14/18C04B14/06
Inventor 陈胜亮唐有为张守昆
Owner CHINA FIRST HIGHWAY ENG
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