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Buton rock asphalt modified asphalt mixture heating blending manufacture technology

A technology of asphalt mixture and asphalt modification, which is applied in roads, road repairs, roads, etc., can solve the problem of not considering the ability of coarse and fine aggregates and rock asphalt to absorb asphalt, reducing the economical efficiency of Buton rock asphalt modified asphalt, and the failure to achieve To improve the adhesion and wrapping effect, the mixing process is simple and efficient, and the road performance can be improved.

Inactive Publication Date: 2016-11-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently used rock asphalt conventional mixing process generally first mixes the heated aggregate and rock asphalt at room temperature in a mixing tank, then adds the heated asphalt to the mixing tank for mixing, and finally adds mineral powder, which exists The problems are: (1) The heating of rock asphalt needs to rely on the heat conduction of aggregate and matrix asphalt, and then rock asphalt can be integrated with aggregate and matrix asphalt system. However, in the limited mixing time, only relying on the heat conduction of aggregate and matrix asphalt The heated rock asphalt may not reach the optimum temperature for modification; (2) The difference in asphalt adsorption capacity between coarse and fine aggregates and rock asphalt is not considered, resulting in different asphalt coating conditions for coarse and fine aggregates, which in turn affects mixing. In order to achieve the target porosity, it is necessary to increase the amount of asphalt, resulting in waste of asphalt resources and reducing the economical efficiency of Buton rock asphalt modified asphalt

Method used

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  • Buton rock asphalt modified asphalt mixture heating blending manufacture technology
  • Buton rock asphalt modified asphalt mixture heating blending manufacture technology
  • Buton rock asphalt modified asphalt mixture heating blending manufacture technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Firstly, the Buton rock asphalt is sampled, and then the sample is subjected to an extraction test, and the bitumen content of the Buton rock asphalt is 30.7%. A sieving test was carried out on the asphalt ash material obtained from the extraction test, and the test results are shown in Table 1.

[0032] Table 1 Mineral screening results after extraction of Butonite bitumen

[0033] Mesh size / mm

4.75

2.36

1.18

0.6

0.3

0.15

0.075

Passing rate / %

100

98.93

91.42

84.15

73.38

54.33

38.62

[0034] The coarse aggregate is made of diabase, and the specific screening results are shown in Table 2. The relative density of the aggregate and the ash content of the extracted Butonite asphalt was tested, and the test results are shown in Table 3.

[0035] Table 2 Screening results of coarse and fine aggregates

[0036]

[0037] Table 3 Test results of relative density of aggregate and Buton rock asphalt ash

[0038] ...

Embodiment 2

[0062] Firstly, the Buton rock asphalt is sampled, and then the sample is subjected to an extraction test, and the bitumen content of the Buton rock asphalt is 30.7%. A sieving test was carried out on the asphalt ash material obtained from the extraction test, and the test results are shown in Table 6.

[0063] Table 6 Mineral screening results after extraction of Buton rock asphalt

[0064] Mesh size / mm

4.75

2.36

1.18

0.6

0.3

0.15

0.075

Passing rate / %

100

98.93

91.42

84.15

73.38

54.33

38.62

[0065] The coarse aggregate is made of diabase, and the specific screening results are shown in Table 7. The relative density of the aggregate and the ash content of the extracted Butonite asphalt was tested, and the test results are shown in Table 8.

[0066] Table 7 Screening results of coarse and fine aggregates

[0067]

[0068] Table 8 Test results of relative density of aggregate and Buton rock asphalt ash

[0069...

Embodiment 3

[0093] Indoor test example: first, the Buton rock asphalt is sampled, and then the sample is subjected to an extraction test, and the asphalt content of the Buton rock asphalt is 30.7%. A sieving test was carried out on the asphalt ash material obtained from the extraction test, and the test results are shown in Table 11.

[0094] Table 11 Mineral screening results after extraction of Buton rock asphalt

[0095] Mesh size / mm

4.75

2.36

1.18

0.6

0.3

0.15

0.075

Passing rate / %

100

98.93

91.42

84.15

73.38

54.33

38.62

[0096] The coarse aggregate is made of diabase, and the specific screening results are shown in Table 12. The relative density of the aggregate and the ash content of the extracted Butonite asphalt was tested, and the test results are shown in Table 13.

[0097] Table 12 Screening results of coarse and fine aggregates

[0098]

[0099] Table 13 Test results of relative density of aggregate and Buton ...

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Abstract

The invention relates to a buton rock asphalt modified asphalt mixture heating blending manufacture technology, which comprises the following steps: heating an aggregate for standby application, successively adding heated asphalt, heated rock asphalt and mineral powder, and controlling temperature of the obtained mixture so as to obtain a buton rock asphalt modified asphalt mixture. In comparison with the prior art, the invention has the following characteristics: the technology is easy to realize; the blending process is simple and efficient; use amount of asphalt is small; the mixture is easy for compaction; and the modification effect of buton rock asphalt can be better performed.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to a heating and mixing manufacturing process of Buton rock asphalt modified asphalt mixture. Background technique [0002] The production process of Buton rock asphalt modified asphalt mixture is to mix aggregate, asphalt, rock asphalt and mineral powder in a certain proportion to obtain a hot mix mixture. The main function is to improve the high temperature performance and water stability of the road surface. In this way, the road performance can be improved to meet the needs of traffic load and climate environment. Due to the stable performance of Buton rock asphalt, strong anti-aging ability, and easy solubility in base asphalt, the modified asphalt mixture has the characteristics of simple production process, outstanding performance, and easy popularization and use. [0003] The currently used rock asphalt conventional mixing process generally first mixes ...

Claims

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Application Information

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IPC IPC(8): E01C19/10
CPCE01C19/1054E01C19/1068
Inventor 刘黎萍高经纬李伊
Owner TONGJI UNIV
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