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Basalt fiber reinforced asphalt concrete and preparation method thereof

A technology of basalt fiber and asphalt concrete, which is applied in the field of concrete, can solve problems affecting the service life of asphalt concrete, affect the service life of asphalt pavement, and degrade road performance, and achieve improved anti-ultraviolet aging performance, excellent mechanical and physical properties, and high service life. The effect of longevity

Inactive Publication Date: 2020-09-22
GUANGDONG NO 2 HYDROPOWER ENGINEERING COMPANY LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the road use process, traditional asphalt concrete materials will undergo a series of reactions such as oxidation and polymerization under the action of load and natural environment, resulting in asphalt spalling, fission, rutting on the road surface, aging, and road performance degradation. The influence of radiation on asphalt aging is often ignored, and ultraviolet aging will seriously affect the service life of asphalt concrete, especially in some provinces in my country with strong solar radiation, ultraviolet aging seriously affects the service life of asphalt pavement

Method used

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  • Basalt fiber reinforced asphalt concrete and preparation method thereof
  • Basalt fiber reinforced asphalt concrete and preparation method thereof
  • Basalt fiber reinforced asphalt concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Basalt fiber reinforced asphalt concrete, by mass percentage, includes the following components:

[0030] Petroleum pitch 13%

[0031] Potassium feldspar 60%

[0032] Clay Sand 11%

[0033] Silica fume 1%

[0034] Bentonite 2%

[0035] Modified Basalt Fiber 13%.

[0036] The above-mentioned basalt fiber reinforced asphalt concrete is prepared by the following method:

[0037] The first is the preparation of modified basalt fiber, the preparation method steps are as follows:

[0038] Add basalt fiber to the phosphoric acid solution with a mass concentration of 30%, then add tetrabutyl titanate, and heat to 70°C to react, so that tetrabutyl titanate is dispersed on the surface of basalt fiber and pre-fixed; stop the reaction after 1.5h, filter, Rinse with clean water and then dry; add the reacted, washed and dried basalt fiber into dilute nitric acid with a mass concentration of 8%, and heat to 70°C for reaction; stop the reaction after 1 hour, filter, wash with cle...

Embodiment 2

[0041] Basalt fiber reinforced asphalt concrete, by mass percentage, includes the following components:

[0042] Tar pitch 14%

[0043] Granite 65%

[0044] Clay Sand 12%

[0045] Silica fume 1%

[0046] Bentonite 2%

[0047] Modified basalt fiber 6%;

[0048] The above-mentioned basalt fiber reinforced asphalt concrete is prepared by the following method:

[0049] The first is the preparation of modified basalt fiber, the preparation method steps are as follows:

[0050] Add basalt fibers to the phosphoric acid solution with a mass concentration of 35%, then add isopropyl titanate, heat to 65°C to react, so that isopropyl titanate is dispersed on the surface of basalt fibers and pre-fixed; stop the reaction after 75 minutes, filter, and use Wash with water and then dry; add the basalt fibers that have been reacted, washed and dried into dilute nitric acid with a mass concentration of 10%, and heat to 65°C for reaction; stop the reaction after 40 minutes, filter, wash wi...

Embodiment 3

[0053] Basalt fiber reinforced asphalt concrete, by mass percentage, includes the following components:

[0054] Rubberized asphalt 25%

[0055] Basalt 53%

[0056] Clay Sand 11.5%

[0057] Silica fume 1.5%

[0058] Bentonite 2%

[0059] Modified basalt fiber 7%;

[0060] The above-mentioned basalt fiber reinforced asphalt concrete is prepared by the following method:

[0061] The first is the preparation of modified basalt fiber, the preparation method steps are as follows:

[0062] Add basalt fiber to the phosphoric acid solution with a mass concentration of 40%, then add n-butyl titanate, heat to 60°C to react, so that n-butyl titanate is dispersed on the surface of basalt fiber and pre-fixed; stop the reaction after 1h, filter, and use After washing with clean water, dry; add the basalt fibers that have been reacted, washed and dried into dilute nitric acid with a mass concentration of 12%, and heat to 65°C for reaction; stop the reaction after 45 minutes, filter, wash...

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Abstract

The invention provides basalt fiber reinforced asphalt concrete and a preparation method thereof. The basalt fiber reinforced asphalt concrete comprises the following components in percentage by mass:13-25% of matrix asphalt, 53-65% of a coarse aggregate, 11-20% of a fine aggregate, 1-2% of silica fume, 2-5% of mineral powder and 6-13% of modified basalt fibers. The modified basalt fibers are basalt fibers coated with nano titanium dioxide, the modified basalt fibers are used as a reinforcing agent of the asphalt concrete, and the prepared asphalt concrete has excellent mechanical propertiesand ultraviolet aging resistance when used for asphalt pavements, and can help to absorb and degrade automobile exhaust.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a basalt fiber reinforced asphalt concrete and a preparation method thereof. Background technique [0002] Asphalt concrete can be divided into petroleum asphalt and coal asphalt according to the different binders used. The asphalt pavement paved with two kinds of asphalt concrete has the advantages of good mechanical strength, wear resistance, comfortable driving, small vibration, low noise, and simple construction. With the large-scale spread of highway construction, asphalt concrete is widely used due to its many advantages. However, during the road use process, traditional asphalt concrete materials will undergo a series of reactions such as oxidation and polymerization under the action of load and natural environment, resulting in asphalt spalling, fission, rutting on the road surface, aging, and road performance degradation. The influence of radiation on asphalt aging is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B20/10C04B14/46C04B111/20
CPCC04B20/1066C04B26/26C04B2111/00017C04B2111/0075C04B2111/20C04B2111/2061C04B18/146C04B14/104C04B14/4656C04B14/045C04B18/027C04B14/048C04B14/14
Inventor 余青山谢祥明李意胡磊谢小辉姚楚康赵雅玲邱晓艳
Owner GUANGDONG NO 2 HYDROPOWER ENGINEERING COMPANY LTD
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