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Ultraviolet-rejected solid asphalt, preparation and application thereof

A UV barrier and asphalt technology, applied in building components, building insulation materials, buildings, etc., can solve the problems of unstable asphalt performance, long time-consuming, complicated construction, etc., achieve convenient operation, simple on-site process, and reduce construction time and energy consumption effect

Active Publication Date: 2014-06-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preliminary research on magnesium-aluminum-based layered double hydroxide modified asphalt, researchers found that there were problems such as complex on-site construction, long time consumption, and unstable performance of the modified asphalt.

Method used

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  • Ultraviolet-rejected solid asphalt, preparation and application thereof
  • Ultraviolet-rejected solid asphalt, preparation and application thereof
  • Ultraviolet-rejected solid asphalt, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] According to the number of parts by mass, 50 parts of SK70 # Base asphalt and 10 parts of co-solvent (the co-solvent is mixed by 80 parts of polyethylene resin and 20 parts of ethylene vinyl acetate copolymer in parts by mass) at 180 ° C, shearing and stirring at a speed of 6000 rpm for 1 hour, and then in Add 40 parts of LT-1 magnesium-aluminum-based layered double hydroxide produced by Ruifa Chemical Co., Ltd. (hereinafter referred to as Ruifa LT-1) several times at 160 ° C, stir evenly for 1 hour, then lower it to room temperature for grinding, and prepare Solid particles into UV blocking solid bitumen.

[0029] Add solid particles of UV-blocking solid asphalt to SK90 at 150°C # In road asphalt, UV barrier modified SK90 was obtained after stirring for 0.5h # road asphalt. Carry out ultraviolet aging test (ultraviolet intensity is 1200μw / cm2) to the obtained modified road asphalt 2 , aging for 6 days, the same below), the following tests are based on the "Test Reg...

Embodiment 2

[0035] According to the number of parts by mass, 65 parts of SK70 # Base bitumen and 2 parts of co-solvent (according to the mass parts are mixed by 40 parts of polyethylene resin, 20 parts of styrene-butadiene rubber, 20 parts of styrene-butadiene-styrene block copolymer (SBS) and 20 parts of zinc oxide. into) at 160°C, shear and stir at 3000rpm for 1 hour, then add 35 parts of Ruifa LT-1 several times at 140°C, stir evenly for 2 hours, then drop to room temperature and grind to make a UV-blocking solid Solid particles of bitumen.

[0036]Add solid particles of UV-blocking solid asphalt to SK90 at 145°C # In road asphalt, get UV barrier modified SK90 # road asphalt. Carry out ultraviolet aging test (ultraviolet intensity is 1200μw / cm2) to the obtained modified road asphalt 2 , aging for 6 days, the same below), the test data are shown in Table 2:

[0037] Table 2

[0038]

[0039] Compared with the blank group, the viscosity increase, softening point increase and duc...

Embodiment 3

[0042] In parts by mass, 54 parts of PG70-28SBS modified asphalt and 1 part of cosolvent (by mass parts by 50 parts of carboxylated nitrile rubber, 25 parts of epoxy natural rubber and 20 parts of styrene-butadiene-styrene Block copolymer (SBS) mixed with 5 parts of magnesium oxide) at 170°C, shear and stir at 5000rpm for 2 hours, and then add 45 parts of Ruifa LT-1 at 165°C in several times , uniformly stirred for 1 hour, and then lowered to room temperature for grinding to make solid particles of UV-blocking solid asphalt.

[0043] Add solid particles of UV-blocking solid asphalt to SK90 at 145°C # In road asphalt, UV barrier modified SK90 was obtained after stirring for 1 hour # road asphalt. Carry out ultraviolet aging test (ultraviolet intensity is 1200μw / cm2) to the obtained modified road asphalt 2 , aged for 6 days, the same below), the test data are shown in Table 3:

[0044] table 3

[0045]

[0046]

[0047] Compared with the blank group, the viscosity inc...

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Abstract

The invention discloses ultraviolet-rejected solid asphalt, preparation and application thereof. The ultraviolet-rejected solid asphalt is prepared by mixing asphalt, magnesium-aluminum-based layered double hydroxide and a cosolvent and is solid-particle-shaped. The ultraviolet-rejected solid asphalt comprises the following components in percentage by weight: 50%-65% of asphalt, 30%-45% of magnesium-aluminum-based layered double hydroxide and 1%-10% of cosolvent. The ultraviolet-rejected solid asphalt is solid-particle-shaped (or powder-shaped) under the normal temperature, and compared with common asphalt which needs insulation for storage and needs to be loaded and unloaded in time in the process of production and use, the solid-particle-shaped (or powder-shaped) asphalt is stable in property and is more convenient in transportation and storage; simultaneously, the ultraviolet rejection action is excellent, the ageing resistance of the road asphalt is obviously improved, the use performances of rutting resistance and water stability of asphalt mixture can be effectively improved and the service life of asphalt roads can be prolonged.

Description

technical field [0001] The invention relates to an ultraviolet blocking solid asphalt and its preparation and application. Background technique [0002] Asphalt pavement has become the most widely used high-grade pavement in road construction because of its excellent road performance. However, during the production and use of asphalt, it generally needs to be stored in storage tanks with heat preservation, and it also needs to be unloaded in time after being transported to the destination, which has high requirements for production arrangements. At the same time, asphalt is also an organic mixture, which is easily affected by high temperature and ultraviolet radiation. It will become hard and brittle due to thermal oxygen and photo-oxygen aging, resulting in cracks, ruts, pits, peeling and other diseases on the asphalt pavement. It damages the performance of asphalt pavement and shortens its service life. [0003] Since asphalt is composed of thousands of organic compounds...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K3/22E01C7/26
Inventor 吴少鹏孙艺涵肖月刘全涛唐宁陈宗武曾文博
Owner WUHAN UNIV OF TECH
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